/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/loops/invert_string-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 21:59:46,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 21:59:46,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 21:59:46,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 21:59:46,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 21:59:46,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 21:59:46,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 21:59:46,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 21:59:46,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 21:59:46,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 21:59:46,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 21:59:46,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 21:59:46,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 21:59:46,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 21:59:46,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 21:59:46,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 21:59:46,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 21:59:46,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 21:59:46,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 21:59:46,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 21:59:46,819 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 21:59:46,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 21:59:46,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 21:59:46,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 21:59:46,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 21:59:46,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 21:59:46,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 21:59:46,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 21:59:46,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 21:59:46,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 21:59:46,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 21:59:46,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 21:59:46,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 21:59:46,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 21:59:46,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 21:59:46,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 21:59:46,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 21:59:46,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 21:59:46,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 21:59:46,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 21:59:46,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 21:59:46,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 21:59:46,839 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 [2022-03-19 21:59:46,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 21:59:46,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 21:59:46,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 21:59:46,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 21:59:46,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 21:59:46,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 21:59:46,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 21:59:46,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 21:59:46,876 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 21:59:46,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 21:59:46,877 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 21:59:46,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 21:59:46,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 21:59:46,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 21:59:46,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 21:59:46,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 21:59:46,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 21:59:46,877 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 21:59:46,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 21:59:46,879 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 21:59:46,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 21:59:46,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 21:59:46,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 21:59:46,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 21:59:46,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 21:59:46,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 21:59:46,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 21:59:46,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 21:59:46,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 21:59:46,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 21:59:46,880 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 21:59:46,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 21:59:46,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 21:59:46,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 21:59:47,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 21:59:47,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 21:59:47,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 21:59:47,128 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 21:59:47,128 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 21:59:47,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-3.c [2022-03-19 21:59:47,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb84ac21e/0679c1e98b2b49708bf013ac059ba7a0/FLAG7557f52ce [2022-03-19 21:59:47,615 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 21:59:47,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-3.c [2022-03-19 21:59:47,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb84ac21e/0679c1e98b2b49708bf013ac059ba7a0/FLAG7557f52ce [2022-03-19 21:59:48,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb84ac21e/0679c1e98b2b49708bf013ac059ba7a0 [2022-03-19 21:59:48,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 21:59:48,030 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 21:59:48,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 21:59:48,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 21:59:48,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 21:59:48,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:59:48" (1/1) ... [2022-03-19 21:59:48,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc1400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48, skipping insertion in model container [2022-03-19 21:59:48,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:59:48" (1/1) ... [2022-03-19 21:59:48,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 21:59:48,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 21:59:48,191 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-3.c[327,340] [2022-03-19 21:59:48,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 21:59:48,218 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 21:59:48,229 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-3.c[327,340] [2022-03-19 21:59:48,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 21:59:48,247 INFO L208 MainTranslator]: Completed translation [2022-03-19 21:59:48,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48 WrapperNode [2022-03-19 21:59:48,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 21:59:48,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 21:59:48,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 21:59:48,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 21:59:48,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48" (1/1) ... [2022-03-19 21:59:48,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48" (1/1) ... [2022-03-19 21:59:48,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48" (1/1) ... [2022-03-19 21:59:48,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48" (1/1) ... [2022-03-19 21:59:48,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48" (1/1) ... [2022-03-19 21:59:48,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48" (1/1) ... [2022-03-19 21:59:48,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48" (1/1) ... [2022-03-19 21:59:48,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 21:59:48,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 21:59:48,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 21:59:48,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 21:59:48,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48" (1/1) ... [2022-03-19 21:59:48,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 21:59:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:48,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 21:59:48,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 21:59:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 21:59:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 21:59:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 21:59:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 21:59:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 21:59:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 21:59:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 21:59:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 21:59:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 21:59:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 21:59:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-19 21:59:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 21:59:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 21:59:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 21:59:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 