/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/cohencu-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 18:30:39,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 18:30:39,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 18:30:39,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 18:30:39,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 18:30:39,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 18:30:39,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 18:30:39,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 18:30:39,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 18:30:39,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 18:30:39,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 18:30:39,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 18:30:39,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 18:30:39,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 18:30:39,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 18:30:39,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 18:30:39,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 18:30:39,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 18:30:39,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 18:30:39,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 18:30:39,319 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 18:30:39,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 18:30:39,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 18:30:39,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 18:30:39,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 18:30:39,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 18:30:39,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 18:30:39,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 18:30:39,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 18:30:39,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 18:30:39,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 18:30:39,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 18:30:39,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 18:30:39,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 18:30:39,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 18:30:39,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 18:30:39,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 18:30:39,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 18:30:39,341 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 18:30:39,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 18:30:39,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 18:30:39,344 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 18:30:39,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 18:30:39,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 18:30:39,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 18:30:39,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 18:30:39,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 18:30:39,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 18:30:39,345 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 18:30:39,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 18:30:39,345 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 18:30:39,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 18:30:39,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 18:30:39,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 18:30:39,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 18:30:39,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 18:30:39,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:30:39,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 18:30:39,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 18:30:39,346 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 18:30:39,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 18:30:39,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 18:30:39,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 18:30:39,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 18:30:39,541 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 18:30:39,541 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 18:30:39,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound2.c [2022-03-18 18:30:39,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23d616b1/749c2b29f7604299947f24d9ec32e5f4/FLAGd3b366eff [2022-03-18 18:30:39,960 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 18:30:39,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound2.c [2022-03-18 18:30:39,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23d616b1/749c2b29f7604299947f24d9ec32e5f4/FLAGd3b366eff [2022-03-18 18:30:39,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23d616b1/749c2b29f7604299947f24d9ec32e5f4 [2022-03-18 18:30:39,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 18:30:39,975 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 18:30:39,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 18:30:39,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 18:30:39,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 18:30:39,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:30:39" (1/1) ... [2022-03-18 18:30:39,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b48a776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:39, skipping insertion in model container [2022-03-18 18:30:39,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:30:39" (1/1) ... [2022-03-18 18:30:39,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 18:30:39,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 18:30:40,124 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/cohencu-ll_unwindbound2.c[588,601] [2022-03-18 18:30:40,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:30:40,162 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 18:30:40,173 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/cohencu-ll_unwindbound2.c[588,601] [2022-03-18 18:30:40,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:30:40,201 INFO L208 MainTranslator]: Completed translation [2022-03-18 18:30:40,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:40 WrapperNode [2022-03-18 18:30:40,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 18:30:40,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 18:30:40,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 18:30:40,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 18:30:40,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:40" (1/1) ... [2022-03-18 18:30:40,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:40" (1/1) ... [2022-03-18 18:30:40,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:40" (1/1) ... [2022-03-18 18:30:40,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:40" (1/1) ... [2022-03-18 18:30:40,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:40" (1/1) ... [2022-03-18 18:30:40,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:40" (1/1) ... [2022-03-18 18:30:40,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:40" (1/1) ... [2022-03-18 18:30:40,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 18:30:40,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 18:30:40,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 18:30:40,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 18:30:40,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:40" (1/1) ... [2022-03-18 18:30:40,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:30:40,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:30:40,267 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) [2022-03-18 18:30:40,287 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 [2022-03-18 18:30:40,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 18:30:40,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 18:30:40,298 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 18:30:40,299 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 18:30:40,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 18:30:40,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 18:30:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 18:30:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 18:30:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 18:30:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 18:30:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-18 18:30:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 18:30:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 18:30:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 18:30:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 18:30:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 18:30:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 18:30:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 18:30:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 18:30:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 18:30:40,340 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 18:30:40,342 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 18:30:40,426 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 18:30:40,430 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 18:30:40,430 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 18:30:40,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:30:40 BoogieIcfgContainer [2022-03-18 18:30:40,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 18:30:40,432 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 18:30:40,432 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 18:30:40,435 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 18:30:40,438 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:30:40" (1/1) ... [2022-03-18 18:30:40,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:30:40 BasicIcfg [2022-03-18 18:30:40,455 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 18:30:40,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 18:30:40,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 18:30:40,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 18:30:40,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 06:30:39" (1/4) ... [2022-03-18 18:30:40,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e25dd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:30:40, skipping insertion in model container [2022-03-18 18:30:40,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:30:40" (2/4) ... [2022-03-18 18:30:40,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e25dd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:30:40, skipping insertion in model container [2022-03-18 18:30:40,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:30:40" (3/4) ... [2022-03-18 18:30:40,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e25dd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 06:30:40, skipping insertion in model container [2022-03-18 18:30:40,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:30:40" (4/4) ... [2022-03-18 18:30:40,466 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound2.cJordan [2022-03-18 18:30:40,469 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 18:30:40,470 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 18:30:40,505 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 18:30:40,511 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 [2022-03-18 18:30:40,511 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 18:30:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 18:30:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 18:30:40,525 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:40,526 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:40,526 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:40,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:40,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2022-03-18 18:30:40,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:40,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025731626] [2022-03-18 18:30:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:40,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:40,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:30:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:30:40,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025731626] [2022-03-18 18:30:40,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025731626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:30:40,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:30:40,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 18:30:40,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308088354] [2022-03-18 18:30:40,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:30:40,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 18:30:40,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:40,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 18:30:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 18:30:40,743 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 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 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) [2022-03-18 18:30:40,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:40,844 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-03-18 18:30:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 18:30:40,847 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 [2022-03-18 18:30:40,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:40,851 INFO L225 Difference]: With dead ends: 32 [2022-03-18 18:30:40,852 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 18:30:40,853 INFO L911 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 [2022-03-18 18:30:40,857 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:40,857 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:30:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 18:30:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-18 18:30:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 18:30:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2022-03-18 18:30:40,880 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2022-03-18 18:30:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:40,881 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2022-03-18 18:30:40,881 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) [2022-03-18 18:30:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2022-03-18 18:30:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 18:30:40,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:40,882 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:40,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 18:30:40,882 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2022-03-18 18:30:40,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:40,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078423545] [2022-03-18 18:30:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:40,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:40,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:30:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:30:40,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:40,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078423545] [2022-03-18 18:30:40,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078423545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:30:40,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:30:40,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 18:30:40,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486676226] [2022-03-18 18:30:40,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:30:40,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 18:30:40,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:40,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 18:30:40,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:30:40,939 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-03-18 18:30:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:41,007 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2022-03-18 18:30:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 18:30:41,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 12 [2022-03-18 18:30:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:41,008 INFO L225 Difference]: With dead ends: 28 [2022-03-18 18:30:41,008 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 18:30:41,008 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:30:41,009 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:41,010 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:30:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 18:30:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-18 18:30:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 18:30:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-03-18 18:30:41,015 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2022-03-18 18:30:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:41,015 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-03-18 18:30:41,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-03-18 18:30:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-03-18 18:30:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 18:30:41,016 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:41,016 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:41,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 18:30:41,016 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2022-03-18 18:30:41,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:41,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767804777] [2022-03-18 18:30:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:41,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:41,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:30:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:30:41,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:41,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767804777] [2022-03-18 18:30:41,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767804777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:30:41,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:30:41,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 18:30:41,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747249874] [2022-03-18 18:30:41,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:30:41,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 18:30:41,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:41,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 18:30:41,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:30:41,084 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-03-18 18:30:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:41,178 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-03-18 18:30:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 18:30:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-03-18 18:30:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:41,180 INFO L225 Difference]: With dead ends: 32 [2022-03-18 18:30:41,180 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 18:30:41,181 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:30:41,182 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:41,182 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 73 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:30:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 18:30:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 18:30:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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) [2022-03-18 18:30:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-18 18:30:41,187 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-03-18 18:30:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:41,187 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-18 18:30:41,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-03-18 18:30:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-18 18:30:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 18:30:41,188 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:41,188 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:41,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 18:30:41,188 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2022-03-18 18:30:41,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:41,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697140664] [2022-03-18 18:30:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:41,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:41,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:30:41,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183253368] [2022-03-18 18:30:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:41,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:41,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:30:41,199 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) [2022-03-18 18:30:41,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 18:30:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:41,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 18:30:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:30:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:30:41,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:30:41,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:41,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697140664] [2022-03-18 18:30:41,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:30:41,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183253368] [2022-03-18 18:30:41,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183253368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:30:41,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:30:41,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 18:30:41,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419146103] [2022-03-18 18:30:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:30:41,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 18:30:41,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:41,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 18:30:41,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:30:41,350 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 18:30:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:41,389 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-03-18 18:30:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 18:30:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-18 18:30:41,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:41,392 