/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/min-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 23:52:51,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 23:52:51,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 23:52:51,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-30 23:52:51,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-30 23:52:51,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-30 23:52:51,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-30 23:52:51,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-30 23:52:51,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-30 23:52:51,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-30 23:52:51,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-30 23:52:51,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-30 23:52:51,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-30 23:52:51,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-30 23:52:51,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-30 23:52:51,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-30 23:52:51,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-30 23:52:51,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-30 23:52:51,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-30 23:52:51,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-30 23:52:51,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-30 23:52:51,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-30 23:52:51,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-30 23:52:51,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-30 23:52:51,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-30 23:52:51,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-30 23:52:51,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-30 23:52:51,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-30 23:52:51,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-30 23:52:51,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-30 23:52:51,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-30 23:52:51,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-30 23:52:51,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-30 23:52:51,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-30 23:52:51,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-30 23:52:51,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-30 23:52:51,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-30 23:52:51,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-30 23:52:51,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 23:52:51,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 23:52:51,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 23:52:51,488 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 23:52:51,518 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 23:52:51,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 23:52:51,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 23:52:51,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 23:52:51,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 23:52:51,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 23:52:51,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 23:52:51,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 23:52:51,520 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 23:52:51,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 23:52:51,520 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 23:52:51,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 23:52:51,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 23:52:51,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 23:52:51,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 23:52:51,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 23:52:51,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 23:52:51,521 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 23:52:51,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 23:52:51,521 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 23:52:51,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 23:52:51,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 23:52:51,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 23:52:51,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 23:52:51,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:52:51,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 23:52:51,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 23:52:51,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 23:52:51,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 23:52:51,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 23:52:51,522 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 23:52:51,523 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 23:52:51,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 23:52:51,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 23:52:51,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 23:52:51,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 23:52:51,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 23:52:51,777 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 23:52:51,777 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 23:52:51,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-2-u.c [2022-01-30 23:52:51,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e78b4a3/06525836a43242e8b058ffbc3128a134/FLAG3d58f9d1f [2022-01-30 23:52:52,153 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 23:52:52,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-2-u.c [2022-01-30 23:52:52,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e78b4a3/06525836a43242e8b058ffbc3128a134/FLAG3d58f9d1f [2022-01-30 23:52:52,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e78b4a3/06525836a43242e8b058ffbc3128a134 [2022-01-30 23:52:52,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 23:52:52,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 23:52:52,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 23:52:52,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 23:52:52,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 23:52:52,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:52:52" (1/1) ... [2022-01-30 23:52:52,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@384c851d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52, skipping insertion in model container [2022-01-30 23:52:52,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:52:52" (1/1) ... [2022-01-30 23:52:52,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 23:52:52,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 23:52:52,736 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-2-u.c[319,332] [2022-01-30 23:52:52,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:52:52,776 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 23:52:52,786 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-2-u.c[319,332] [2022-01-30 23:52:52,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:52:52,807 INFO L208 MainTranslator]: Completed translation [2022-01-30 23:52:52,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52 WrapperNode [2022-01-30 23:52:52,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 23:52:52,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 23:52:52,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 23:52:52,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 23:52:52,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52" (1/1) ... [2022-01-30 23:52:52,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52" (1/1) ... [2022-01-30 23:52:52,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52" (1/1) ... [2022-01-30 23:52:52,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52" (1/1) ... [2022-01-30 23:52:52,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52" (1/1) ... [2022-01-30 23:52:52,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52" (1/1) ... [2022-01-30 23:52:52,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52" (1/1) ... [2022-01-30 23:52:52,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 23:52:52,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 23:52:52,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 23:52:52,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 23:52:52,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52" (1/1) ... [2022-01-30 23:52:52,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:52:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:52:52,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 23:52:52,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 23:52:52,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 23:52:52,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 23:52:52,919 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 23:52:52,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 23:52:52,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 23:52:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 