/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/nla-digbench-scaling/dijkstra-u_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:08:44,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:08:44,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:08:44,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 22:08:44,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 22:08:44,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 22:08:44,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 22:08:44,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 22:08:44,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 22:08:44,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 22:08:44,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 22:08:44,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 22:08:44,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:08:44,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:08:44,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:08:44,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:08:44,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:08:44,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:08:44,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:08:44,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:08:44,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:08:44,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:08:44,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:08:44,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:08:44,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 22:08:44,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 22:08:44,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 22:08:45,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 22:08:45,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 22:08:45,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 22:08:45,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 22:08:45,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 22:08:45,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 22:08:45,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:08:45,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:08:45,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:08:45,005 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:08:45,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:08:45,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:08:45,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:08:45,016 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:08:45,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:08:45,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:08:45,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:08:45,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:08:45,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:08:45,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:08:45,017 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:08:45,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:08:45,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:08:45,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:08:45,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:08:45,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:08:45,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:08:45,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:08:45,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:08:45,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:08:45,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:08:45,019 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:08:45,019 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:08:45,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:08:45,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:08:45,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:08:45,200 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:08:45,200 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:08:45,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c [2022-02-14 22:08:45,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb9c33a0/60d995843f7d4c2aa32691d9feb2a066/FLAGd0681cdae [2022-02-14 22:08:45,581 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:08:45,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c [2022-02-14 22:08:45,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb9c33a0/60d995843f7d4c2aa32691d9feb2a066/FLAGd0681cdae [2022-02-14 22:08:46,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb9c33a0/60d995843f7d4c2aa32691d9feb2a066 [2022-02-14 22:08:46,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:08:46,022 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:08:46,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:08:46,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:08:46,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:08:46,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e45ee7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46, skipping insertion in model container [2022-02-14 22:08:46,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:08:46,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:08:46,148 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c[525,538] [2022-02-14 22:08:46,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:08:46,169 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:08:46,176 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c[525,538] [2022-02-14 22:08:46,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:08:46,193 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:08:46,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46 WrapperNode [2022-02-14 22:08:46,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:08:46,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:08:46,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:08:46,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:08:46,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:08:46,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:08:46,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:08:46,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:08:46,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:08:46,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:08:46,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 22:08:46,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-14 22:08:46,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:08:46,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:08:46,268 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:08:46,268 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:08:46,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:08:46,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:08:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:08:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:08:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:08:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:08:46,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 22:08:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:08:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:08:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:08:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:08:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:08:46,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:08:46,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:08:46,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:08:46,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:08:46,306 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:08:46,307 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:08:46,466 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:08:46,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:08:46,470 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 22:08:46,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:08:46 BoogieIcfgContainer [2022-02-14 22:08:46,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:08:46,472 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:08:46,472 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:08:46,473 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:08:46,474 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:08:46" (1/1) ... [2022-02-14 22:08:46,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:08:46 BasicIcfg [2022-02-14 22:08:46,489 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:08:46,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:08:46,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:08:46,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:08:46,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:08:46" (1/4) ... [2022-02-14 22:08:46,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e94240a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:08:46, skipping insertion in model container [2022-02-14 22:08:46,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:46" (2/4) ... [2022-02-14 22:08:46,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e94240a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:08:46, skipping insertion in model container [2022-02-14 22:08:46,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:08:46" (3/4) ... [2022-02-14 22:08:46,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e94240a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:08:46, skipping insertion in model container [2022-02-14 22:08:46,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:08:46" (4/4) ... [2022-02-14 22:08:46,499 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound100.cJordan [2022-02-14 22:08:46,502 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:08:46,503 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:08:46,529 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:08:46,534 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 22:08:46,534 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:08:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 22:08:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 22:08:46,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:08:46,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:08:46,547 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:08:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:08:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-02-14 22:08:46,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:08:46,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614730992] [2022-02-14 22:08:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:08:46,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:08:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:46,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:08:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:46,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:08:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:46,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 22:08:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:08:46,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:08:46,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614730992] [2022-02-14 22:08:46,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614730992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:08:46,665 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:08:46,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 22:08:46,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410276104] [2022-02-14 22:08:46,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:08:46,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 22:08:46,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:08:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 22:08:46,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:08:46,687 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:08:48,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:50,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:08:51,073 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-02-14 22:08:51,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 22:08:51,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-14 22:08:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:08:51,079 INFO L225 Difference]: With dead ends: 38 [2022-02-14 22:08:51,079 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 22:08:51,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:08:51,082 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-14 22:08:51,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 9 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-02-14 22:08:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 22:08:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-14 22:08:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 22:08:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-02-14 22:08:51,106 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-02-14 22:08:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:08:51,106 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-02-14 22:08:51,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:08:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-02-14 22:08:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-14 22:08:51,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:08:51,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:08:51,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 22:08:51,108 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:08:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:08:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-02-14 22:08:51,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:08:51,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57848397] [2022-02-14 22:08:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:08:51,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:08:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:51,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:08:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:51,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:08:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 22:08:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:08:51,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:08:51,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57848397] [2022-02-14 22:08:51,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57848397] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:08:51,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:08:51,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 