/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/pnr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:26:57,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:26:57,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:26:57,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-30 22:26:57,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-30 22:26:57,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-30 22:26:57,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-30 22:26:57,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-30 22:26:57,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-30 22:26:57,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-30 22:26:57,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-30 22:26:57,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-30 22:26:57,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-30 22:26:57,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-30 22:26:57,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-30 22:26:57,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-30 22:26:57,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-30 22:26:57,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-30 22:26:57,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-30 22:26:57,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-30 22:26:57,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-30 22:26:57,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-30 22:26:57,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-30 22:26:57,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-30 22:26:57,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-30 22:26:57,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-30 22:26:57,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-30 22:26:57,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-30 22:26:57,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-30 22:26:57,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-30 22:26:57,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-30 22:26:57,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-30 22:26:57,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-30 22:26:57,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-30 22:26:57,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-30 22:26:57,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-30 22:26:57,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-30 22:26:58,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-30 22:26:58,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 22:26:58,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 22:26:58,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 22:26:58,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 22:26:58,019 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:26:58,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:26:58,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:26:58,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:26:58,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:26:58,020 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:26:58,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:26:58,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:26:58,021 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:26:58,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:26:58,021 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:26:58,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:26:58,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:26:58,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:26:58,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:26:58,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:26:58,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:26:58,022 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:26:58,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:26:58,022 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:26:58,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:26:58,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:26:58,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:26:58,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:26:58,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:26:58,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:26:58,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:26:58,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:26:58,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:26:58,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:26:58,027 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:26:58,027 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:26:58,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:26:58,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:26:58,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:26:58,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:26:58,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:26:58,238 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:26:58,238 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:26:58,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr3.c [2022-01-30 22:26:58,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63898a06/b93abb6060d04a57b40e82cec62b2dc0/FLAGb858a7370 [2022-01-30 22:26:58,641 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:26:58,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr3.c [2022-01-30 22:26:58,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63898a06/b93abb6060d04a57b40e82cec62b2dc0/FLAGb858a7370 [2022-01-30 22:26:58,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63898a06/b93abb6060d04a57b40e82cec62b2dc0 [2022-01-30 22:26:58,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:26:58,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:26:58,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:26:58,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:26:58,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:26:58,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:26:58" (1/1) ... [2022-01-30 22:26:58,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@799d19f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58, skipping insertion in model container [2022-01-30 22:26:58,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:26:58" (1/1) ... [2022-01-30 22:26:58,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:26:58,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:26:58,834 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr3.c[395,408] [2022-01-30 22:26:58,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:26:58,870 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:26:58,879 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr3.c[395,408] [2022-01-30 22:26:58,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:26:58,911 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:26:58,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58 WrapperNode [2022-01-30 22:26:58,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:26:58,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:26:58,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:26:58,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:26:58,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58" (1/1) ... [2022-01-30 22:26:58,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58" (1/1) ... [2022-01-30 22:26:58,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58" (1/1) ... [2022-01-30 22:26:58,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58" (1/1) ... [2022-01-30 22:26:58,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58" (1/1) ... [2022-01-30 22:26:58,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58" (1/1) ... [2022-01-30 22:26:58,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58" (1/1) ... [2022-01-30 22:26:58,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:26:58,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:26:58,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:26:58,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:26:58,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58" (1/1) ... [2022-01-30 22:26:58,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:26:58,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:26:58,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 22:26:59,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 22:26:59,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:26:59,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:26:59,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:26:59,021 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-30 22:26:59,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 22:26:59,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-01-30 22:26:59,023 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:26:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-30 22:26:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:26:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:26:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:26:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:26:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:26:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:26:59,093 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:26:59,094 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:26:59,241 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:26:59,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:26:59,245 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-30 22:26:59,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:26:59 BoogieIcfgContainer [2022-01-30 22:26:59,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:26:59,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:26:59,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:26:59,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:26:59,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:26:58" (1/3) ... [2022-01-30 22:26:59,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fde81e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:26:59, skipping insertion in model container [2022-01-30 22:26:59,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:26:58" (2/3) ... [2022-01-30 22:26:59,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fde81e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:26:59, skipping insertion in model container [2022-01-30 22:26:59,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:26:59" (3/3) ... [2022-01-30 22:26:59,261 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr3.c [2022-01-30 22:26:59,264 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:26:59,265 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:26:59,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:26:59,331 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:26:59,331 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:26:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 30 states have (on average 1.4) internal successors, (42), 31 states have internal predecessors, (42), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-30 22:26:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-30 22:26:59,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:26:59,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:26:59,353 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:26:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:26:59,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1847036751, now seen corresponding path program 1 times [2022-01-30 22:26:59,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:26:59,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073032467] [2022-01-30 22:26:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:26:59,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:26:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:26:59,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:26:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:26:59,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:26:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:26:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:26:59,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:26:59,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073032467] [2022-01-30 22:26:59,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073032467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:26:59,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:26:59,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:26:59,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225692198] [2022-01-30 