23:52:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 23:52:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 23:52:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 23:52:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 23:52:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 23:52:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 23:52:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 23:52:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 23:52:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 23:52:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 23:52:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 23:52:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 23:52:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 23:52:52,984 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 23:52:52,985 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 23:52:53,135 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 23:52:53,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 23:52:53,141 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-30 23:52:53,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:52:53 BoogieIcfgContainer [2022-01-30 23:52:53,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 23:52:53,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 23:52:53,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 23:52:53,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 23:52:53,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 11:52:52" (1/3) ... [2022-01-30 23:52:53,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d1c5cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:52:53, skipping insertion in model container [2022-01-30 23:52:53,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:52:52" (2/3) ... [2022-01-30 23:52:53,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d1c5cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:52:53, skipping insertion in model container [2022-01-30 23:52:53,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:52:53" (3/3) ... [2022-01-30 23:52:53,160 INFO L111 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2022-01-30 23:52:53,164 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 23:52:53,164 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 23:52:53,243 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 23:52:53,249 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 23:52:53,249 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 23:52:53,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 23:52:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 23:52:53,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:52:53,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:52:53,266 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:52:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:52:53,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1924503231, now seen corresponding path program 1 times [2022-01-30 23:52:53,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:52:53,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071033959] [2022-01-30 23:52:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:53,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:52:53,347 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:52:53,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304613857] [2022-01-30 23:52:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:53,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:52:53,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:52:53,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 23:52:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:52:53,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:52:53,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:52:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:52:53,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:52:53,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:52:53,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071033959] [2022-01-30 23:52:53,525 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:52:53,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304613857] [2022-01-30 23:52:53,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304613857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:52:53,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:52:53,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 23:52:53,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631970526] [2022-01-30 23:52:53,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:52:53,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:52:53,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:52:53,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:52:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 23:52:53,557 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:53,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:52:53,598 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2022-01-30 23:52:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:52:53,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-30 23:52:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:52:53,606 INFO L225 Difference]: With dead ends: 61 [2022-01-30 23:52:53,606 INFO L226 Difference]: Without dead ends: 30 [2022-01-30 23:52:53,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 23:52:53,612 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:52:53,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 57 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:52:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-30 23:52:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-01-30 23:52:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 23:52:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-01-30 23:52:53,644 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2022-01-30 23:52:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:52:53,644 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-01-30 23:52:53,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-01-30 23:52:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-30 23:52:53,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:52:53,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:52:53,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 23:52:53,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-30 23:52:53,872 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:52:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:52:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash -723175318, now seen corresponding path program 1 times [2022-01-30 23:52:53,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:52:53,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978262125] [2022-01-30 23:52:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:53,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:52:53,885 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:52:53,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974344370] [2022-01-30 23:52:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:53,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:52:53,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:52:53,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 23:52:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:52:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:52:53,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:52:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:52:54,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:52:54,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:52:54,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978262125] [2022-01-30 23:52:54,039 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:52:54,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974344370] [2022-01-30 23:52:54,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974344370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:52:54,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:52:54,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 23:52:54,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706008189] [2022-01-30 23:52:54,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:52:54,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 23:52:54,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:52:54,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 23:52:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:52:54,043 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:52:54,112 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-01-30 23:52:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 23:52:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-30 23:52:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:52:54,116 INFO L225 Difference]: With dead ends: 59 [2022-01-30 23:52:54,116 INFO L226 Difference]: Without dead ends: 38 [2022-01-30 23:52:54,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:52:54,119 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:52:54,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 38 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:52:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-30 23:52:54,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-01-30 23:52:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 23:52:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-01-30 23:52:54,146 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2022-01-30 23:52:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:52:54,147 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-01-30 23:52:54,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-01-30 23:52:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 23:52:54,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:52:54,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:52:54,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 23:52:54,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-30 23:52:54,368 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:52:54,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:52:54,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2032521744, now seen corresponding path program 1 times [2022-01-30 23:52:54,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:52:54,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977307026] [2022-01-30 23:52:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:54,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:52:54,390 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:52:54,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338062885] [2022-01-30 23:52:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:54,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:54,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:52:54,395 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:52:54,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 23:52:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:52:54,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 23:52:54,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:52:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:52:54,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:52:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 23:52:54,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:52:54,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977307026] [2022-01-30 23:52:54,577 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:52:54,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338062885] [2022-01-30 23:52:54,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338062885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:52:54,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 23:52:54,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-30 23:52:54,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301600678] [2022-01-30 23:52:54,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 23:52:54,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 23:52:54,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:52:54,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 23:52:54,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-30 23:52:54,580 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:52:54,709 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2022-01-30 23:52:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 23:52:54,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-30 23:52:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:52:54,711 INFO L225 Difference]: With dead ends: 79 [2022-01-30 23:52:54,711 INFO L226 Difference]: Without dead ends: 55 [2022-01-30 23:52:54,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-30 23:52:54,713 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:52:54,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 68 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:52:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-30 23:52:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-01-30 23:52:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 23:52:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-01-30 23:52:54,723 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 20 [2022-01-30 23:52:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:52:54,723 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-01-30 23:52:54,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:54,724 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-01-30 23:52:54,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-30 23:52:54,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:52:54,724 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:52:54,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 23:52:54,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:54,940 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:52:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:52:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash 624519658, now seen corresponding path program 2 times [2022-01-30 23:52:54,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:52:54,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521337730] [2022-01-30 23:52:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:54,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:52:54,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:52:54,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623778881] [2022-01-30 23:52:54,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 23:52:54,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:54,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:52:54,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:52:54,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 23:52:55,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-30 23:52:55,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:52:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:52:55,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:52:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-30 23:52:55,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:52:55,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:52:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521337730] [2022-01-30 23:52:55,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:52:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623778881] [2022-01-30 23:52:55,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623778881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:52:55,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:52:55,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 23:52:55,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125210824] [2022-01-30 23:52:55,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:52:55,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 23:52:55,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:52:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 23:52:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:52:55,091 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:52:55,147 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2022-01-30 23:52:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 23:52:55,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-30 23:52:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:52:55,152 INFO L225 Difference]: With dead ends: 110 [2022-01-30 23:52:55,152 INFO L226 Difference]: Without dead ends: 88 [2022-01-30 23:52:55,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 23:52:55,159 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:52:55,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:52:55,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-30 23:52:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2022-01-30 23:52:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 23:52:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2022-01-30 23:52:55,177 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 23 [2022-01-30 23:52:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:52:55,177 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2022-01-30 23:52:55,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2022-01-30 23:52:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-30 23:52:55,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:52:55,178 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:52:55,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 23:52:55,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:55,379 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:52:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:52:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash 597567484, now seen corresponding path program 1 times [2022-01-30 23:52:55,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:52:55,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129457573] [2022-01-30 