/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-examples/standard_password_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:06:49,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:06:49,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:06:49,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:06:49,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:06:49,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:06:49,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:06:49,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:06:49,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:06:49,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:06:49,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:06:49,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:06:49,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:06:49,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:06:49,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:06:49,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:06:49,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:06:49,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:06:49,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:06:49,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:06:49,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:06:49,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:06:49,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:06:49,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:06:49,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 08:06:49,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 08:06:49,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 08:06:49,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 08:06:49,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 08:06:49,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 08:06:49,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:06:49,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:06:49,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:06:49,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:06:49,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:06:49,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:06:49,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:06:49,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:06:49,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:06:49,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:06:49,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:06:49,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:06:50,000 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:06:50,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:06:50,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:06:50,001 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:06:50,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:06:50,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:06:50,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:06:50,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:06:50,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:06:50,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:06:50,003 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:06:50,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:06:50,003 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:06:50,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:06:50,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:06:50,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:06:50,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:06:50,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:06:50,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:06:50,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:06:50,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:06:50,005 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:06:50,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:06:50,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:06:50,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:06:50,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:06:50,242 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:06:50,243 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:06:50,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_password_ground.i [2022-01-31 08:06:50,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12924611/9d327e4175e34e3bb7f821b7a1cb281d/FLAGb8fc1b539 [2022-01-31 08:06:50,655 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:06:50,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_password_ground.i [2022-01-31 08:06:50,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12924611/9d327e4175e34e3bb7f821b7a1cb281d/FLAGb8fc1b539 [2022-01-31 08:06:50,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12924611/9d327e4175e34e3bb7f821b7a1cb281d [2022-01-31 08:06:50,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:06:50,679 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:06:50,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:06:50,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:06:50,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:06:50,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:06:50" (1/1) ... [2022-01-31 08:06:50,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@169f3d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50, skipping insertion in model container [2022-01-31 08:06:50,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:06:50" (1/1) ... [2022-01-31 08:06:50,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:06:50,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:06:50,838 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-examples/standard_password_ground.i[817,830] [2022-01-31 08:06:50,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:06:50,860 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:06:50,870 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-examples/standard_password_ground.i[817,830] [2022-01-31 08:06:50,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:06:50,883 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:06:50,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50 WrapperNode [2022-01-31 08:06:50,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:06:50,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:06:50,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:06:50,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:06:50,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50" (1/1) ... [2022-01-31 08:06:50,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50" (1/1) ... [2022-01-31 08:06:50,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50" (1/1) ... [2022-01-31 08:06:50,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50" (1/1) ... [2022-01-31 08:06:50,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50" (1/1) ... [2022-01-31 08:06:50,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50" (1/1) ... [2022-01-31 08:06:50,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50" (1/1) ... [2022-01-31 08:06:50,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:06:50,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:06:50,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:06:50,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:06:50,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50" (1/1) ... [2022-01-31 08:06:50,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:06:50,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:50,948 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 08:06:50,949 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 08:06:50,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:06:50,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:06:50,973 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:06:50,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:06:50,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:06:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:06:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:06:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:06:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:06:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:06:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:06:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:06:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:06:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:06:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:06:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:06:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:06:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:06:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:06:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:06:50,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:06:51,025 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:06:51,026 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:06:51,121 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:06:51,126 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:06:51,126 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:06:51,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:06:51 BoogieIcfgContainer [2022-01-31 08:06:51,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:06:51,128 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:06:51,128 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:06:51,129 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:06:51,132 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:06:51 BasicIcfg [2022-01-31 08:06:51,146 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:06:51,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:06:51,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:06:51,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:06:51,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:06:50" (1/4) ... [2022-01-31 08:06:51,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1355821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:06:51, skipping insertion in model container [2022-01-31 08:06:51,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:50" (2/4) ... [2022-01-31 08:06:51,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1355821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:06:51, skipping insertion in model container [2022-01-31 08:06:51,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:06:51" (3/4) ... [2022-01-31 