/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:06:38,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:06:38,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:06:38,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 16:06:38,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 16:06:38,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 16:06:38,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 16:06:38,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 16:06:38,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 16:06:38,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 16:06:38,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 16:06:38,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 16:06:38,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:06:38,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:06:38,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:06:38,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:06:38,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:06:38,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:06:38,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:06:38,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:06:38,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:06:38,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:06:38,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:06:38,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:06:38,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 16:06:38,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 16:06:38,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 16:06:38,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 16:06:38,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 16:06:38,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-23 16:06:38,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 16:06:38,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 16:06:38,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 16:06:38,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 16:06:38,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 16:06:38,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 16:06:38,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 16:06:38,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 16:06:38,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:06:38,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:06:38,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:06:38,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:06:38,988 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:06:38,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:06:38,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:06:38,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:06:38,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:06:38,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:06:38,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:06:38,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:06:38,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:06:38,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:06:38,991 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:06:38,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:06:38,991 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:06:38,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:06:38,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:06:38,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:06:38,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:06:38,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:06:38,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:06:38,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:06:38,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:06:38,992 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:06:38,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:06:39,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:06:39,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:06:39,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:06:39,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:06:39,229 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:06:39,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-02-23 16:06:39,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a0c48dfe/79aa1dc66fdb4dde8e9581a359d1bfcc/FLAGe8edcb053 [2022-02-23 16:06:39,719 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:06:39,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-02-23 16:06:39,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a0c48dfe/79aa1dc66fdb4dde8e9581a359d1bfcc/FLAGe8edcb053 [2022-02-23 16:06:40,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a0c48dfe/79aa1dc66fdb4dde8e9581a359d1bfcc [2022-02-23 16:06:40,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:06:40,142 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:06:40,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:06:40,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:06:40,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:06:40,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d74dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40, skipping insertion in model container [2022-02-23 16:06:40,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:06:40,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:06:40,303 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-02-23 16:06:40,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:06:40,318 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:06:40,328 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-02-23 16:06:40,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:06:40,340 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:06:40,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40 WrapperNode [2022-02-23 16:06:40,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:06:40,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:06:40,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:06:40,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:06:40,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:06:40,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:06:40,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:06:40,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:06:40,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:06:40,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:40,401 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) [2022-02-23 16:06:40,404 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 [2022-02-23 16:06:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:06:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:06:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:06:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 16:06:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:06:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:06:40,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 16:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 16:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:06:40,444 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 16:06:40,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:06:40,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 16:06:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:06:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:06:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:06:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:06:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:06:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:06:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:06:40,535 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:06:40,536 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:06:40,664 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:06:40,670 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:06:40,670 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 16:06:40,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:06:40 BoogieIcfgContainer [2022-02-23 16:06:40,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:06:40,673 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:06:40,673 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:06:40,676 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:06:40,678 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:06:40" (1/1) ... [2022-02-23 16:06:40,725 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-23 16:06:40,726 INFO L91 elerationTransformer]: Accelerated Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] to Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] [2022-02-23 16:06:40,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:06:40 BasicIcfg [2022-02-23 16:06:40,732 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:06:40,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:06:40,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:06:40,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:06:40,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:06:40" (1/4) ... [2022-02-23 16:06:40,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ce698f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:06:40, skipping