23:52:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:55,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:52:55,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:52:55,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700062116] [2022-01-30 23:52:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:55,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:52:55,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:52:55,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 23:52:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:52:55,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-30 23:52:55,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:52:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-30 23:52:55,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:52:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-30 23:52:55,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:52:55,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129457573] [2022-01-30 23:52:55,710 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:52:55,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700062116] [2022-01-30 23:52:55,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700062116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:52:55,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 23:52:55,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-30 23:52:55,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844101246] [2022-01-30 23:52:55,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 23:52:55,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 23:52:55,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:52:55,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 23:52:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-30 23:52:55,712 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:52:55,978 INFO L93 Difference]: Finished difference Result 142 states and 196 transitions. [2022-01-30 23:52:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 23:52:55,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-30 23:52:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:52:55,980 INFO L225 Difference]: With dead ends: 142 [2022-01-30 23:52:55,980 INFO L226 Difference]: Without dead ends: 96 [2022-01-30 23:52:55,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-30 23:52:55,981 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 200 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 23:52:55,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 80 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 23:52:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-30 23:52:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-01-30 23:52:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 80 states have (on average 1.2) internal successors, (96), 80 states have internal predecessors, (96), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-30 23:52:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2022-01-30 23:52:55,996 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 38 [2022-01-30 23:52:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:52:55,997 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2022-01-30 23:52:55,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2022-01-30 23:52:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-30 23:52:55,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:52:55,998 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:52:56,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 23:52:56,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:56,216 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:52:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:52:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1964707516, now seen corresponding path program 2 times [2022-01-30 23:52:56,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:52:56,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27463519] [2022-01-30 23:52:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:56,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:52:56,234 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:52:56,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251173540] [2022-01-30 23:52:56,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 23:52:56,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:56,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:52:56,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:52:56,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 23:52:56,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 23:52:56,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:52:56,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 23:52:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:52:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-01-30 23:52:56,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:52:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-01-30 23:52:56,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:52:56,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27463519] [2022-01-30 23:52:56,832 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:52:56,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251173540] [2022-01-30 23:52:56,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251173540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:52:56,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 23:52:56,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-30 23:52:56,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823547363] [2022-01-30 23:52:56,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 23:52:56,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 23:52:56,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:52:56,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 23:52:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-30 23:52:56,836 INFO L87 Difference]: Start difference. First operand 95 states and 119 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:52:57,441 INFO L93 Difference]: Finished difference Result 268 states and 376 transitions. [2022-01-30 23:52:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 23:52:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-30 23:52:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:52:57,443 INFO L225 Difference]: With dead ends: 268 [2022-01-30 23:52:57,443 INFO L226 Difference]: Without dead ends: 180 [2022-01-30 23:52:57,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 23:52:57,445 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 390 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 23:52:57,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 104 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 23:52:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-30 23:52:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-01-30 23:52:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 152 states have (on average 1.1842105263157894) internal successors, (180), 152 states have internal predecessors, (180), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-30 23:52:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 227 transitions. [2022-01-30 23:52:57,466 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 227 transitions. Word has length 62 [2022-01-30 23:52:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:52:57,467 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 227 transitions. [2022-01-30 23:52:57,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 227 transitions. [2022-01-30 23:52:57,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-30 23:52:57,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:52:57,469 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:52:57,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-30 23:52:57,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:57,684 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:52:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:52:57,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2138344508, now seen corresponding path program 3 times [2022-01-30 23:52:57,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:52:57,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026197599] [2022-01-30 23:52:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:57,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:52:57,708 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:52:57,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109022660] [2022-01-30 23:52:57,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 23:52:57,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:57,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:52:57,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:52:57,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 23:52:57,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 