08:06:51,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1355821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:06:51, skipping insertion in model container [2022-01-31 08:06:51,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:06:51" (4/4) ... [2022-01-31 08:06:51,153 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_password_ground.iJordan [2022-01-31 08:06:51,157 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:06:51,157 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:06:51,194 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:06:51,208 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 08:06:51,208 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:06:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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 08:06:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:06:51,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:51,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:51,225 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash 811394598, now seen corresponding path program 1 times [2022-01-31 08:06:51,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:51,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196202411] [2022-01-31 08:06:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:51,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:51,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:51,442 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 08:06:51,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196202411] [2022-01-31 08:06:51,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196202411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:06:51,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:06:51,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:06:51,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398394098] [2022-01-31 08:06:51,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:06:51,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:06:51,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:06:51,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:06:51,495 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 08:06:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:51,536 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 08:06:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:06:51,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-01-31 08:06:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:51,548 INFO L225 Difference]: With dead ends: 28 [2022-01-31 08:06:51,548 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 08:06:51,550 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 08:06:51,556 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:51,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:06:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 08:06:51,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-31 08:06:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:06:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-31 08:06:51,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2022-01-31 08:06:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:51,589 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-31 08:06:51,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 08:06:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-31 08:06:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:06:51,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:51,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:51,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:06:51,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash -108556184, now seen corresponding path program 1 times [2022-01-31 08:06:51,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:51,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031893516] [2022-01-31 08:06:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:51,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:51,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:51,675 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 08:06:51,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031893516] [2022-01-31 08:06:51,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031893516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:06:51,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:06:51,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:06:51,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313841964] [2022-01-31 08:06:51,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:06:51,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:06:51,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:51,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:06:51,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:06:51,678 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 08:06:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:51,752 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 08:06:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:06:51,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2022-01-31 08:06:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:51,753 INFO L225 Difference]: With dead ends: 28 [2022-01-31 08:06:51,754 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 08:06:51,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:06:51,758 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:51,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 28 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:06:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 08:06:51,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-01-31 08:06:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:06:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 08:06:51,762 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2022-01-31 08:06:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:51,763 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 08:06:51,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 08:06:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 08:06:51,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 08:06:51,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:51,764 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 08:06:51,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:06:51,764 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1350492298, now seen corresponding path program 1 times [2022-01-31 08:06:51,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:51,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482675432] [2022-01-31 08:06:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:51,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:51,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:06:51,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:51,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482675432] [2022-01-31 08:06:51,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482675432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:51,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078541805] [2022-01-31 08:06:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:51,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:51,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:51,859 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 08:06:51,860 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 08:06:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:51,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:06:51,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:06:52,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:06:52,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078541805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:06:52,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:06:52,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:06:52,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23945402] [2022-01-31 08:06:52,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:06:52,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:06:52,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:06:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:06:52,006 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 08:06:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:52,015 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-31 08:06:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:06:52,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 08:06:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:52,017 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:06:52,017 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 08:06:52,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:06:52,020 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:52,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 52 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:06:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 08:06:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 08:06:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:06:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-31 08:06:52,032 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-01-31 08:06:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:52,033 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-31 08:06:52,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 08:06:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-31 08:06:52,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 08:06:52,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:52,035 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 08:06:52,063 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 08:06:52,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:52,260 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:52,261 INFO L85 PathProgramCache]: Analyzing trace with hash -456962165, now seen corresponding path program 1 times [2022-01-31 08:06:52,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:52,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900857055] [2022-01-31 08:06:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:52,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:06:52,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:52,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900857055] [2022-01-31 