/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-acceleration/phases_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 00:23:53,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 00:23:53,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 00:23:53,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 00:23:53,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 00:23:53,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 00:23:53,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 00:23:53,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 00:23:53,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 00:23:53,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 00:23:53,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 00:23:53,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 00:23:53,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 00:23:53,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 00:23:53,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 00:23:53,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 00:23:53,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 00:23:53,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 00:23:53,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 00:23:53,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 00:23:53,140 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 00:23:53,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 00:23:53,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 00:23:53,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 00:23:53,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 00:23:53,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-05 00:23:53,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-05 00:23:53,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-05 00:23:53,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-05 00:23:53,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-05 00:23:53,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-05 00:23:53,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-05 00:23:53,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-05 00:23:53,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-05 00:23:53,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-05 00:23:53,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-05 00:23:53,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-05 00:23:53,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-05 00:23:53,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-05 00:23:53,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 00:23:53,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 00:23:53,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 00:23:53,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 00:23:53,186 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 00:23:53,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 00:23:53,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 00:23:53,188 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 00:23:53,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 00:23:53,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 00:23:53,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 00:23:53,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 00:23:53,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 00:23:53,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 00:23:53,190 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 00:23:53,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 00:23:53,190 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 00:23:53,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 00:23:53,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 00:23:53,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 00:23:53,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 00:23:53,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 00:23:53,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:23:53,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 00:23:53,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 00:23:53,192 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 00:23:53,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 00:23:53,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 00:23:53,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 00:23:53,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 00:23:53,456 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 00:23:53,458 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 00:23:53,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-1.c [2022-04-05 00:23:53,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8b775a77/b6eb7ed6dd8744c79c812bbc748b6a46/FLAG8f301f7f5 [2022-04-05 00:23:53,927 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 00:23:53,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-1.c [2022-04-05 00:23:53,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8b775a77/b6eb7ed6dd8744c79c812bbc748b6a46/FLAG8f301f7f5 [2022-04-05 00:23:53,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8b775a77/b6eb7ed6dd8744c79c812bbc748b6a46 [2022-04-05 00:23:53,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 00:23:53,948 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 00:23:53,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 00:23:53,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 00:23:53,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 00:23:53,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:23:53" (1/1) ... [2022-04-05 00:23:53,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b03e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:53, skipping insertion in model container [2022-04-05 00:23:53,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:23:53" (1/1) ... [2022-04-05 00:23:53,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 00:23:53,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 00:23:54,137 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-acceleration/phases_1-1.c[322,335] [2022-04-05 00:23:54,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:23:54,175 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 00:23:54,188 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-acceleration/phases_1-1.c[322,335] [2022-04-05 00:23:54,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:23:54,204 INFO L208 MainTranslator]: Completed translation [2022-04-05 00:23:54,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:54 WrapperNode [2022-04-05 00:23:54,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 00:23:54,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 00:23:54,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 00:23:54,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 00:23:54,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:54" (1/1) ... [2022-04-05 00:23:54,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:54" (1/1) ... [2022-04-05 00:23:54,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:54" (1/1) ... [2022-04-05 00:23:54,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:54" (1/1) ... [2022-04-05 00:23:54,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:54" (1/1) ... [2022-04-05 00:23:54,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:54" (1/1) ... [2022-04-05 00:23:54,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:54" (1/1) ... [2022-04-05 00:23:54,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 00:23:54,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 00:23:54,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 00:23:54,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 00:23:54,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:54" (1/1) ... [2022-04-05 00:23:54,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:23:54,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:23:54,284 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) [2022-04-05 00:23:54,295 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 [2022-04-05 00:23:54,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 00:23:54,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 00:23:54,322 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 00:23:54,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 00:23:54,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 00:23:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 00:23:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 00:23:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 00:23:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 00:23:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 00:23:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 00:23:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 00:23:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 00:23:54,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 00:23:54,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 00:23:54,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 00:23:54,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 00:23:54,376 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 00:23:54,377 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 00:23:54,457 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 00:23:54,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 00:23:54,463 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 00:23:54,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:23:54 BoogieIcfgContainer [2022-04-05 00:23:54,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 00:23:54,465 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 00:23:54,466 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 00:23:54,470 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 00:23:54,474 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:23:54" (1/1) ... [2022-04-05 00:23:54,475 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 00:23:54,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:23:54 BasicIcfg [2022-04-05 00:23:54,487 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 00:23:54,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 00:23:54,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 00:23:54,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 00:23:54,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 12:23:53" (1/4) ... [2022-04-05 00:23:54,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13150ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:23:54, skipping