INFO L225 Difference]: With dead ends: 48 [2022-03-18 18:30:41,392 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 18:30:41,392 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:30:41,398 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:41,400 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 153 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:30:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 18:30:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-03-18 18:30:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 18:30:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-03-18 18:30:41,411 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2022-03-18 18:30:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:41,411 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-03-18 18:30:41,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 18:30:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-03-18 18:30:41,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 18:30:41,413 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:41,413 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:41,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 18:30:41,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:41,616 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:41,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2022-03-18 18:30:41,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:41,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286990429] [2022-03-18 18:30:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:41,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:41,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:30:41,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046494893] [2022-03-18 18:30:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:41,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:41,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:30:41,639 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) [2022-03-18 18:30:41,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 18:30:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:41,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 18:30:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:30:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 18:30:41,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:30:41,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:41,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286990429] [2022-03-18 18:30:41,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:30:41,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046494893] [2022-03-18 18:30:41,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046494893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:30:41,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:30:41,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 18:30:41,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173556752] [2022-03-18 18:30:41,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:30:41,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 18:30:41,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 18:30:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:30:41,765 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 18:30:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:41,796 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-03-18 18:30:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 18:30:41,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 18:30:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:41,797 INFO L225 Difference]: With dead ends: 52 [2022-03-18 18:30:41,797 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 18:30:41,797 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:30:41,798 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:41,798 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 150 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:30:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 18:30:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-03-18 18:30:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 18:30:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-03-18 18:30:41,802 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 22 [2022-03-18 18:30:41,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:41,803 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-03-18 18:30:41,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 18:30:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-03-18 18:30:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 18:30:41,803 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:41,803 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:41,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 18:30:42,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:42,020 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:42,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2022-03-18 18:30:42,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:42,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045752545] [2022-03-18 18:30:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:42,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:42,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:30:42,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376110548] [2022-03-18 18:30:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:42,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:30:42,030 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) [2022-03-18 18:30:42,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 18:30:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:42,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 18:30:42,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:30:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 18:30:42,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:30:42,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:42,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045752545] [2022-03-18 18:30:42,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:30:42,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376110548] [2022-03-18 18:30:42,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376110548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:30:42,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:30:42,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 18:30:42,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077989968] [2022-03-18 18:30:42,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:30:42,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 18:30:42,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:42,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 18:30:42,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:30:42,222 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 18:30:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:42,278 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2022-03-18 18:30:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 18:30:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-18 18:30:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:42,279 INFO L225 Difference]: With dead ends: 60 [2022-03-18 18:30:42,279 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 18:30:42,279 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:30:42,280 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:42,280 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 151 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:30:42,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 18:30:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-18 18:30:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 18:30:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-03-18 18:30:42,285 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2022-03-18 18:30:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:42,285 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-03-18 18:30:42,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 18:30:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-03-18 18:30:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 18:30:42,286 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:42,286 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-03-18 18:30:42,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 18:30:42,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:42,504 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2022-03-18 18:30:42,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:42,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441284928] [2022-03-18 18:30:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:42,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:42,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:30:42,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186998971] [2022-03-18 18:30:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:42,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:42,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:30:42,518 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) [2022-03-18 18:30:42,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 18:30:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 18:30:42,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:30:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 18:30:42,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:30:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 18:30:42,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:42,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441284928] [2022-03-18 18:30:42,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:30:42,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186998971] [2022-03-18 18:30:42,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186998971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:30:42,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:30:42,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-18 18:30:42,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768015393] [2022-03-18 18:30:42,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:30:42,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 18:30:42,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 18:30:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:30:42,757 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-18 18:30:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:42,787 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-03-18 18:30:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 18:30:42,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 45 [2022-03-18 18:30:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:42,799 INFO L225 Difference]: With dead ends: 56 [2022-03-18 18:30:42,799 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 18:30:42,799 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:30:42,800 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:42,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 113 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:30:42,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 