21:59:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 21:59:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 21:59:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 21:59:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 21:59:48,405 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 21:59:48,407 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 21:59:48,660 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 21:59:48,665 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 21:59:48,665 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 21:59:48,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:59:48 BoogieIcfgContainer [2022-03-19 21:59:48,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 21:59:48,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 21:59:48,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 21:59:48,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 21:59:48,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 09:59:48" (1/3) ... [2022-03-19 21:59:48,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f89be74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:59:48, skipping insertion in model container [2022-03-19 21:59:48,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:48" (2/3) ... [2022-03-19 21:59:48,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f89be74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:59:48, skipping insertion in model container [2022-03-19 21:59:48,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:59:48" (3/3) ... [2022-03-19 21:59:48,696 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-3.c [2022-03-19 21:59:48,703 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 21:59:48,703 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 21:59:48,770 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 21:59:48,779 INFO L340 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 [2022-03-19 21:59:48,780 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 21:59:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 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) [2022-03-19 21:59:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 21:59:48,811 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:48,812 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:48,812 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:48,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1728321422, now seen corresponding path program 1 times [2022-03-19 21:59:48,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:48,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159084481] [2022-03-19 21:59:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:48,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:49,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:49,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:49,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159084481] [2022-03-19 21:59:49,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159084481] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 21:59:49,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 21:59:49,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 21:59:49,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751653914] [2022-03-19 21:59:49,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 21:59:49,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 21:59:49,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 21:59:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 21:59:49,289 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 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 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:49,449 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-03-19 21:59:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 21:59:49,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 21:59:49,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:49,457 INFO L225 Difference]: With dead ends: 48 [2022-03-19 21:59:49,458 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 21:59:49,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-19 21:59:49,465 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:49,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 35 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 21:59:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 21:59:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-19 21:59:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 21:59:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-19 21:59:49,508 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2022-03-19 21:59:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:49,509 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-19 21:59:49,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-19 21:59:49,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 21:59:49,510 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:49,511 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:49,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 21:59:49,512 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:49,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1238871028, now seen corresponding path program 1 times [2022-03-19 21:59:49,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:49,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811972413] [2022-03-19 21:59:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:49,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:49,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 21:59:49,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811972413] [2022-03-19 21:59:49,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811972413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 21:59:49,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 21:59:49,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 21:59:49,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804725131] [2022-03-19 21:59:49,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 21:59:49,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 21:59:49,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:49,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 21:59:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 21:59:49,680 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:49,728 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-19 21:59:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 21:59:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 21:59:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:49,729 INFO L225 Difference]: With dead ends: 40 [2022-03-19 21:59:49,729 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 21:59:49,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 21:59:49,731 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:49,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 21:59:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 21:59:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-19 21:59:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2022-03-19 21:59:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-19 21:59:49,738 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-03-19 21:59:49,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:49,738 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-19 21:59:49,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-19 21:59:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 21:59:49,739 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:49,739 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:49,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 21:59:49,740 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:49,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1304082102, now seen corresponding path program 1 times [2022-03-19 21:59:49,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:49,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22035668] [2022-03-19 21:59:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:49,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:49,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 21:59:49,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:49,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22035668] [2022-03-19 21:59:49,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22035668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:49,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938853953] [2022-03-19 21:59:49,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:49,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:49,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:49,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 21:59:49,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 21:59:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:49,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 21:59:49,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:50,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 21:59:50,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 49 [2022-03-19 21:59:50,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-03-19 21:59:50,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-03-19 21:59:50,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-03-19 21:59:50,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 21:59:50,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 21:59:50,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 10 [2022-03-19 