insertion in model container [2022-04-05 00:23:54,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:23:54" (2/4) ... [2022-04-05 00:23:54,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13150ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:23:54, skipping insertion in model container [2022-04-05 00:23:54,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:23:54" (3/4) ... [2022-04-05 00:23:54,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13150ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 12:23:54, skipping insertion in model container [2022-04-05 00:23:54,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:23:54" (4/4) ... [2022-04-05 00:23:54,498 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-1.cJordan [2022-04-05 00:23:54,504 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 00:23:54,504 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 00:23:54,557 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 00:23:54,573 INFO L340 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 [2022-04-05 00:23:54,574 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 00:23:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-04-05 00:23:54,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 00:23:54,609 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:23:54,610 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:23:54,610 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:23:54,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:23:54,622 INFO L85 PathProgramCache]: Analyzing trace with hash -756157467, now seen corresponding path program 1 times [2022-04-05 00:23:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:23:54,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367348733] [2022-04-05 00:23:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:23:54,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:23:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:54,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:23:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:54,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:23:54,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367348733] [2022-04-05 00:23:54,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367348733] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:23:54,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:23:54,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 00:23:54,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306113439] [2022-04-05 00:23:54,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:23:54,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 00:23:54,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:23:54,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 00:23:54,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 00:23:54,876 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-05 00:23:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:23:54,903 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-04-05 00:23:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 00:23:54,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-04-05 00:23:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:23:54,912 INFO L225 Difference]: With dead ends: 19 [2022-04-05 00:23:54,912 INFO L226 Difference]: Without dead ends: 13 [2022-04-05 00:23:54,914 INFO L912 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 [2022-04-05 00:23:54,918 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 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 [2022-04-05 00:23:54,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 00:23:54,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-05 00:23:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-05 00:23:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-04-05 00:23:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-04-05 00:23:54,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-04-05 00:23:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:23:54,947 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-04-05 00:23:54,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-05 00:23:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-04-05 00:23:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 00:23:54,948 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:23:54,948 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:23:54,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 00:23:54,949 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:23:54,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:23:54,950 INFO L85 PathProgramCache]: Analyzing trace with hash -755233946, now seen corresponding path program 1 times [2022-04-05 00:23:54,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:23:54,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142959280] [2022-04-05 00:23:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:23:54,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:23:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:55,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:23:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:55,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:23:55,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142959280] [2022-04-05 00:23:55,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142959280] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:23:55,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:23:55,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 00:23:55,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000782614] [2022-04-05 00:23:55,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:23:55,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 00:23:55,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:23:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 00:23:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 00:23:55,040 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-04-05 00:23:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:23:55,081 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-04-05 00:23:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 00:23:55,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-04-05 00:23:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:23:55,082 INFO L225 Difference]: With dead ends: 15 [2022-04-05 00:23:55,083 INFO L226 Difference]: Without dead ends: 15 [2022-04-05 00:23:55,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 00:23:55,084 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 00:23:55,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 00:23:55,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-05 00:23:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-05 00:23:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-04-05 00:23:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-04-05 00:23:55,089 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-04-05 00:23:55,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:23:55,089 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-04-05 00:23:55,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-04-05 00:23:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-04-05 00:23:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 00:23:55,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:23:55,090 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:23:55,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 00:23:55,091 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:23:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:23:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash 980092676, now seen corresponding path program 1 times [2022-04-05 00:23:55,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:23:55,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627200640] [2022-04-05 00:23:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:23:55,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:23:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:55,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:23:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:55,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:23:55,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627200640] [2022-04-05 00:23:55,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627200640] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:23:55,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336486400] [2022-04-05 00:23:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:23:55,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:23:55,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:23:55,219 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) [2022-04-05 00:23:55,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 00:23:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 00:23:55,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:23:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:55,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:23:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:55,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336486400] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:23:55,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:23:55,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-05 00:23:55,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059680154] [2022-04-05 00:23:55,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:23:55,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 00:23:55,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:23:55,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 00:23:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-05 00:23:55,434 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:23:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:23:55,572 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-05 00:23:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 00:23:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-05 00:23:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:23:55,574 INFO L225 Difference]: With dead ends: 19 [2022-04-05 00:23:55,574 INFO L226 Difference]: Without dead ends: 19 [2022-04-05 00:23:55,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-04-05 00:23:55,575 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:23:55,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 