22:08:51,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92953695] [2022-02-14 22:08:51,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:08:51,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 22:08:51,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:08:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 22:08:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-14 22:08:51,320 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:08:56,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:59,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:09:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:09:00,149 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-02-14 22:09:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:09:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-02-14 22:09:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:09:00,151 INFO L225 Difference]: With dead ends: 50 [2022-02-14 22:09:00,151 INFO L226 Difference]: Without dead ends: 48 [2022-02-14 22:09:00,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:09:00,152 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 54 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-02-14 22:09:00,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 51 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 192 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2022-02-14 22:09:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-14 22:09:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-14 22:09:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 22:09:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-02-14 22:09:00,172 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-02-14 22:09:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:09:00,173 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-02-14 22:09:00,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:09:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-02-14 22:09:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-14 22:09:00,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:09:00,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:09:00,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 22:09:00,174 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:09:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:09:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-02-14 22:09:00,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:09:00,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489165495] [2022-02-14 22:09:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:09:00,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:09:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:09:00,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:09:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:09:00,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:09:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:09:00,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 22:09:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:09:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-14 22:09:00,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:09:00,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489165495] [2022-02-14 22:09:00,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489165495] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:09:00,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:09:00,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 22:09:00,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74953929] [2022-02-14 22:09:00,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:09:00,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 22:09:00,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:09:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 22:09:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-14 22:09:00,365 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:09:02,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:05,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:07,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:09:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:09:09,151 INFO L93 Difference]: Finished difference Result 74 states and 109 transitions. [2022-02-14 22:09:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:09:09,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-02-14 22:09:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:09:09,158 INFO L225 Difference]: With dead ends: 74 [2022-02-14 22:09:09,158 INFO L226 Difference]: Without dead ends: 72 [2022-02-14 22:09:09,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:09:09,162 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 69 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-02-14 22:09:09,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 55 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 232 Invalid, 3 Unknown, 0 Unchecked, 8.7s Time] [2022-02-14 22:09:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-14 22:09:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-02-14 22:09:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 32 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-14 22:09:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 100 transitions. [2022-02-14 22:09:09,178 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 100 transitions. Word has length 26 [2022-02-14 22:09:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:09:09,178 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 100 transitions. [2022-02-14 22:09:09,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 22:09:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 100 transitions. [2022-02-14 22:09:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-14 22:09:09,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:09:09,180 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:09:09,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 22:09:09,180 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:09:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:09:09,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-02-14 22:09:09,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:09:09,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142848856] [2022-02-14 22:09:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:09:09,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:09:09,192 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:09:09,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155021964] [2022-02-14 22:09:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:09:09,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:09:09,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:09:09,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:09:09,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 22:09:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:09:09,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:09:09,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:09:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-14 22:09:09,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:09:09,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:09:09,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142848856] [2022-02-14 22:09:09,481 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:09:09,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155021964] [2022-02-14 22:09:09,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155021964] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:09:09,481 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:09:09,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:09:09,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318970582] [2022-02-14 22:09:09,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:09:09,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:09:09,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:09:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:09:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:09:09,483 INFO L87 Difference]: Start difference. First operand 69 states and 100 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:09:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:09:10,752 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2022-02-14 22:09:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:09:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-02-14 22:09:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:09:10,754 INFO L225 Difference]: With dead ends: 78 [2022-02-14 22:09:10,754 INFO L226 Difference]: Without dead ends: 57 [2022-02-14 22:09:10,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:09:10,755 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-14 22:09:10,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-14 22:09:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-14 22:09:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-14 22:09:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 26 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-14 22:09:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2022-02-14 22:09:10,761 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 34 [2022-02-14 22:09:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:09:10,761 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2022-02-14 22:09:10,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:09:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2022-02-14 22:09:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-14 22:09:10,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:09:10,762 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:09:10,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 22:09:10,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:09:10,967 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:09:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:09:10,967 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-02-14 22:09:10,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:09:10,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113070178] [2022-02-14 22:09:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:09:10,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:09:10,978 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:09:10,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461953601] [2022-02-14 22:09:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:09:10,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:09:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:09:10,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:09:10,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 22:09:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:09:11,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:09:11,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:09:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-14 22:09:11,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:09:11,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:09:11,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113070178] [2022-02-14 22:09:11,158 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:09:11,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461953601] [2022-02-14 22:09:11,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461953601] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:09:11,159 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:09:11,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:09:11,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105580161] [2022-02-14 22:09:11,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:09:11,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:09:11,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:09:11,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:09:11,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:09:11,160 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:09:13,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:09:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:09:13,781 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2022-02-14 22:09:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:09:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-14 22:09:13,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:09:13,783 INFO L225 Difference]: With dead ends: 68 [2022-02-14 22:09:13,783 INFO L226 Difference]: Without dead ends: 67 [2022-02-14 22:09:13,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:09:13,784 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-14 22:09:13,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 169 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-02-14 22:09:13,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-14 22:09:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-14 22:09:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 22:09:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-02-14 22:09:13,790 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 36 [2022-02-14 22:09:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:09:13,790 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-02-14 22:09:13,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:09:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-02-14 22:09:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-14 22:09:13,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:09:13,792 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:09:13,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 22:09:13,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:09:14,000 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:09:14,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:09:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-02-14 22:09:14,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:09:14,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150204833] [2022-02-14 22:09:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:09:14,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:09:14,025 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:09:14,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241392907] [2022-02-14 22:09:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:09:14,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:09:14,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:09:14,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:09:14,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process