23:52:57,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:52:57,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 23:52:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:52:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-01-30 23:52:58,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:52:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-01-30 23:52:58,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:52:58,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026197599] [2022-01-30 23:52:58,404 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:52:58,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109022660] [2022-01-30 23:52:58,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109022660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:52:58,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 23:52:58,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-30 23:52:58,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904044457] [2022-01-30 23:52:58,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 23:52:58,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 23:52:58,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:52:58,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 23:52:58,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-30 23:52:58,406 INFO L87 Difference]: Start difference. First operand 179 states and 227 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:58,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:52:58,560 INFO L93 Difference]: Finished difference Result 772 states and 990 transitions. [2022-01-30 23:52:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 23:52:58,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-30 23:52:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:52:58,567 INFO L225 Difference]: With dead ends: 772 [2022-01-30 23:52:58,567 INFO L226 Difference]: Without dead ends: 696 [2022-01-30 23:52:58,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-30 23:52:58,572 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 128 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:52:58,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 74 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:52:58,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-01-30 23:52:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 386. [2022-01-30 23:52:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 359 states have (on average 1.2701949860724233) internal successors, (456), 359 states have internal predecessors, (456), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-30 23:52:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 503 transitions. [2022-01-30 23:52:58,636 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 503 transitions. Word has length 110 [2022-01-30 23:52:58,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:52:58,638 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 503 transitions. [2022-01-30 23:52:58,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:52:58,638 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 503 transitions. [2022-01-30 23:52:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-30 23:52:58,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:52:58,652 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:52:58,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 23:52:58,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:58,878 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:52:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:52:58,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1091594026, now seen corresponding path program 4 times [2022-01-30 23:52:58,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:52:58,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434969177] [2022-01-30 23:52:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:52:58,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:52:58,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:52:58,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615658908] [2022-01-30 23:52:58,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 23:52:58,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:52:58,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:52:58,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:52:58,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 23:52:59,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 23:52:59,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:52:59,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-30 23:52:59,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:53:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-01-30 23:53:00,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:53:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-01-30 23:53:01,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:53:01,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434969177] [2022-01-30 23:53:01,821 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 23:53:01,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615658908] [2022-01-30 23:53:01,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615658908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:53:01,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 23:53:01,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-01-30 23:53:01,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52458831] [2022-01-30 23:53:01,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 23:53:01,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-30 23:53:01,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:53:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-30 23:53:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1145, Invalid=2161, Unknown=0, NotChecked=0, Total=3306 [2022-01-30 23:53:01,826 INFO L87 Difference]: Start difference. First operand 386 states and 503 transitions. Second operand has 58 states, 58 states have (on average 3.310344827586207) internal successors, (192), 58 states have internal predecessors, (192), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:53:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:53:05,638 INFO L93 Difference]: Finished difference Result 1823 states and 2354 transitions. [2022-01-30 23:53:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-30 23:53:05,639 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.310344827586207) internal successors, (192), 58 states have internal predecessors, (192), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 317 [2022-01-30 23:53:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:53:05,648 INFO L225 Difference]: With dead ends: 1823 [2022-01-30 23:53:05,648 INFO L226 Difference]: Without dead ends: 1747 [2022-01-30 23:53:05,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10069 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8406, Invalid=18000, Unknown=0, NotChecked=0, Total=26406 [2022-01-30 23:53:05,654 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 528 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 1071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1071 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-30 23:53:05,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 541 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1071 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-30 23:53:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-01-30 23:53:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 800. [2022-01-30 23:53:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 773 states have (on average 1.3040103492884865) internal successors, (1008), 773 states have internal predecessors, (1008), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-30 23:53:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1055 transitions. [2022-01-30 23:53:05,731 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1055 transitions. Word has length 317 [2022-01-30 23:53:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:53:05,732 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1055 transitions. [2022-01-30 23:53:05,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.310344827586207) internal successors, (192), 58 states have internal predecessors, (192), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 23:53:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1055 transitions. [2022-01-30 23:53:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2022-01-30 23:53:05,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:53:05,747 INFO L514 BasicCegarLoop]: trace histogram [220, 220, 220, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:53:05,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 23:53:05,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-30 23:53:05,968 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:53:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:53:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash 132434154, now seen corresponding path program 5 times [2022-01-30 23:53:05,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:53:05,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633251963] [2022-01-30 23:53:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:53:05,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:53:06,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 23:53:06,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372262804] [2022-01-30 23:53:06,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 23:53:06,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:53:06,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:53:06,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:53:06,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 00:04:36,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 184 check-sat command(s) [2022-01-31 00:04:36,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:04:37,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 00:04:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:04:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 74869 backedges. 