00:23:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-05 00:23:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-04-05 00:23:55,578 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) [2022-04-05 00:23:55,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-05 00:23:55,579 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-04-05 00:23:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:23:55,580 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-05 00:23:55,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:23:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-05 00:23:55,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 00:23:55,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:23:55,581 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:23:55,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 00:23:55,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:23:55,782 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:23:55,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:23:55,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1575643231, now seen corresponding path program 1 times [2022-04-05 00:23:55,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:23:55,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387133105] [2022-04-05 00:23:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:23:55,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:23:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:55,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:23:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:55,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:23:55,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387133105] [2022-04-05 00:23:55,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387133105] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:23:55,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256263833] [2022-04-05 00:23:55,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:23:55,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:23:55,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:23:55,936 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) [2022-04-05 00:23:55,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 00:23:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:55,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 00:23:55,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:23:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:56,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:23:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 00:23:56,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256263833] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:23:56,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:23:56,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 12 [2022-04-05 00:23:56,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701527744] [2022-04-05 00:23:56,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:23:56,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 00:23:56,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:23:56,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 00:23:56,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-05 00:23:56,207 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 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) [2022-04-05 00:23:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:23:56,374 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-05 00:23:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 00:23:56,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 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 17 [2022-04-05 00:23:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:23:56,377 INFO L225 Difference]: With dead ends: 26 [2022-04-05 00:23:56,377 INFO L226 Difference]: Without dead ends: 23 [2022-04-05 00:23:56,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-04-05 00:23:56,383 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:23:56,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 00:23:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-05 00:23:56,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-04-05 00:23:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-04-05 00:23:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-04-05 00:23:56,391 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-04-05 00:23:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:23:56,391 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-04-05 00:23:56,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 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) [2022-04-05 00:23:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-04-05 00:23:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-05 00:23:56,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:23:56,392 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:23:56,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 00:23:56,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-05 00:23:56,593 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:23:56,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:23:56,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1560917373, now seen corresponding path program 2 times [2022-04-05 00:23:56,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:23:56,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937789495] [2022-04-05 00:23:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:23:56,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:23:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:56,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:23:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:56,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:23:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937789495] [2022-04-05 00:23:56,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937789495] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:23:56,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944379264] [2022-04-05 00:23:56,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 00:23:56,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:23:56,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:23:56,719 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) [2022-04-05 00:23:56,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 00:23:56,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 00:23:56,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:23:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 00:23:56,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:23:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:56,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:23:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:57,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944379264] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:23:57,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:23:57,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2022-04-05 00:23:57,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173263948] [2022-04-05 00:23:57,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:23:57,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 00:23:57,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:23:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 00:23:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-05 00:23:57,013 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:23:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:23:57,444 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-04-05 00:23:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 00:23:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-05 00:23:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:23:57,445 INFO L225 Difference]: With dead ends: 32 [2022-04-05 00:23:57,445 INFO L226 Difference]: Without dead ends: 32 [2022-04-05 00:23:57,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2022-04-05 00:23:57,447 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:23:57,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 00:23:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-05 00:23:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-05 00:23:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 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) [2022-04-05 00:23:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-04-05 00:23:57,451 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2022-04-05 00:23:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:23:57,451 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-04-05 00:23:57,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:23:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-04-05 00:23:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 00:23:57,453 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:23:57,453 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:23:57,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 00:23:57,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:23:57,670 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:23:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:23:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash 838082225, now seen corresponding path program 3 times [2022-04-05 00:23:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:23:57,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232687747] [2022-04-05 00:23:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:23:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:23:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:57,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:23:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:57,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:23:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232687747] [2022-04-05 00:23:57,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232687747] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:23:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834821846] [2022-04-05 00:23:57,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 00:23:57,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:23:57,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:23:57,891 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) [2022-04-05 