21:59:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 21:59:50,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 21:59:50,888 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 21:59:50,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 330 treesize of output 1 [2022-03-19 21:59:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 21:59:50,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938853953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 21:59:50,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 21:59:50,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 10] total 20 [2022-03-19 21:59:50,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011281284] [2022-03-19 21:59:50,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 21:59:50,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 21:59:50,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:50,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 21:59:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-19 21:59:50,917 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:51,882 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-03-19 21:59:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 21:59:51,883 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 21:59:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:51,885 INFO L225 Difference]: With dead ends: 61 [2022-03-19 21:59:51,885 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 21:59:51,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 21:59:51,887 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:51,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 71 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 21:59:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 21:59:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2022-03-19 21:59:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 21:59:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-19 21:59:51,902 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2022-03-19 21:59:51,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:51,902 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-19 21:59:51,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-19 21:59:51,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 21:59:51,903 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:51,903 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:51,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 21:59:52,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:52,105 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:52,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:52,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1139289350, now seen corresponding path program 2 times [2022-03-19 21:59:52,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:52,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612634927] [2022-03-19 21:59:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:52,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:52,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 21:59:52,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:52,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612634927] [2022-03-19 21:59:52,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612634927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:52,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903081275] [2022-03-19 21:59:52,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 21:59:52,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:52,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:52,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 21:59:52,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 21:59:52,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 21:59:52,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 21:59:52,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 21:59:52,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:52,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 21:59:52,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-19 21:59:52,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 21:59:52,940 INFO L356 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2022-03-19 21:59:52,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2022-03-19 21:59:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 21:59:53,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 21:59:53,249 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 21:59:53,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-19 21:59:53,312 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-03-19 21:59:53,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-03-19 21:59:53,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-19 21:59:53,333 INFO L356 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2022-03-19 21:59:53,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 45 [2022-03-19 21:59:53,346 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 21:59:53,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-19 21:59:53,399 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-03-19 21:59:53,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-19 21:59:53,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-19 21:59:53,422 INFO L356 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-03-19 21:59:53,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 49 [2022-03-19 21:59:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 21:59:53,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903081275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 21:59:53,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 21:59:53,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 26 [2022-03-19 21:59:53,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606741058] [2022-03-19 21:59:53,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 21:59:53,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 21:59:53,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:53,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 21:59:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-19 21:59:53,638 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:55,269 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-03-19 21:59:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 21:59:55,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 21:59:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:55,271 INFO L225 Difference]: With dead ends: 69 [2022-03-19 21:59:55,271 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 21:59:55,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=378, Invalid=1692, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 21:59:55,273 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 66 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:55,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 78 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 21:59:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 21:59:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-03-19 21:59:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 21:59:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-19 21:59:55,287 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2022-03-19 21:59:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:55,287 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-19 21:59:55,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-19 21:59:55,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 21:59:55,289 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:55,289 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:55,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 21:59:55,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 21:59:55,512 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1888398848, now seen corresponding path program 3 times [2022-03-19 21:59:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:55,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880914659] [2022-03-19 21:59:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:55,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 21:59:55,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880914659] [2022-03-19 21:59:55,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880914659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755518832] [2022-03-19 21:59:55,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 21:59:55,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:55,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:55,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 21:59:55,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 21:59:55,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 21:59:55,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 21:59:55,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 21:59:55,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 21:59:55,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 21:59:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 21:59:55,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755518832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 21:59:55,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 21:59:55,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2022-03-19 21:59:55,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512453614] [2022-03-19 21:59:55,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 21:59:55,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 