insertion in model container [2022-02-23 16:06:40,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:40" (2/4) ... [2022-02-23 16:06:40,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ce698f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:06:40, skipping insertion in model container [2022-02-23 16:06:40,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:06:40" (3/4) ... [2022-02-23 16:06:40,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ce698f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:06:40, skipping insertion in model container [2022-02-23 16:06:40,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:06:40" (4/4) ... [2022-02-23 16:06:40,747 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.iJordan [2022-02-23 16:06:40,751 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:06:40,752 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:06:40,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:06:40,791 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 [2022-02-23 16:06:40,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:06:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-02-23 16:06:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-23 16:06:40,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:40,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:40,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:40,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1427438595, now seen corresponding path program 1 times [2022-02-23 16:06:40,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:40,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102609290] [2022-02-23 16:06:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:40,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:40,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:40,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:40,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102609290] [2022-02-23 16:06:40,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102609290] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:06:40,941 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:06:40,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 16:06:40,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152243931] [2022-02-23 16:06:40,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:06:40,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 16:06:40,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:40,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 16:06:40,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:06:40,970 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-02-23 16:06:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:41,000 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-02-23 16:06:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 16:06:41,003 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 [2022-02-23 16:06:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:41,008 INFO L225 Difference]: With dead ends: 26 [2022-02-23 16:06:41,008 INFO L226 Difference]: Without dead ends: 18 [2022-02-23 16:06:41,009 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 [2022-02-23 16:06:41,013 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 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 [2022-02-23 16:06:41,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:06:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-23 16:06:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-23 16:06:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-02-23 16:06:41,042 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2022-02-23 16:06:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:41,042 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-02-23 16:06:41,042 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) [2022-02-23 16:06:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-02-23 16:06:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 16:06:41,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:41,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:41,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:06:41,044 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:41,045 INFO L85 PathProgramCache]: Analyzing trace with hash -548355260, now seen corresponding path program 1 times [2022-02-23 16:06:41,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:41,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559411808] [2022-02-23 16:06:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:41,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:41,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:41,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:41,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559411808] [2022-02-23 16:06:41,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559411808] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:06:41,210 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:06:41,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 16:06:41,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012952067] [2022-02-23 16:06:41,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:06:41,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 16:06:41,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:41,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 16:06:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 16:06:41,213 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-02-23 16:06:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:41,310 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-02-23 16:06:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 16:06:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2022-02-23 16:06:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:41,312 INFO L225 Difference]: With dead ends: 27 [2022-02-23 16:06:41,312 INFO L226 Difference]: Without dead ends: 23 [2022-02-23 16:06:41,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-23 16:06:41,317 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:41,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:06:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-23 16:06:41,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-02-23 16:06:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-02-23 16:06:41,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-02-23 16:06:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:41,333 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-02-23 16:06:41,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-02-23 16:06:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-02-23 16:06:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-23 16:06:41,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:41,339 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:41,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 16:06:41,340 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1217379968, now seen corresponding path program 1 times [2022-02-23 16:06:41,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:41,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107755639] [2022-02-23 16:06:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:41,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:41,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:41,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107755639] [2022-02-23 16:06:41,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107755639] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:41,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671812049] [2022-02-23 16:06:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:41,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:41,447 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) [2022-02-23 16:06:41,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 16:06:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:41,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 16:06:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:41,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:41,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671812049] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:41,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:41,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-02-23 16:06:41,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791292446] [2022-02-23 16:06:41,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:41,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 16:06:41,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:41,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 16:06:41,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-23 16:06:41,713 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:41,846 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-02-23 16:06:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 16:06:41,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-23 16:06:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:41,847 INFO L225 Difference]: With dead ends: 50 [2022-02-23 16:06:41,847 INFO L226 Difference]: Without dead ends: 42 [2022-02-23 