08:06:52,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900857055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:52,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363031604] [2022-01-31 08:06:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:52,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:52,337 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 08:06:52,338 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 08:06:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:52,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:06:52,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:06:52,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:06:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:06:52,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363031604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:06:52,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:06:52,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:06:52,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181263738] [2022-01-31 08:06:52,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:06:52,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:06:52,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:52,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:06:52,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:06:52,553 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 08:06:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:52,661 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-01-31 08:06:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:06:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 20 [2022-01-31 08:06:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:52,663 INFO L225 Difference]: With dead ends: 40 [2022-01-31 08:06:52,663 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 08:06:52,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:06:52,667 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:52,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 32 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:06:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 08:06:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 08:06:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:06:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-31 08:06:52,674 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2022-01-31 08:06:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:52,675 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-31 08:06:52,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 08:06:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-31 08:06:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 08:06:52,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:52,676 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:52,702 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 08:06:52,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:06:52,892 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash 816475296, now seen corresponding path program 2 times [2022-01-31 08:06:52,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:52,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992312530] [2022-01-31 08:06:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:52,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:53,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 08:06:53,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:53,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992312530] [2022-01-31 08:06:53,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992312530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:53,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479652352] [2022-01-31 08:06:53,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:06:53,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:53,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:53,017 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 08:06:53,018 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 08:06:53,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:06:53,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:06:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:06:53,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 08:06:53,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:06:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 08:06:53,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479652352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:06:53,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:06:53,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 08:06:53,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325319699] [2022-01-31 08:06:53,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:06:53,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:06:53,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:06:53,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:06:53,363 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 08:06:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:53,599 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-01-31 08:06:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:06:53,600 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 35 [2022-01-31 08:06:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:53,602 INFO L225 Difference]: With dead ends: 70 [2022-01-31 08:06:53,602 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 08:06:53,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:06:53,604 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:53,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 42 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:06:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 08:06:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-01-31 08:06:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:06:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-01-31 08:06:53,615 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 35 [2022-01-31 08:06:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:53,615 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-01-31 08:06:53,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 08:06:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-01-31 08:06:53,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 08:06:53,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:53,618 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:53,639 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 08:06:53,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:53,831 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash -318097676, now seen corresponding path program 3 times [2022-01-31 08:06:53,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:53,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233636171] [2022-01-31 08:06:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:53,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:54,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-31 08:06:54,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233636171] [2022-01-31 08:06:54,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233636171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348324009] [2022-01-31 08:06:54,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:06:54,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:54,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:54,075 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 08:06:54,076 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 08:06:54,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:06:54,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:06:54,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 08:06:54,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:54,564 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 08:06:54,564 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 26 treesize of output 10 [2022-01-31 08:06:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-01-31 08:06:54,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:06:54,813 INFO L353 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-01-31 08:06:54,814 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 32 treesize of output 50 [2022-01-31 08:06:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-01-31 08:06:54,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348324009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:06:54,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:06:54,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 25 [2022-01-31 08:06:54,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581947916] [2022-01-31 08:06:54,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:06:54,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 08:06:54,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:54,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 08:06:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-01-31 08:06:54,884 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 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 08:06:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:55,637 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-01-31 08:06:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 08:06:55,638 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 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 65 [2022-01-31 08:06:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:55,639 INFO L225 Difference]: With dead ends: 86 [2022-01-31 08:06:55,639 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 08:06:55,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=665, Invalid=2197, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 08:06:55,641 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 183 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:55,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 61 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:06:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 08:06:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-01-31 08:06:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:06:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-01-31 08:06:55,647 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 65 [2022-01-31 08:06:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:55,647 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-01-31 08:06:55,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 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 