34471 proven. 715 refuted. 0 times theorem prover too weak. 39683 trivial. 0 not checked. [2022-01-31 00:04:39,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:04:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 74869 backedges. 31477 proven. 3709 refuted. 0 times theorem prover too weak. 39683 trivial. 0 not checked. [2022-01-31 00:04:40,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:04:40,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633251963] [2022-01-31 00:04:40,972 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:04:40,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372262804] [2022-01-31 00:04:40,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372262804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:04:40,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:04:40,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-31 00:04:40,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108160070] [2022-01-31 00:04:40,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:04:40,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 00:04:40,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:04:40,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 00:04:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 00:04:40,976 INFO L87 Difference]: Start difference. First operand 800 states and 1055 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 00:04:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:04:42,931 INFO L93 Difference]: Finished difference Result 2410 states and 3472 transitions. [2022-01-31 00:04:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 00:04:42,932 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 731 [2022-01-31 00:04:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:04:42,938 INFO L225 Difference]: With dead ends: 2410 [2022-01-31 00:04:42,939 INFO L226 Difference]: Without dead ends: 1617 [2022-01-31 00:04:42,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1484 GetRequests, 1413 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 00:04:42,942 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 550 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 00:04:42,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 178 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 00:04:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2022-01-31 00:04:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1616. [2022-01-31 00:04:43,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1565 states have (on average 1.3035143769968052) internal successors, (2040), 1565 states have internal predecessors, (2040), 48 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 00:04:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2135 transitions. [2022-01-31 00:04:43,043 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2135 transitions. Word has length 731 [2022-01-31 00:04:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:04:43,043 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 2135 transitions. [2022-01-31 00:04:43,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 00:04:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2135 transitions. [2022-01-31 00:04:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1476 [2022-01-31 00:04:43,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:04:43,090 INFO L514 BasicCegarLoop]: trace histogram [460, 460, 460, 46, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:04:43,291 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forcibly destroying the process [2022-01-31 00:04:43,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 00:04:43,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:04:43,353 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:04:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:04:43,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1677050902, now seen corresponding path program 6 times [2022-01-31 00:04:43,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:04:43,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513042596] [2022-01-31 00:04:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:04:43,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:04:43,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:04:43,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570885707] [2022-01-31 00:04:43,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 00:04:43,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:04:43,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:04:43,458 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 00:04:43,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 00:04:43,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-31 00:04:43,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:04:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 00:04:43,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:04:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 322537 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 322536 trivial. 0 not checked. [2022-01-31 00:04:45,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:04:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 322537 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 322536 trivial. 0 not checked. [2022-01-31 00:04:47,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:04:47,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513042596] [2022-01-31 00:04:47,309 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:04:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570885707] [2022-01-31 00:04:47,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570885707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:04:47,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:04:47,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-31 00:04:47,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250564982] [2022-01-31 00:04:47,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:04:47,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 00:04:47,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:04:47,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 00:04:47,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-31 00:04:47,312 INFO L87 Difference]: Start difference. First operand 1616 states and 2135 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 00:04:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:04:47,517 INFO L93 Difference]: Finished difference Result 3323 states and 4365 transitions. [2022-01-31 00:04:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 00:04:47,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1475 [2022-01-31 00:04:47,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:04:47,525 INFO L225 Difference]: With dead ends: 3323 [2022-01-31 00:04:47,525 INFO L226 Difference]: Without dead ends: 1763 [2022-01-31 00:04:47,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2949 GetRequests, 2945 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-31 00:04:47,529 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 00:04:47,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 00:04:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2022-01-31 00:04:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1763. [2022-01-31 00:04:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1712 states have (on average 1.2792056074766356) internal successors, (2190), 1712 states have internal predecessors, (2190), 48 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 00:04:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2285 transitions. [2022-01-31 00:04:47,671 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2285 transitions. Word has length 1475 [2022-01-31 00:04:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:04:47,672 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 2285 transitions. [2022-01-31 