21:59:55,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:55,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 21:59:55,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-03-19 21:59:55,950 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:56,170 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-03-19 21:59:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 21:59:56,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 21:59:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:56,173 INFO L225 Difference]: With dead ends: 77 [2022-03-19 21:59:56,173 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 21:59:56,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2022-03-19 21:59:56,174 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:56,174 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 21:59:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 21:59:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 21:59:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 21:59:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-03-19 21:59:56,184 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 29 [2022-03-19 21:59:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:56,184 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-03-19 21:59:56,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-03-19 21:59:56,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 21:59:56,185 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:56,185 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:56,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 21:59:56,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:56,411 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash 606667834, now seen corresponding path program 4 times [2022-03-19 21:59:56,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:56,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711263115] [2022-03-19 21:59:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:56,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:57,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 21:59:57,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:57,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711263115] [2022-03-19 21:59:57,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711263115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:57,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180186529] [2022-03-19 21:59:57,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 21:59:57,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:57,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:57,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 21:59:57,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 21:59:57,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 21:59:57,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 21:59:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 21:59:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:57,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 21:59:57,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-19 21:59:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 21:59:58,333 INFO L356 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2022-03-19 21:59:58,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 13 [2022-03-19 21:59:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 21:59:58,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 21:59:58,668 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 21:59:58,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-19 21:59:58,722 INFO L356 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2022-03-19 21:59:58,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 45 [2022-03-19 21:59:58,730 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-19 21:59:58,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-03-19 21:59:58,742 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 21:59:58,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-19 21:59:58,802 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-19 21:59:58,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-03-19 21:59:58,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-19 21:59:58,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-19 21:59:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 21:59:59,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180186529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 21:59:59,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 21:59:59,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 18] total 50 [2022-03-19 21:59:59,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122890948] [2022-03-19 21:59:59,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 21:59:59,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 21:59:59,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 21:59:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2147, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 21:59:59,396 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 50 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:00:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:07,122 INFO L93 Difference]: Finished difference Result 147 states and 174 transitions. [2022-03-19 22:00:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 22:00:07,122 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 22:00:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:07,124 INFO L225 Difference]: With dead ends: 147 [2022-03-19 22:00:07,124 INFO L226 Difference]: Without dead ends: 145 [2022-03-19 22:00:07,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3637 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2087, Invalid=12193, Unknown=0, NotChecked=0, Total=14280 [2022-03-19 22:00:07,131 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 305 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:07,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 107 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 22:00:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-19 22:00:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 42. [2022-03-19 22:00:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:00:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-03-19 22:00:07,149 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 35 [2022-03-19 22:00:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:07,149 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-03-19 22:00:07,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:00:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-03-19 22:00:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 22:00:07,150 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:07,150 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:00:07,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:00:07,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:07,363 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash -585686760, now seen corresponding path program 1 times [2022-03-19 22:00:07,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:07,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716337358] [2022-03-19 22:00:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:07,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:07,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:07,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 22:00:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-19 22:00:07,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:07,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716337358] [2022-03-19 22:00:07,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716337358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:07,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865636213] [2022-03-19 22:00:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:07,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:07,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:07,573 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:07,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:00:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:07,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 22:00:07,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:07,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 22:00:07,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-19 22:00:08,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:08,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-19 22:00:10,458 WARN L855 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143_168 Int) (aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143_168 Int) (|v_main_~#str2~0.base_BEFORE_CALL_1| Int) (aux_div_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143 Int) (aux_div_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123 Int) (aux_div_v_main_~j~0_BEFORE_CALL_1_46 Int) (|v_main_~#str1~0.base_BEFORE_CALL_1| Int)) (let ((.cse1 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143_168 4294967296))) (let ((.cse0 (+ aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143_168 .cse1))) (and (= (select (select |c_#memory_int| |v_main_~#str2~0.base_BEFORE_CALL_1|) 1) (select (select |c_#memory_int| |v_main_~#str1~0.base_BEFORE_CALL_1|) (+ (- 1) (mod (+ 4294967295 (* 4294967295 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143_168)) 4294967296)))) (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143_168) (< aux_div_v_main_~j~0_BEFORE_CALL_1_46 (+ aux_div_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143 1)) (<= .cse0 4294967295) (< 0 (+ aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143_168 1 .cse1)) (<= .cse0 (+ (* aux_div_v_main_~j~0_BEFORE_CALL_1_46 4294967296) 4294967295)) (<= .cse0 (+ (* aux_div_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123 4294967296) 4294967293)) (< aux_div_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123 (+ aux_div_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143_168 1)) (<= (+ (* aux_div_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_1_46_123_143 4294967296) 4294967293) .cse0) (not (= |v_main_~#str2~0.base_BEFORE_CALL_1| |v_main_~#str1~0.base_BEFORE_CALL_1|)))))) is different from true [2022-03-19 22:00:11,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 22:00:11,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 22:00:11,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 10 [2022-03-19 22:00:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 2 not checked. [2022-03-19 22:00:12,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:12,553 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:12,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 206 [2022-03-19 22:00:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:12,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-19 22:00:12,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 218 [2022-03-19 22:00:12,939 INFO L356 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2022-03-19 22:00:12,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 515 treesize of output 447 [2022-03-19 22:00:13,079 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:13,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 206 [2022-03-19 22:00:13,463 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 22:00:13,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 92 [2022-03-19 22:00:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:13,544 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:13,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 113 [2022-03-19 22:00:13,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:13,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-19 22:00:13,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 22:00:13,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-19 22:00:13,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-19 22:00:13,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 96 [2022-03-19 22:00:13,793 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-19 22:00:13,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 108 [2022-03-19 22:00:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 22:00:14,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865636213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:14,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:14,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 17] total 37 [2022-03-19 22:00:14,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103392020] [2022-03-19 22:00:14,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:14,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 22:00:14,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:14,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 22:00:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1107, Unknown=1, NotChecked=68, Total=1332 [2022-03-19 22:00:14,548 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:00:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:17,689 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2022-03-19 22:00:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 22:00:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2022-03-19 22:00:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:17,690 INFO L225 Difference]: With dead ends: 84 [2022-03-19 22:00:17,691 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 22:00:17,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=499, Invalid=3164, Unknown=1, NotChecked=118, Total=3782 [2022-03-19 22:00:17,692 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:17,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 111 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 681 Invalid, 0 Unknown, 137 Unchecked, 0.5s Time] [2022-03-19 22:00:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 22:00:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-03-19 22:00:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:00:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-03-19 22:00:17,713 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 39 [2022-03-19 22:00:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:17,713 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-03-19 22:00:17,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:00:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-03-19 22:00:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 22:00:17,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:17,715 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:00:17,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 22:00:17,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:17,940 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:17,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1926528494, now seen corresponding path program 2 times [2022-03-19 22:00:17,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:17,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283654195] [2022-03-19 22:00:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:18,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:18,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 22:00:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-19 22:00:18,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:18,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283654195] [2022-03-19 22:00:18,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283654195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:18,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101278208] [2022-03-19 22:00:18,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:00:18,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:18,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:18,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:18,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 22:00:18,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:00:18,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:00:18,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 22:00:18,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:18,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 22:00:18,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-19 22:00:18,882 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-03-19 22:00:18,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-19 22:00:21,298 WARN L855 $PredicateComparison]: unable to prove that (exists ((aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172 Int) (|v_main_~#str2~0.base_BEFORE_CALL_3| Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172 Int) (aux_div_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119 Int) (aux_div_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154 Int) (|v_main_~#str2~0.offset_BEFORE_CALL_3| Int) (|v_main_~#str1~0.base_BEFORE_CALL_3| Int) (aux_div_v_main_~j~0_BEFORE_CALL_3_56 Int)) (let ((.cse1 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172 4294967296))) (let ((.cse0 (+ .cse1 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172))) (and (<= .cse0 (+ (* 4294967296 aux_div_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119) 5)) (<= .cse0 (* aux_div_v_main_~j~0_BEFORE_CALL_3_56 4294967296)) (< 0 (+ 4294967291 .cse1 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172)) (< aux_div_v_main_~j~0_BEFORE_CALL_3_56 (+ aux_div_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154 1)) (= (select (select |c_#memory_int| |v_main_~#str1~0.base_BEFORE_CALL_3|) (+ (mod (+ (* 4294967295 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172) 5) 4294967296) (- 4))) (select (select |c_#memory_int| |v_main_~#str2~0.base_BEFORE_CALL_3|) (+ |v_main_~#str2~0.offset_BEFORE_CALL_3| 4))) (<= .cse0 5) (not (= |v_main_~#str2~0.base_BEFORE_CALL_3| |v_main_~#str1~0.base_BEFORE_CALL_3|)) (< aux_div_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119 (+ aux_div_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172 1)) (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172) (<= (* aux_div_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154 4294967296) (+ 4294967290 .cse1 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172)))))) is different from true [2022-03-19 22:00:22,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 22:00:22,214 INFO L356 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2022-03-19 22:00:22,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 13 [2022-03-19 22:00:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 25 trivial. 