08:06:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-01-31 08:06:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 08:06:55,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:55,648 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:55,666 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 08:06:55,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:55,851 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash -200994828, now seen corresponding path program 1 times [2022-01-31 08:06:55,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:55,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210251129] [2022-01-31 08:06:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:55,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:56,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:56,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 08:06:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-31 08:06:56,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:56,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210251129] [2022-01-31 08:06:56,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210251129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:56,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578601211] [2022-01-31 08:06:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:56,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:56,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:56,075 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 08:06:56,077 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 08:06:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 08:06:56,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-01-31 08:06:56,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:06:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-31 08:06:56,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578601211] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:06:56,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:06:56,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-01-31 08:06:56,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372307788] [2022-01-31 08:06:56,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:06:56,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 08:06:56,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 08:06:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 08:06:56,663 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:06:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:57,222 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2022-01-31 08:06:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 08:06:57,222 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 78 [2022-01-31 08:06:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:57,225 INFO L225 Difference]: With dead ends: 146 [2022-01-31 08:06:57,225 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 08:06:57,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 08:06:57,227 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:57,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 42 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:06:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 08:06:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-01-31 08:06:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 139 states have internal predecessors, (141), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:06:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2022-01-31 08:06:57,235 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 78 [2022-01-31 08:06:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:57,235 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2022-01-31 08:06:57,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:06:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2022-01-31 08:06:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 08:06:57,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:57,237 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:57,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:06:57,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:57,448 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:57,448 INFO L85 PathProgramCache]: Analyzing trace with hash -322535507, now seen corresponding path program 2 times [2022-01-31 08:06:57,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:57,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400246273] [2022-01-31 08:06:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:57,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:57,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:57,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-01-31 08:06:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-01-31 08:06:57,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:57,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400246273] [2022-01-31 08:06:57,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400246273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:57,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077854806] [2022-01-31 08:06:57,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:06:57,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:57,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:57,884 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 08:06:57,885 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 08:06:58,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:06:58,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:06:58,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 08:06:58,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2022-01-31 08:06:58,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:06:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-01-31 08:06:59,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077854806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:06:59,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:06:59,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-01-31 08:06:59,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28578600] [2022-01-31 08:06:59,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:06:59,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 08:06:59,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 08:06:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 08:06:59,191 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 54 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 53 states have internal predecessors, (123), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:07:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:00,756 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2022-01-31 08:07:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 08:07:00,757 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 53 states have internal predecessors, (123), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-01-31 08:07:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:00,758 INFO L225 Difference]: With dead ends: 276 [2022-01-31 08:07:00,758 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 08:07:00,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 08:07:00,763 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 505 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:00,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 52 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 08:07:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 08:07:00,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-01-31 08:07:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 268 states have (on average 1.0111940298507462) internal successors, (271), 269 states have internal predecessors, (271), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:07:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2022-01-31 08:07:00,775 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 143 [2022-01-31 08:07:00,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:00,775 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2022-01-31 08:07:00,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 53 states have internal predecessors, (123), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:07:00,775 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2022-01-31 08:07:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 08:07:00,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:00,777 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:00,807 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 08:07:00,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:00,978 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2055924505, now seen corresponding path program 3 times [2022-01-31 08:07:00,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:00,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169960736] [2022-01-31 08:07:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:00,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:02,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:02,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2022-01-31 08:07:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6229 backedges. 2 proven. 2500 refuted. 0 times theorem prover too weak. 3727 trivial. 0 not checked. [2022-01-31 08:07:02,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169960736] [2022-01-31 08:07:02,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169960736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689224964] [2022-01-31 08:07:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:07:02,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:02,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:02,236 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 08:07:02,237 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 08:07:02,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 08:07:02,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:02,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 08:07:02,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:04,098 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 08:07:04,099 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 26 treesize of output 10 [2022-01-31 08:07:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6229 backedges. 2 proven. 346 refuted. 0 times theorem prover too weak. 5881 trivial. 