18:30:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-18 18:30:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 18:30:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-03-18 18:30:42,807 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2022-03-18 18:30:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:42,807 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-03-18 18:30:42,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-18 18:30:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-03-18 18:30:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 18:30:42,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:42,808 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:42,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 18:30:43,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:43,009 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1899744846, now seen corresponding path program 1 times [2022-03-18 18:30:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:43,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879288449] [2022-03-18 18:30:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:43,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:43,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:30:43,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047231822] [2022-03-18 18:30:43,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:43,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:43,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:30:43,019 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) [2022-03-18 18:30:43,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 18:30:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:43,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 18:30:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:30:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 18:30:43,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:30:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 18:30:43,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:43,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879288449] [2022-03-18 18:30:43,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:30:43,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047231822] [2022-03-18 18:30:43,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047231822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:30:43,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:30:43,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-18 18:30:43,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864431969] [2022-03-18 18:30:43,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:30:43,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 18:30:43,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 18:30:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:30:43,313 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 18:30:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:43,500 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-03-18 18:30:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 18:30:43,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 45 [2022-03-18 18:30:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:43,502 INFO L225 Difference]: With dead ends: 76 [2022-03-18 18:30:43,502 INFO L226 Difference]: Without dead ends: 76 [2022-03-18 18:30:43,502 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-18 18:30:43,503 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:43,503 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 164 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 18:30:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-18 18:30:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2022-03-18 18:30:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 18:30:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2022-03-18 18:30:43,507 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 45 [2022-03-18 18:30:43,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:43,508 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2022-03-18 18:30:43,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 18:30:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2022-03-18 18:30:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 18:30:43,509 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:43,509 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:43,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 18:30:43,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:43,719 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:43,720 INFO L85 PathProgramCache]: Analyzing trace with hash 400776220, now seen corresponding path program 2 times [2022-03-18 18:30:43,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:43,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449227037] [2022-03-18 18:30:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:43,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:43,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:30:43,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317779993] [2022-03-18 18:30:43,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 18:30:43,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:43,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:30:43,731 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) [2022-03-18 18:30:43,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 18:30:43,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 18:30:43,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:30:43,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 18:30:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:30:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 18:30:43,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:30:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 18:30:43,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:43,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449227037] [2022-03-18 18:30:43,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:30:43,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317779993] [2022-03-18 18:30:43,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317779993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:30:43,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:30:43,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-18 18:30:43,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38199898] [2022-03-18 18:30:43,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:30:43,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 18:30:43,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:43,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 18:30:43,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:30:43,998 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 18:30:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:44,078 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2022-03-18 18:30:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 18:30:44,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 50 [2022-03-18 18:30:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:44,079 INFO L225 Difference]: With dead ends: 80 [2022-03-18 18:30:44,079 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 18:30:44,079 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 18:30:44,079 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 7 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:44,080 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 225 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:30:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 18:30:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2022-03-18 18:30:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 41 states have internal predecessors, (42), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 18:30:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2022-03-18 18:30:44,084 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 50 [2022-03-18 18:30:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:44,084 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2022-03-18 18:30:44,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 18:30:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2022-03-18 18:30:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 18:30:44,085 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:44,085 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:44,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 18:30:44,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:44,299 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash -895540175, now seen corresponding path program 3 times [2022-03-18 18:30:44,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:44,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246389272] [2022-03-18 18:30:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:44,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:30:44,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582759652] [2022-03-18 18:30:44,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 18:30:44,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:44,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:30:44,308 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) [2022-03-18 18:30:44,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 18:30:44,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 18:30:44,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:30:44,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 18:30:44,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:30:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 18:30:44,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:30:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 18:30:45,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:45,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246389272] [2022-03-18 18:30:45,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:30:45,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582759652] [2022-03-18 18:30:45,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582759652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:30:45,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:30:45,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-18 18:30:45,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39314385] [2022-03-18 18:30:45,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:30:45,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 18:30:45,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:45,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 18:30:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:30:45,054 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-18 18:30:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:45,247 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2022-03-18 18:30:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 18:30:45,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 55 [2022-03-18 18:30:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:45,248 INFO L225 Difference]: With dead ends: 88 [2022-03-18 18:30:45,248 INFO L226 Difference]: Without