16:06:41,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:06:41,849 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:41,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 40 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:06:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-23 16:06:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-02-23 16:06:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-23 16:06:41,854 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2022-02-23 16:06:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:41,854 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-23 16:06:41,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:41,854 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-23 16:06:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 16:06:41,855 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:41,855 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:41,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 16:06:42,071 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 [2022-02-23 16:06:42,072 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash -245336524, now seen corresponding path program 2 times [2022-02-23 16:06:42,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:42,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886003941] [2022-02-23 16:06:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:42,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:42,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:42,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:42,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886003941] [2022-02-23 16:06:42,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886003941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:42,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418290808] [2022-02-23 16:06:42,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:06:42,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:42,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:42,183 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) [2022-02-23 16:06:42,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:06:42,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:06:42,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:06:42,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 16:06:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:42,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:42,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418290808] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:42,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:42,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 16:06:42,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917591267] [2022-02-23 16:06:42,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:42,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 16:06:42,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:42,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 16:06:42,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:06:42,440 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:42,729 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-02-23 16:06:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 16:06:42,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-23 16:06:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:42,733 INFO L225 Difference]: With dead ends: 94 [2022-02-23 16:06:42,733 INFO L226 Difference]: Without dead ends: 80 [2022-02-23 16:06:42,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2022-02-23 16:06:42,736 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:42,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 45 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:06:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-23 16:06:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2022-02-23 16:06:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-02-23 16:06:42,751 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 25 [2022-02-23 16:06:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:42,751 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-02-23 16:06:42,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-02-23 16:06:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-23 16:06:42,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:42,755 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:42,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 16:06:42,971 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 [2022-02-23 16:06:42,972 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash -754687844, now seen corresponding path program 3 times [2022-02-23 16:06:42,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:42,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115089659] [2022-02-23 16:06:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:43,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:43,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:43,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115089659] [2022-02-23 16:06:43,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115089659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:43,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410123437] [2022-02-23 16:06:43,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:06:43,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:43,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:43,145 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) [2022-02-23 16:06:43,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 16:06:43,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-23 16:06:43,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:06:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 16:06:43,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:43,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:43,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410123437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:43,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:43,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-02-23 16:06:43,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447167162] [2022-02-23 16:06:43,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:43,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-23 16:06:43,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:43,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-23 16:06:43,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-02-23 16:06:43,620 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:44,282 INFO L93 Difference]: Finished difference Result 214 states and 248 transitions. [2022-02-23 16:06:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-23 16:06:44,283 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-23 16:06:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:44,284 INFO L225 Difference]: With dead ends: 214 [2022-02-23 16:06:44,284 INFO L226 Difference]: Without dead ends: 188 [2022-02-23 16:06:44,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=876, Invalid=1986, Unknown=0, NotChecked=0, Total=2862 [2022-02-23 16:06:44,286 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 364 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:44,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 40 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:06:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-23 16:06:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 95. [2022-02-23 16:06:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2022-02-23 16:06:44,293 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 37 [2022-02-23 16:06:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:44,293 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2022-02-23 16:06:44,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2022-02-23 16:06:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-23 16:06:44,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:44,296 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:44,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-23 16:06:44,511 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 [2022-02-23 16:06:44,512 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1007083156, now seen corresponding path program 4 times [2022-02-23 16:06:44,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:44,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032336671] [2022-02-23 16:06:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:44,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:44,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:44,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032336671] [2022-02-23 16:06:44,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032336671] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:44,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483778394] [2022-02-23 16:06:44,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 16:06:44,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:44,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:44,903 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) [2022-02-23 16:06:44,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 