00:23:57,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 00:23:57,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 00:23:57,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:23:57,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 00:23:57,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:23:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-05 00:23:58,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:23:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-05 00:23:58,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834821846] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:23:58,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:23:58,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 17 [2022-04-05 00:23:58,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748624364] [2022-04-05 00:23:58,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:23:58,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 00:23:58,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:23:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 00:23:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-04-05 00:23:58,137 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:23:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:23:58,546 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-04-05 00:23:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-05 00:23:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-05 00:23:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:23:58,548 INFO L225 Difference]: With dead ends: 53 [2022-04-05 00:23:58,548 INFO L226 Difference]: Without dead ends: 53 [2022-04-05 00:23:58,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2022-04-05 00:23:58,549 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:23:58,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 33 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 00:23:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-05 00:23:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2022-04-05 00:23:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 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) [2022-04-05 00:23:58,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-05 00:23:58,554 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 31 [2022-04-05 00:23:58,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:23:58,555 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-05 00:23:58,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:23:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-05 00:23:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 00:23:58,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:23:58,556 INFO L499 BasicCegarLoop]: trace histogram [15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:23:58,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 00:23:58,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:23:58,770 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:23:58,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:23:58,771 INFO L85 PathProgramCache]: Analyzing trace with hash 890325540, now seen corresponding path program 4 times [2022-04-05 00:23:58,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:23:58,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717228401] [2022-04-05 00:23:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:23:58,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:23:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:59,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:23:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:23:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 132 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 00:23:59,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:23:59,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717228401] [2022-04-05 00:23:59,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717228401] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:23:59,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680872126] [2022-04-05 00:23:59,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 00:23:59,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:23:59,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:23:59,025 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) [2022-04-05 00:23:59,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 00:23:59,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 00:23:59,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:23:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 00:23:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:23:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:59,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:23:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:23:59,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680872126] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:23:59,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:23:59,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 36 [2022-04-05 00:23:59,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735436797] [2022-04-05 00:23:59,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:23:59,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-05 00:23:59,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:23:59,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-05 00:23:59,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2022-04-05 00:23:59,877 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:24:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:24:10,808 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2022-04-05 00:24:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 00:24:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-05 00:24:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:24:10,810 INFO L225 Difference]: With dead ends: 77 [2022-04-05 00:24:10,810 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 00:24:10,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=875, Invalid=2430, Unknown=1, NotChecked=0, Total=3306 [2022-04-05 00:24:10,812 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 00:24:10,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 00:24:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 00:24:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2022-04-05 00:24:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 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) [2022-04-05 00:24:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-04-05 00:24:10,819 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 41 [2022-04-05 00:24:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:24:10,819 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-04-05 00:24:10,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:24:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-04-05 00:24:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-05 00:24:10,820 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:24:10,821 INFO L499 BasicCegarLoop]: trace histogram [23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:24:10,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 00:24:11,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:24:11,036 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:24:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:24:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash -422126962, now seen corresponding path program 5 times [2022-04-05 00:24:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:24:11,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876309466] [2022-04-05 00:24:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:24:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:24:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:11,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:24:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-05 00:24:11,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:24:11,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876309466] [2022-04-05 00:24:11,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876309466] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:24:11,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204107710] [2022-04-05 00:24:11,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 00:24:11,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:24:11,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:24:11,318 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) [2022-04-05 00:24:11,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 00:24:12,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-04-05 00:24:12,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:24:12,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-05 00:24:12,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:24:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 140 proven. 380 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 00:24:13,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:24:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 140 proven. 