dead ends: 82 [2022-03-18 18:30:45,249 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:30:45,249 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 12 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:45,249 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 207 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 18:30:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-18 18:30:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-03-18 18:30:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 47 states have internal predecessors, (48), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 18:30:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-03-18 18:30:45,253 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 55 [2022-03-18 18:30:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:45,253 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-03-18 18:30:45,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-18 18:30:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-03-18 18:30:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 18:30:45,254 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:45,255 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:45,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 18:30:45,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:45,455 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:45,456 INFO L85 PathProgramCache]: Analyzing trace with hash 999510626, now seen corresponding path program 1 times [2022-03-18 18:30:45,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:45,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462508973] [2022-03-18 18:30:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:45,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:30:45,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513938671] [2022-03-18 18:30:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:45,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:45,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:30:45,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:30:45,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 18:30:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:30:45,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 18:30:45,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:30:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 18:30:46,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:30:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 18:30:46,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:30:46,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462508973] [2022-03-18 18:30:46,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:30:46,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513938671] [2022-03-18 18:30:46,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513938671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:30:46,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:30:46,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-18 18:30:46,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931803684] [2022-03-18 18:30:46,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:30:46,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 18:30:46,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:30:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 18:30:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:30:46,313 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-18 18:30:46,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:30:46,595 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2022-03-18 18:30:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 18:30:46,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 71 [2022-03-18 18:30:46,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:30:46,597 INFO L225 Difference]: With dead ends: 107 [2022-03-18 18:30:46,597 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 18:30:46,597 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-18 18:30:46,597 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 18:30:46,598 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 232 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 18:30:46,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 18:30:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2022-03-18 18:30:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 18:30:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-03-18 18:30:46,603 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 71 [2022-03-18 18:30:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:30:46,603 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-03-18 18:30:46,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-18 18:30:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-03-18 18:30:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 18:30:46,604 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:30:46,604 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:46,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 18:30:46,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 18:30:46,812 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:30:46,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:30:46,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1401496737, now seen corresponding path program 2 times [2022-03-18 18:30:46,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:30:46,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924963414] [2022-03-18 18:30:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:30:46,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:30:46,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:30:46,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476283238] [2022-03-18 18:30:46,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 18:30:46,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:46,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:30:46,821 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:30:46,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 18:30:46,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 18:30:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-18 18:30:46,861 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 18:30:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 18:30:46,897 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 18:30:46,897 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 18:30:46,898 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 18:30:46,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 18:30:47,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:30:47,102 INFO L718 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:30:47,104 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 18:30:47,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 06:30:47 BasicIcfg [2022-03-18 18:30:47,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 18:30:47,141 INFO L158 Benchmark]: Toolchain (without parser) took 7166.06ms. Allocated memory was 187.7MB in the beginning and 269.5MB in the end (delta: 81.8MB). Free memory was 139.6MB in the beginning and 203.6MB in the end (delta: -64.0MB). Peak memory consumption was 18.8MB. Max. memory is 8.0GB. [2022-03-18 18:30:47,142 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 187.7MB. Free memory was 155.9MB in the beginning and 155.8MB in the end (delta: 136.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 18:30:47,142 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.17ms. Allocated memory is still 187.7MB. Free memory was 139.5MB in the beginning and 165.1MB in the end (delta: -25.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 18:30:47,142 INFO L158 Benchmark]: Boogie Preprocessor took 33.82ms. Allocated memory is still 187.7MB. Free memory was 165.1MB in the beginning and 163.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 18:30:47,142 INFO L158 Benchmark]: RCFGBuilder took 195.41ms. Allocated memory is still 187.7MB. Free memory was 163.5MB in the beginning and 151.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 18:30:47,142 INFO L158 Benchmark]: IcfgTransformer took 22.70ms. Allocated memory is still 187.7MB. Free memory was 151.9MB in the beginning and 150.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 18:30:47,142 INFO L158 Benchmark]: TraceAbstraction took 6685.25ms. Allocated memory was 187.7MB in the beginning and 269.5MB in the end (delta: 81.8MB). Free memory was 149.9MB in the beginning and 203.6MB in the end (delta: -53.8MB). Peak memory consumption was 28.6MB. Max. memory is 8.0GB. [2022-03-18 18:30:47,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 187.7MB. Free memory was 155.9MB in the beginning and 155.8MB in the end (delta: 136.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 225.17ms. Allocated memory is still 187.7MB. Free memory was 139.5MB in the beginning and 165.1MB in the end (delta: -25.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.82ms. Allocated memory is still 187.7MB. Free memory was 165.1MB in the beginning and 163.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 195.41ms. Allocated memory is still 187.7MB. Free memory was 163.5MB in the beginning and 151.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 22.70ms. Allocated memory is still 187.7MB. Free memory was 151.9MB in the beginning and 150.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 6685.25ms. Allocated memory was 187.7MB in the beginning and 269.5MB in the end (delta: 81.8MB). Free memory was 149.9MB in the beginning and 203.6MB in the end (delta: -53.8MB). Peak memory consumption was 28.6MB. 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 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=5, counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [\old(counter)=0, a=2, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=2, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=2, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND FALSE !(counter++<2) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [\old(counter)=0, a=2, counter=3, n=2, x=8, y=19, z=18] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.6s, OverallIterations: 12, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 144 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 91 mSDsluCounter, 1582 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1111 mSDsCounter, 183 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 657 IncrementalHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 183 mSolverCounterUnsat, 471 mSDtfsCounter, 657 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 626 GetRequests, 556 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=11, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 52 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 440 NumberOfCodeBlocks, 410 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 617 ConstructedInterpolants, 0 QuantifiedInterpolants, 2913 SizeOfPredicates, 12 NumberOfNonLiveVariables, 981 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 1252/1302 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 RESULT: Ultimate proved your program to be incorrect! [2022-03-18 18:30:47,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...