16:06:44,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 16:06:44,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:06:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 16:06:44,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:45,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:45,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483778394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:45,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:45,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-02-23 16:06:45,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707599484] [2022-02-23 16:06:45,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:45,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-23 16:06:45,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:45,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-23 16:06:45,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=1674, Unknown=0, NotChecked=0, Total=2862 [2022-02-23 16:06:45,940 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 51 states have internal predecessors, (117), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:47,587 INFO L93 Difference]: Finished difference Result 562 states and 632 transitions. [2022-02-23 16:06:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-23 16:06:47,587 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 51 states have internal predecessors, (117), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-23 16:06:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:47,590 INFO L225 Difference]: With dead ends: 562 [2022-02-23 16:06:47,590 INFO L226 Difference]: Without dead ends: 512 [2022-02-23 16:06:47,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3456, Invalid=6846, Unknown=0, NotChecked=0, Total=10302 [2022-02-23 16:06:47,596 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 791 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:47,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 50 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 16:06:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-02-23 16:06:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 179. [2022-02-23 16:06:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.1436781609195403) internal successors, (199), 174 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 203 transitions. [2022-02-23 16:06:47,610 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 203 transitions. Word has length 61 [2022-02-23 16:06:47,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:47,611 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 203 transitions. [2022-02-23 16:06:47,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 51 states have internal predecessors, (117), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:47,611 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 203 transitions. [2022-02-23 16:06:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-23 16:06:47,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:47,614 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:47,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 16:06:47,827 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 [2022-02-23 16:06:47,827 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1177441036, now seen corresponding path program 5 times [2022-02-23 16:06:47,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:47,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15607955] [2022-02-23 16:06:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:47,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:48,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:48,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:48,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15607955] [2022-02-23 16:06:48,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15607955] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:48,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905550785] [2022-02-23 16:06:48,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 16:06:48,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:48,904 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) [2022-02-23 16:06:48,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 16:06:49,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-02-23 16:06:49,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:06:49,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-23 16:06:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:49,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:51,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905550785] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:51,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:51,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-02-23 16:06:51,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399833979] [2022-02-23 16:06:51,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:51,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-23 16:06:51,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-23 16:06:51,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5634, Unknown=0, NotChecked=0, Total=10302 [2022-02-23 16:06:51,811 INFO L87 Difference]: Start difference. First operand 179 states and 203 transitions. Second operand has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 99 states have internal predecessors, (213), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:56,777 INFO L93 Difference]: Finished difference Result 1690 states and 1832 transitions. [2022-02-23 16:06:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-23 16:06:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 99 states have internal predecessors, (213), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-02-23 16:06:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:56,783 INFO L225 Difference]: With dead ends: 1690 [2022-02-23 16:06:56,783 INFO L226 Difference]: Without dead ends: 1592 [2022-02-23 16:06:56,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6531 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13800, Invalid=25206, Unknown=0, NotChecked=0, Total=39006 [2022-02-23 16:06:56,789 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1712 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:56,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1712 Valid, 85 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 16:06:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-02-23 16:06:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 347. [2022-02-23 16:06:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 342 states have (on average 1.1432748538011697) internal successors, (391), 342 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 395 transitions. [2022-02-23 16:06:56,817 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 395 transitions. Word has length 109 [2022-02-23 16:06:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:56,817 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 395 transitions. [2022-02-23 16:06:56,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 99 states have internal predecessors, (213), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 395 transitions. [2022-02-23 16:06:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-02-23 16:06:56,821 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:56,821 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:56,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 16:06:57,027 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 [2022-02-23 16:06:57,028 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:57,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:57,028 INFO L85 PathProgramCache]: Analyzing trace with hash -527993268, now seen corresponding path program 6 times [2022-02-23 16:06:57,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:57,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347883270] [2022-02-23 16:06:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:57,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:59,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:59,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:59,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347883270] [2022-02-23 16:06:59,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347883270] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:59,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310755963] [2022-02-23 16:06:59,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 16:06:59,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:59,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:59,990 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) [2022-02-23 16:06:59,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 16:07:00,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-02-23 16:07:00,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:07:00,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 98 conjunts are in the unsatisfiable core [2022-02-23 16:07:00,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:07:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:00,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:07:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:09,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310755963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:07:09,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:07:09,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-02-23 