380 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 00:24:14,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204107710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:24:14,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:24:14,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 23] total 45 [2022-04-05 00:24:14,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932129441] [2022-04-05 00:24:14,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:24:14,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 00:24:14,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:24:14,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 00:24:14,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1437, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 00:24:14,250 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:25:27,128 WARN L232 SmtUtils]: Spent 10.94s on a formula simplification. DAG size of input: 149 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 00:25:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:25:27,170 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2022-04-05 00:25:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 00:25:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-05 00:25:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:25:27,172 INFO L225 Difference]: With dead ends: 102 [2022-04-05 00:25:27,172 INFO L226 Difference]: Without dead ends: 102 [2022-04-05 00:25:27,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=1705, Invalid=4615, Unknown=0, NotChecked=0, Total=6320 [2022-04-05 00:25:27,174 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 00:25:27,174 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 114 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 00:25:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-05 00:25:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-05 00:25:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.1237113402061856) internal successors, (109), 97 states have internal predecessors, (109), 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) [2022-04-05 00:25:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2022-04-05 00:25:27,183 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 57 [2022-04-05 00:25:27,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:25:27,183 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2022-04-05 00:25:27,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:25:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2022-04-05 00:25:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-05 00:25:27,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:25:27,186 INFO L499 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:25:27,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 00:25:27,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:25:27,392 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:25:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:25:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash -759620958, now seen corresponding path program 6 times [2022-04-05 00:25:27,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:25:27,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443574386] [2022-04-05 00:25:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:25:27,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:25:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:25:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-05 00:25:28,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:25:28,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443574386] [2022-04-05 00:25:28,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443574386] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:25:28,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371697034] [2022-04-05 00:25:28,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 00:25:28,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:25:28,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:25:28,280 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) [2022-04-05 00:25:28,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 00:25:42,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-04-05 00:25:42,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:25:42,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-05 00:25:42,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:25:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 953 proven. 470 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-04-05 00:25:43,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:25:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 735 proven. 100 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-05 00:25:47,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371697034] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:25:47,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:25:47,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 22, 17] total 74 [2022-04-05 00:25:47,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524213686] [2022-04-05 00:25:47,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:25:47,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-05 00:25:47,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:25:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-05 00:25:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1358, Invalid=4044, Unknown=0, NotChecked=0, Total=5402 [2022-04-05 00:25:47,499 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:26:03,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:26:03,886 INFO L93 Difference]: Finished difference Result 165 states and 187 transitions. [2022-04-05 00:26:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-05 00:26:03,887 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-05 00:26:03,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:26:03,887 INFO L225 Difference]: With dead ends: 165 [2022-04-05 00:26:03,887 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 00:26:03,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=3276, Invalid=14280, Unknown=0, NotChecked=0, Total=17556 [2022-04-05 00:26:03,892 INFO L913 BasicCegarLoop]: 7 mSDtfsCounter, 138 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-05 00:26:03,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 124 Invalid, 3217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 2894 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-05 00:26:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 00:26:03,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 00:26:03,893 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) [2022-04-05 00:26:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 00:26:03,894 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2022-04-05 00:26:03,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:26:03,894 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 00:26:03,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:26:03,894 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 00:26:03,894 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 00:26:03,897 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 00:26:03,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 00:26:04,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:26:04,110 INFO L719 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2022-04-05 00:26:04,112 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 00:26:04,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 12:26:04 BasicIcfg [2022-04-05 00:26:04,114 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 00:26:04,114 INFO L158 Benchmark]: Toolchain (without parser) took 130166.50ms. Allocated memory was 179.3MB in the beginning and 226.5MB in the end (delta: 47.2MB). Free memory was 123.1MB in the beginning and 68.2MB in the end (delta: 54.9MB). Peak memory consumption was 102.1MB. Max. memory is 8.0GB. [2022-04-05 00:26:04,114 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 179.3MB. Free memory is still 139.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 00:26:04,115 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.25ms. Allocated memory was 179.3MB in the beginning and 226.5MB in the end (delta: 47.2MB). Free memory was 154.0MB in the beginning and 199.0MB in the end (delta: -45.0MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-04-05 00:26:04,115 INFO L158 Benchmark]: Boogie Preprocessor took 41.37ms. Allocated memory is still 226.5MB. Free memory was 199.0MB in the beginning and 197.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 00:26:04,115 INFO L158 Benchmark]: RCFGBuilder took 215.96ms. Allocated memory is still 226.5MB. Free memory was 197.6MB in the beginning and 188.1MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-05 00:26:04,115 INFO L158 Benchmark]: IcfgTransformer took 22.15ms. Allocated memory is still 226.5MB. Free memory was 187.7MB in the beginning and 186.6MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 00:26:04,116 INFO L158 Benchmark]: TraceAbstraction took 129624.43ms. Allocated memory is still 226.5MB. Free memory was 186.4MB in the beginning and 68.2MB in the end (delta: 118.2MB). Peak memory consumption was 119.3MB. Max. memory is 8.0GB. [2022-04-05 00:26:04,117 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 179.3MB. Free memory is still 139.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 245.25ms. Allocated memory was 179.3MB in the beginning and 226.5MB in the end (delta: 47.2MB). Free memory was 154.0MB in the beginning and 199.0MB in the end (delta: -45.0MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.37ms. Allocated memory is still 226.5MB. Free memory was 199.0MB in the beginning and 197.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 215.96ms. Allocated memory is still 226.5MB. Free memory was 197.6MB in the beginning and 188.1MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 22.15ms. Allocated memory is still 226.5MB. Free memory was 187.7MB in the beginning and 186.6MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 129624.43ms. Allocated memory is still 226.5MB. Free memory was 186.4MB in the beginning and 68.2MB in the end (delta: 118.2MB). Peak memory consumption was 119.3MB. 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: 7]: 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, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 129.6s, OverallIterations: 9, TraceHistogramMax: 45, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 101.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 378 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 377 mSDsluCounter, 525 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 419 mSDsCounter, 887 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4595 IncrementalHoareTripleChecker+Invalid, 5482 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 887 mSolverCounterUnsat, 106 mSDtfsCounter, 4595 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 843 GetRequests, 485 SyntacticMatches, 12 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3623 ImplicationChecksByTransitivity, 104.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred in iteration=8, InterpolantAutomatonStates: 179, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 32 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 15.5s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 580 NumberOfCodeBlocks, 560 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 836 ConstructedInterpolants, 0 QuantifiedInterpolants, 4190 SizeOfPredicates, 6 NumberOfNonLiveVariables, 721 ConjunctsInSsa, 172 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 5210/8715 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! [2022-04-05 00:26:04,144 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...