0 not checked. [2022-01-31 08:07:04,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:04,776 INFO L353 Elim1Store]: treesize reduction 50, result has 48.5 percent of original size [2022-01-31 08:07:04,776 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 36 treesize of output 54 [2022-01-31 08:07:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6229 backedges. 50 proven. 199 refuted. 0 times theorem prover too weak. 5980 trivial. 0 not checked. [2022-01-31 08:07:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689224964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:04,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:04,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 12, 11] total 69 [2022-01-31 08:07:04,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769208889] [2022-01-31 08:07:04,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:04,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 08:07:04,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 08:07:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1580, Invalid=3112, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 08:07:04,919 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand has 69 states, 68 states have (on average 2.3823529411764706) internal successors, (162), 67 states have internal predecessors, (162), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:07:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:09,050 INFO L93 Difference]: Finished difference Result 294 states and 296 transitions. [2022-01-31 08:07:09,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 08:07:09,051 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.3823529411764706) internal successors, (162), 67 states have internal predecessors, (162), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 273 [2022-01-31 08:07:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:09,052 INFO L225 Difference]: With dead ends: 294 [2022-01-31 08:07:09,052 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 08:07:09,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 534 SyntacticMatches, 3 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7394 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8831, Invalid=22675, Unknown=0, NotChecked=0, Total=31506 [2022-01-31 08:07:09,058 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 748 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:09,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 103 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 08:07:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 08:07:09,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 289. [2022-01-31 08:07:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 279 states have (on average 1.010752688172043) internal successors, (282), 280 states have internal predecessors, (282), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:07:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 291 transitions. [2022-01-31 08:07:09,067 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 291 transitions. Word has length 273 [2022-01-31 08:07:09,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:09,067 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 291 transitions. [2022-01-31 08:07:09,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.3823529411764706) internal successors, (162), 67 states have internal predecessors, (162), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:07:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 291 transitions. [2022-01-31 08:07:09,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 08:07:09,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:09,070 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:09,091 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 08:07:09,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:09,284 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:09,285 INFO L85 PathProgramCache]: Analyzing trace with hash 523026361, now seen corresponding path program 4 times [2022-01-31 08:07:09,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:09,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453673819] [2022-01-31 08:07:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:09,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:10,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:10,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2022-01-31 08:07:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:10,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2022-01-31 08:07:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 4 proven. 2601 refuted. 0 times theorem prover too weak. 3888 trivial. 0 not checked. [2022-01-31 08:07:10,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453673819] [2022-01-31 08:07:10,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453673819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557706026] [2022-01-31 08:07:10,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:07:10,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:10,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:10,511 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 08:07:10,512 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 08:07:10,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:07:10,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:10,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-31 08:07:10,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 2617 trivial. 0 not checked. [2022-01-31 08:07:11,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 4 proven. 3876 refuted. 0 times theorem prover too weak. 2613 trivial. 0 not checked. [2022-01-31 08:07:14,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557706026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:14,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:14,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-01-31 08:07:14,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787206787] [2022-01-31 08:07:14,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:14,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 08:07:14,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:14,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 08:07:14,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 08:07:14,128 INFO L87 Difference]: Start difference. First operand 289 states and 291 transitions. Second operand has 108 states, 108 states have (on average 4.055555555555555) internal successors, (438), 107 states have internal predecessors, (438), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:07:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:18,966 INFO L93 Difference]: Finished difference Result 554 states and 556 transitions. [2022-01-31 08:07:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 08:07:18,967 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 4.055555555555555) internal successors, (438), 107 states have internal predecessors, (438), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 286 [2022-01-31 08:07:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:18,970 INFO L225 Difference]: With dead ends: 554 [2022-01-31 08:07:18,970 INFO L226 Difference]: Without dead ends: 554 [2022-01-31 08:07:18,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6988 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=16802, Invalid=27930, Unknown=0, NotChecked=0, Total=44732 [2022-01-31 08:07:18,973 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1003 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:18,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 42 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 08:07:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-31 08:07:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2022-01-31 08:07:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 544 states have (on average 1.005514705882353) internal successors, (547), 545 states have internal predecessors, (547), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:07:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 556 transitions. [2022-01-31 08:07:18,985 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 556 transitions. Word has length 286 [2022-01-31 08:07:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:18,986 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 556 transitions. [2022-01-31 08:07:18,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 4.055555555555555) internal successors, (438), 107 states have internal predecessors, (438), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:07:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 556 transitions. [2022-01-31 08:07:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2022-01-31 08:07:18,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:18,994 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:19,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:19,207 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,SelfDestructingSolverStorable9 [2022-01-31 08:07:19,207 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:19,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:19,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1431500034, now seen corresponding path program 5 times [2022-01-31 08:07:19,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:19,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984171966] [2022-01-31 08:07:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:19,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:23,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:23,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 531 [2022-01-31 08:07:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:23,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 539 [2022-01-31 08:07:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 27004 backedges. 4 proven. 10816 refuted. 0 times theorem prover too weak. 16184 trivial. 0 not checked. [2022-01-31 08:07:23,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:23,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984171966] [2022-01-31 08:07:23,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984171966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:23,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529691933] [2022-01-31 08:07:23,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:07:23,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:23,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:23,120 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 08:07:23,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process