16:07:09,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425230222] [2022-02-23 16:07:09,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:07:09,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-02-23 16:07:09,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-02-23 16:07:09,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18540, Invalid=20466, Unknown=0, NotChecked=0, Total=39006 [2022-02-23 16:07:09,309 INFO L87 Difference]: Start difference. First operand 347 states and 395 transitions. Second operand has 198 states, 198 states have (on average 2.0454545454545454) internal successors, (405), 195 states have internal predecessors, (405), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:07:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:34,372 INFO L93 Difference]: Finished difference Result 5674 states and 5960 transitions. [2022-02-23 16:07:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-02-23 16:07:34,372 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 2.0454545454545454) internal successors, (405), 195 states have internal predecessors, (405), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-02-23 16:07:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:34,388 INFO L225 Difference]: With dead ends: 5674 [2022-02-23 16:07:34,389 INFO L226 Difference]: Without dead ends: 5480 [2022-02-23 16:07:34,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24603 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=55224, Invalid=96486, Unknown=0, NotChecked=0, Total=151710 [2022-02-23 16:07:34,399 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4316 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 2174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4316 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 3493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2174 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:34,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4316 Valid, 55 Invalid, 3493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2174 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-23 16:07:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2022-02-23 16:07:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 683. [2022-02-23 16:07:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.1430678466076696) internal successors, (775), 678 states have internal predecessors, (775), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:07:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 779 transitions. [2022-02-23 16:07:34,437 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 779 transitions. Word has length 205 [2022-02-23 16:07:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:34,437 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 779 transitions. [2022-02-23 16:07:34,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 2.0454545454545454) internal successors, (405), 195 states have internal predecessors, (405), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:07:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 779 transitions. [2022-02-23 16:07:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-02-23 16:07:34,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:34,444 INFO L514 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:34,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 16:07:34,670 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 [2022-02-23 16:07:34,670 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:34,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1829454644, now seen corresponding path program 7 times [2022-02-23 16:07:34,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:34,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422181507] [2022-02-23 16:07:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:34,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:46,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:46,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:46,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422181507] [2022-02-23 16:07:46,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422181507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:07:46,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777648027] [2022-02-23 16:07:46,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 16:07:46,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:07:46,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:07:46,240 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) [2022-02-23 16:07:46,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 16:07:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:46,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 192 conjunts are in the unsatisfiable core [2022-02-23 16:07:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:08:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:08:09,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 16:08:09,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777648027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:08:09,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 16:08:09,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [196] total 387 [2022-02-23 16:08:09,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460780009] [2022-02-23 16:08:09,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:08:09,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-02-23 16:08:09,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:08:09,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-02-23 16:08:09,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37061, Invalid=112321, Unknown=0, NotChecked=0, Total=149382 [2022-02-23 16:08:09,086 INFO L87 Difference]: Start difference. First operand 683 states and 779 transitions. Second operand has 193 states, 193 states have (on average 2.0362694300518136) internal successors, (393), 193 states have internal predecessors, (393), 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) [2022-02-23 16:08:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:08:11,769 INFO L93 Difference]: Finished difference Result 27952 states and 28052 transitions. [2022-02-23 16:08:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-02-23 16:08:11,769 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0362694300518136) internal successors, (393), 193 states have internal predecessors, (393), 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 397 [2022-02-23 16:08:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:08:11,774 INFO L225 Difference]: With dead ends: 27952 [2022-02-23 16:08:11,775 INFO L226 Difference]: Without dead ends: 1198 [2022-02-23 16:08:11,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36860 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=37061, Invalid=112321, Unknown=0, NotChecked=0, Total=149382 [2022-02-23 16:08:11,782 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 539 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:08:11,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 1193 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:08:11,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-02-23 16:08:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1190. [2022-02-23 16:08:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1185 states have (on average 1.0075949367088608) internal successors, (1194), 1185 states have internal predecessors, (1194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:08:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1198 transitions. [2022-02-23 16:08:11,802 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1198 transitions. Word has length 397 [2022-02-23 16:08:11,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:08:11,802 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 1198 transitions. [2022-02-23 16:08:11,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0362694300518136) internal successors, (393), 193 states have internal predecessors, (393), 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) [2022-02-23 16:08:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1198 transitions. [2022-02-23 16:08:11,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-02-23 16:08:11,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:08:11,809 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:08:11,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 16:08:12,023 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 [2022-02-23 16:08:12,024 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:08:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:08:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -856352636, now seen corresponding path program 1 times [2022-02-23 16:08:12,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:08:12,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435932460] [2022-02-23 