2 not checked. [2022-03-19 22:00:22,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:22,728 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:22,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 206 [2022-03-19 22:00:23,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:23,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-19 22:00:23,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 96 [2022-03-19 22:00:23,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:23,186 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-19 22:00:23,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 230 [2022-03-19 22:00:23,247 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-03-19 22:00:23,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 201 [2022-03-19 22:00:23,269 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-19 22:00:23,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2022-03-19 22:00:23,284 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:23,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 206 [2022-03-19 22:00:23,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:23,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-19 22:00:23,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 96 [2022-03-19 22:00:23,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:23,586 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-19 22:00:23,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 108 [2022-03-19 22:00:23,637 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-19 22:00:23,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2022-03-19 22:00:23,670 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-03-19 22:00:23,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 201 [2022-03-19 22:00:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 22:00:24,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101278208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:24,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:24,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 24, 23] total 50 [2022-03-19 22:00:24,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834356533] [2022-03-19 22:00:24,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:24,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 22:00:24,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 22:00:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2073, Unknown=1, NotChecked=94, Total=2450 [2022-03-19 22:00:24,464 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 50 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:00:27,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:27,729 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2022-03-19 22:00:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 22:00:27,729 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2022-03-19 22:00:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:27,730 INFO L225 Difference]: With dead ends: 109 [2022-03-19 22:00:27,730 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 22:00:27,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1067, Invalid=6076, Unknown=1, NotChecked=166, Total=7310 [2022-03-19 22:00:27,733 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 118 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:27,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 135 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1064 Invalid, 0 Unknown, 154 Unchecked, 0.7s Time] [2022-03-19 22:00:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 22:00:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 54. [2022-03-19 22:00:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:00:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-03-19 22:00:27,758 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 45 [2022-03-19 22:00:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:27,758 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-03-19 22:00:27,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:00:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-03-19 22:00:27,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 22:00:27,759 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:27,759 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:00:27,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 22:00:27,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:27,960 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1562112496, now seen corresponding path program 3 times [2022-03-19 22:00:27,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:27,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281950180] [2022-03-19 22:00:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:27,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:28,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:28,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 22:00:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:28,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 22:00:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 22:00:28,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:28,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281950180] [2022-03-19 22:00:28,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281950180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:28,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026635229] [2022-03-19 22:00:28,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:00:28,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:28,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:28,171 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:28,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 22:00:28,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 22:00:28,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:00:28,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 22:00:28,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-19 22:00:28,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 22:00:28,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026635229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:28,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:28,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2022-03-19 22:00:28,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484902513] [2022-03-19 22:00:28,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:28,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 22:00:28,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:28,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 22:00:28,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-19 22:00:28,636 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 22:00:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:29,027 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2022-03-19 22:00:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 22:00:29,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-03-19 22:00:29,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:29,028 INFO L225 Difference]: With dead ends: 89 [2022-03-19 22:00:29,028 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 22:00:29,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-03-19 22:00:29,029 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:29,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 64 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:00:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 22:00:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-03-19 22:00:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:00:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-03-19 22:00:29,056 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2022-03-19 22:00:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:29,056 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-03-19 22:00:29,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 22:00:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-03-19 22:00:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 22:00:29,059 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:29,059 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:00:29,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 22:00:29,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:29,274 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:29,275 INFO L85 PathProgramCache]: Analyzing trace with hash 814759662, now seen corresponding path program 4 times [2022-03-19 22:00:29,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:29,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957513] [2022-03-19 22:00:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:29,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:30,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:30,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:00:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:30,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:00:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 22:00:30,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:30,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957513] [2022-03-19 22:00:30,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:30,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654460870] [2022-03-19 22:00:30,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:00:30,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:30,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:30,444 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:30,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 22:00:30,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:00:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:00:30,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 22:00:30,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:30,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 22:00:30,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-03-19 22:00:31,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:31,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-03-19 