00:04:47,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 00:04:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2285 transitions. [2022-01-31 00:04:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1623 [2022-01-31 00:04:47,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:04:47,694 INFO L514 BasicCegarLoop]: trace histogram [460, 460, 460, 184, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:04:47,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 00:04:47,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 00:04:47,912 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:04:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:04:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash 148475905, now seen corresponding path program 7 times [2022-01-31 00:04:47,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:04:47,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167889281] [2022-01-31 00:04:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:04:47,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:04:48,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:04:48,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080051254] [2022-01-31 00:04:48,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 00:04:48,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:04:48,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:04:48,052 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 00:04:48,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 00:04:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:04:49,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 5510 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 00:04:49,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:04:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 339049 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 331337 trivial. 0 not checked. [2022-01-31 00:04:51,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:04:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 339049 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 331337 trivial. 0 not checked. [2022-01-31 00:04:56,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:04:56,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167889281] [2022-01-31 00:04:56,998 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:04:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080051254] [2022-01-31 00:04:56,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080051254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:04:56,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:04:56,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-31 00:04:56,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128089472] [2022-01-31 00:04:56,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:04:57,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 00:04:57,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:04:57,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 00:04:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 00:04:57,005 INFO L87 Difference]: Start difference. First operand 1763 states and 2285 transitions. Second operand has 98 states, 98 states have (on average 1.2142857142857142) internal successors, (119), 98 states have internal predecessors, (119), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 00:05:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:05:06,437 INFO L93 Difference]: Finished difference Result 5249 states and 7540 transitions. [2022-01-31 00:05:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 00:05:06,440 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2142857142857142) internal successors, (119), 98 states have internal predecessors, (119), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1622 [2022-01-31 00:05:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:05:06,453 INFO L225 Difference]: With dead ends: 5249 [2022-01-31 00:05:06,453 INFO L226 Difference]: Without dead ends: 3540 [2022-01-31 00:05:06,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3290 GetRequests, 3147 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 00:05:06,461 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1827 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 1603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1603 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 00:05:06,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1874 Valid, 304 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1603 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 00:05:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2022-01-31 00:05:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 3539. [2022-01-31 00:05:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3539 states, 3440 states have (on average 1.2784883720930234) internal successors, (4398), 3440 states have internal predecessors, (4398), 96 states have call successors, (96), 3 states have call predecessors, (96), 2 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-31 00:05:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 4589 transitions. [2022-01-31 00:05:06,741 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 4589 transitions. Word has length 1622 [2022-01-31 00:05:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:05:06,741 INFO L470 AbstractCegarLoop]: Abstraction has 3539 states and 4589 transitions. [2022-01-31 00:05:06,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2142857142857142) internal successors, (119), 98 states have internal predecessors, (119), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 00:05:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 4589 transitions. [2022-01-31 00:05:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3255 [2022-01-31 00:05:06,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:05:06,836 INFO L514 BasicCegarLoop]: trace histogram [940, 940, 940, 376, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:05:06,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 00:05:07,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 00:05:07,055 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:05:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:05:07,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1850579967, now seen corresponding path program 8 times [2022-01-31 00:05:07,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:05:07,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505933576] [2022-01-31 00:05:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:05:07,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:05:07,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:05:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902389839] [2022-01-31 00:05:07,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 00:05:07,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:05:07,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:05:07,274 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 00:05:07,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 00:05:09,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 00:05:09,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:05:09,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 11078 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-31 00:05:09,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:05:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1405561 backedges. 27079 proven. 4465 refuted. 0 times theorem prover too weak. 1374017 trivial. 0 not checked. [2022-01-31 00:05:15,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:05:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1405561 backedges. 27079 proven. 4465 refuted. 0 times theorem prover too weak. 1374017 trivial. 0 not checked. [2022-01-31 00:05:42,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:05:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505933576] [2022-01-31 00:05:42,205 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:05:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902389839] [2022-01-31 00:05:42,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902389839] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:05:42,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:05:42,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-01-31 00:05:42,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325432840] [2022-01-31 00:05:42,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:05:42,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 00:05:42,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:05:42,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 00:05:42,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 00:05:42,217 INFO L87 Difference]: Start difference. First operand 3539 states and 4589 transitions. Second operand has 194 states, 194 states have (on average 1.1082474226804124) internal successors, (215), 194 states have internal predecessors, (215), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)