16:08:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:08:12,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:08:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:08:23,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:08:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:08:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:08:23,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:08:23,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435932460] [2022-02-23 16:08:23,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435932460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:08:23,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763299036] [2022-02-23 16:08:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:08:23,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:08:23,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:08:23,452 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) [2022-02-23 16:08:23,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 16:08:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:08:23,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 194 conjunts are in the unsatisfiable core [2022-02-23 16:08:23,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:08:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:08:24,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:08:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:08:26,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763299036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:08:26,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:08:26,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 195, 195] total 208 [2022-02-23 16:08:26,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205159820] [2022-02-23 16:08:26,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:08:26,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 208 states [2022-02-23 16:08:26,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:08:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2022-02-23 16:08:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-02-23 16:08:26,426 INFO L87 Difference]: Start difference. First operand 1190 states and 1198 transitions. Second operand has 208 states, 208 states have (on average 2.1153846153846154) internal successors, (440), 205 states have internal predecessors, (440), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:08:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:08:47,956 INFO L93 Difference]: Finished difference Result 2339 states and 2474 transitions. [2022-02-23 16:08:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-02-23 16:08:47,957 INFO L78 Accepts]: Start accepts. Automaton has has 208 states, 208 states have (on average 2.1153846153846154) internal successors, (440), 205 states have internal predecessors, (440), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 397 [2022-02-23 16:08:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:08:47,958 INFO L225 Difference]: With dead ends: 2339 [2022-02-23 16:08:47,958 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 16:08:47,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 782 SyntacticMatches, 2 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22518 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=61129, Invalid=106561, Unknown=0, NotChecked=0, Total=167690 [2022-02-23 16:08:47,967 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1921 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 1334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1921 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1334 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:08:47,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1921 Valid, 68 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1334 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 16:08:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 16:08:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 16:08:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 16:08:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 16:08:47,968 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 397 [2022-02-23 16:08:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:08:47,968 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 16:08:47,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 208 states, 208 states have (on average 2.1153846153846154) internal successors, (440), 205 states have internal predecessors, (440), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:08:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 16:08:47,969 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 16:08:47,971 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 16:08:47,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-23 16:08:48,192 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 [2022-02-23 16:08:48,194 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2022-02-23 16:08:48,195 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 16:08:48,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:08:48 BasicIcfg [2022-02-23 16:08:48,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 16:08:48,197 INFO L158 Benchmark]: Toolchain (without parser) took 128055.60ms. Allocated memory was 176.2MB in the beginning and 942.7MB in the end (delta: 766.5MB). Free memory was 149.9MB in the beginning and 674.2MB in the end (delta: -524.4MB). Peak memory consumption was 242.4MB. Max. memory is 8.0GB. [2022-02-23 16:08:48,198 INFO L158 Benchmark]: CDTParser took 0.56ms. Allocated memory is still 176.2MB. Free memory is still 142.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 16:08:48,198 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.94ms. Allocated memory was 176.2MB in the beginning and 247.5MB in the end (delta: 71.3MB). Free memory was 149.7MB in the beginning and 223.7MB in the end (delta: -74.0MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-02-23 16:08:48,198 INFO L158 Benchmark]: Boogie Preprocessor took 22.18ms. Allocated memory is still 247.5MB. Free memory was 223.7MB in the beginning and 222.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 16:08:48,198 INFO L158 Benchmark]: RCFGBuilder took 307.83ms. Allocated memory is still 247.5MB. Free memory was 222.1MB in the beginning and 211.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-23 16:08:48,198 INFO L158 Benchmark]: IcfgTransformer took 59.02ms. Allocated memory is still 247.5MB. Free memory was 211.6MB in the beginning and 208.2MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2022-02-23 16:08:48,199 INFO L158 Benchmark]: TraceAbstraction took 127456.69ms. Allocated memory was 247.5MB in the beginning and 942.7MB in the end (delta: 695.2MB). Free memory was 207.7MB in the beginning and 674.2MB in the end (delta: -466.6MB). Peak memory consumption was 230.2MB. Max. memory is 8.0GB. [2022-02-23 16:08:48,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 0 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56ms. Allocated memory is still 176.2MB. Free memory is still 142.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.94ms. Allocated memory was 176.2MB in the beginning and 247.5MB in the end (delta: 71.3MB). Free memory was 149.7MB in the beginning and 223.7MB in the end (delta: -74.0MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.18ms. Allocated memory is still 247.5MB. Free memory was 223.7MB in the beginning and 222.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 307.83ms. Allocated memory is still 247.5MB. Free memory was 222.1MB in the beginning and 211.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 59.02ms. Allocated memory is still 247.5MB. Free memory was 211.6MB in the beginning and 208.2MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * TraceAbstraction took 127456.69ms. Allocated memory was 247.5MB in the beginning and 942.7MB in the end (delta: 695.2MB). Free memory was 207.7MB in the beginning and 674.2MB in the end (delta: -466.6MB). Peak memory consumption was 230.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 127.4s, OverallIterations: 10, TraceHistogramMax: 191, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 57.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9883 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9882 mSDsluCounter, 1637 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1300 mSDsCounter, 4981 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4746 IncrementalHoareTripleChecker+Invalid, 9727 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4981 mSolverCounterUnsat, 337 mSDtfsCounter, 4746 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3302 GetRequests, 1713 SyntacticMatches, 8 SemanticMatches, 1581 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93085 ImplicationChecksByTransitivity, 89.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1190occurred in iteration=9, InterpolantAutomatonStates: 803, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 6516 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 66.2s InterpolantComputationTime, 2532 NumberOfCodeBlocks, 2532 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 3360 ConstructedInterpolants, 0 QuantifiedInterpolants, 9782 SizeOfPredicates, 7 NumberOfNonLiveVariables, 4730 ConjunctsInSsa, 587 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 36290/162586 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 16:08:48,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...