22:00:31,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:31,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-03-19 22:00:32,310 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#str2~0.base_BEFORE_CALL_5| Int) (|v_main_~#str1~0.base_BEFORE_CALL_5| Int)) (and (= (select (select |c_#memory_int| |v_main_~#str1~0.base_BEFORE_CALL_5|) 2) (select (select |c_#memory_int| |v_main_~#str2~0.base_BEFORE_CALL_5|) 2)) (not (= |v_main_~#str2~0.base_BEFORE_CALL_5| |v_main_~#str1~0.base_BEFORE_CALL_5|)))) is different from true [2022-03-19 22:00:33,028 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#str1~0.base_BEFORE_CALL_6| Int) (|v_main_~#str2~0.base_BEFORE_CALL_6| Int)) (and (not (= |v_main_~#str2~0.base_BEFORE_CALL_6| |v_main_~#str1~0.base_BEFORE_CALL_6|)) (= (select (select |c_#memory_int| |v_main_~#str1~0.base_BEFORE_CALL_6|) 2) (select (select |c_#memory_int| |v_main_~#str2~0.base_BEFORE_CALL_6|) 2)))) is different from true [2022-03-19 22:00:33,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 22:00:33,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 22:00:33,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 22:00:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 8 not checked. [2022-03-19 22:00:33,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:38,067 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:38,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 988 treesize of output 925 [2022-03-19 22:00:50,460 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-19 22:00:50,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 142 [2022-03-19 22:00:50,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 725 treesize of output 698 [2022-03-19 22:00:51,029 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-19 22:00:51,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 162 [2022-03-19 22:00:51,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 946 treesize of output 910 [2022-03-19 22:00:52,686 INFO L356 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2022-03-19 22:00:52,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 773 treesize of output 718 [2022-03-19 22:00:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:53,198 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-19 22:00:53,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 8208 treesize of output 7324 [2022-03-19 22:01:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 22:01:25,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654460870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:01:25,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:01:25,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28, 23] total 59 [2022-03-19 22:01:25,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317361199] [2022-03-19 22:01:25,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:01:25,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 22:01:25,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:01:25,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 22:01:25,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2781, Unknown=2, NotChecked=222, Total=3422 [2022-03-19 22:01:25,029 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 59 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 56 states have internal predecessors, (86), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 22:01:31,747 WARN L232 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 98 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:03:03,148 WARN L232 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 159 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:03:52,554 WARN L232 SmtUtils]: Spent 45.33s on a formula simplification. DAG size of input: 159 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:04:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:04:31,282 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-03-19 22:04:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 22:04:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 56 states have internal predecessors, (86), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-03-19 22:04:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:04:31,284 INFO L225 Difference]: With dead ends: 79 [2022-03-19 22:04:31,284 INFO L226 Difference]: Without dead ends: 77 [2022-03-19 22:04:31,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 193.0s TimeCoverageRelationStatistics Valid=1033, Invalid=6957, Unknown=28, NotChecked=354, Total=8372 [2022-03-19 22:04:31,286 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 22:04:31,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 130 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 758 Invalid, 0 Unknown, 351 Unchecked, 0.6s Time] [2022-03-19 22:04:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-19 22:04:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2022-03-19 22:04:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:04:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-03-19 22:04:31,311 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 51 [2022-03-19 22:04:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:04:31,312 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-03-19 22:04:31,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 56 states have internal predecessors, (86), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 22:04:31,312 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-03-19 22:04:31,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 22:04:31,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:04:31,313 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:04:31,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-19 22:04:31,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 22:04:31,520 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:04:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:04:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1545771704, now seen corresponding path program 5 times [2022-03-19 22:04:31,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:04:31,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994817416] [2022-03-19 22:04:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:04:31,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:04:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:33,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:04:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:33,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:04:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:33,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:04:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:33,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 22:04:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 22:04:33,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:04:33,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994817416] [2022-03-19 22:04:33,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994817416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:04:33,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650992744] [2022-03-19 22:04:33,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:04:33,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:04:33,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:04:33,248 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:04:33,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 22:04:33,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-19 22:04:33,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:04:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-19 22:04:33,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:04:33,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 22:04:33,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-03-19 22:04:33,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:04:33,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-19 22:04:34,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:04:34,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-03-19 22:04:34,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:04:34,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-19 22:04:44,753 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#str2~0.base_BEFORE_CALL_10| Int) (|v_main_~#str1~0.base_BEFORE_CALL_10| Int)) (and (not (= |v_main_~#str1~0.base_BEFORE_CALL_10| |v_main_~#str2~0.base_BEFORE_CALL_10|)) (= (select (select |c_#memory_int| |v_main_~#str1~0.base_BEFORE_CALL_10|) 3) (select (select |c_#memory_int| |v_main_~#str2~0.base_BEFORE_CALL_10|) 1)))) is different from true [2022-03-19 22:04:45,476 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#str1~0.base_BEFORE_CALL_11| Int) (|v_main_~#str2~0.base_BEFORE_CALL_11| Int)) (and (not (= |v_main_~#str1~0.base_BEFORE_CALL_11| |v_main_~#str2~0.base_BEFORE_CALL_11|)) (= (select (select |c_#memory_int| |v_main_~#str2~0.base_BEFORE_CALL_11|) 1) (select (select |c_#memory_int| |v_main_~#str1~0.base_BEFORE_CALL_11|) 3)))) is different from true [2022-03-19 22:04:45,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 22:04:45,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 22:04:45,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 22:04:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 9 trivial. 16 not checked. [2022-03-19 22:04:45,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:04:53,526 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:04:53,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2266 treesize of output 2138