22:26:59,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:26:59,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:26:59,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:26:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:26:59,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:26:59,619 INFO L87 Difference]: Start difference. First operand has 44 states, 30 states have (on average 1.4) internal successors, (42), 31 states have internal predecessors, (42), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:26:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:26:59,723 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2022-01-30 22:26:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:26:59,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-01-30 22:26:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:26:59,730 INFO L225 Difference]: With dead ends: 77 [2022-01-30 22:26:59,730 INFO L226 Difference]: Without dead ends: 39 [2022-01-30 22:26:59,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:26:59,735 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:26:59,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 56 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:26:59,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-30 22:26:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-01-30 22:26:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-30 22:26:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-01-30 22:26:59,761 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 21 [2022-01-30 22:26:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:26:59,762 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-01-30 22:26:59,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:26:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-01-30 22:26:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-30 22:26:59,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:26:59,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:26:59,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 22:26:59,763 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:26:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:26:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1714668940, now seen corresponding path program 1 times [2022-01-30 22:26:59,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:26:59,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338629096] [2022-01-30 22:26:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:26:59,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:26:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:26:59,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:26:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:26:59,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:26:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:26:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:26:59,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:26:59,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338629096] [2022-01-30 22:26:59,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338629096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:26:59,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:26:59,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-30 22:26:59,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430857042] [2022-01-30 22:26:59,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:26:59,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-30 22:26:59,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:26:59,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-30 22:26:59,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:26:59,891 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:27:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:00,005 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-01-30 22:27:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:27:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-01-30 22:27:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:00,006 INFO L225 Difference]: With dead ends: 61 [2022-01-30 22:27:00,006 INFO L226 Difference]: Without dead ends: 50 [2022-01-30 22:27:00,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-30 22:27:00,007 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:00,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 39 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:27:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-30 22:27:00,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2022-01-30 22:27:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-30 22:27:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-01-30 22:27:00,029 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 21 [2022-01-30 22:27:00,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:00,030 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-01-30 22:27:00,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:27:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-01-30 22:27:00,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-30 22:27:00,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:00,032 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:00,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 22:27:00,032 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash 780045924, now seen corresponding path program 1 times [2022-01-30 22:27:00,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:00,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873366810] [2022-01-30 22:27:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:00,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:00,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:00,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:00,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:00,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:00,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:00,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:00,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873366810] [2022-01-30 22:27:00,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873366810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:00,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593196095] [2022-01-30 22:27:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:00,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:00,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:00,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:00,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:27:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:00,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-30 22:27:00,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:00,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:00,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:00,570 INFO L387 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 30 treesize of output 29 [2022-01-30 22:27:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:00,603 INFO L387 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 22 treesize of output 21 [2022-01-30 22:27:00,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-01-30 22:27:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:00,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:00,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 13 [2022-01-30 22:27:00,793 INFO L387 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 24 treesize of output 22 [2022-01-30 22:27:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:00,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593196095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:00,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:00,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 16 [2022-01-30 22:27:00,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25668772] [2022-01-30 22:27:00,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:00,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:27:00,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:00,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:27:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:27:00,847 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 13 states have internal predecessors, (44), 7 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-30 22:27:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:01,249 INFO L93 Difference]: Finished difference Result 95 states and 124 transitions. [2022-01-30 22:27:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-30 22:27:01,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 13 states have internal predecessors, (44), 7 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 41 [2022-01-30 22:27:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:01,251 INFO L225 Difference]: With dead ends: 95 [2022-01-30 22:27:01,251 INFO L226 Difference]: Without dead ends: 93 [2022-01-30 22:27:01,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-30 22:27:01,252 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 68 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:01,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 274 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 22:27:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-30 22:27:01,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2022-01-30 22:27:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-30 22:27:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-01-30 22:27:01,261 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 41 [2022-01-30 22:27:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:01,261 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-01-30 22:27:01,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 13 states have internal predecessors, (44), 7 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-30 22:27:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-01-30 22:27:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-30 22:27:01,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:01,262 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:01,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-30 22:27:01,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:01,476 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:01,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1202747750, now seen corresponding path program 1 times [2022-01-30 22:27:01,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:01,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709283871] [2022-01-30 22:27:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:01,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:01,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:01,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:01,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:01,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:01,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:01,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:01,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709283871] [2022-01-30 22:27:01,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709283871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:01,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985540047] [2022-01-30 22:27:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:01,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:01,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:01,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:01,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:27:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:01,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-30 22:27:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:01,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:27:01,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:01,920 INFO L387 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 29 treesize of output 28 [2022-01-30 22:27:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:01,980 INFO L387 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 21 treesize of output 20 [2022-01-30 22:27:02,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-01-30 22:27:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:27:02,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:02,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-01-30 22:27:02,605 INFO L387 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 30 treesize of output 28 [2022-01-30 22:27:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:02,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985540047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:02,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:02,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2022-01-30 22:27:02,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907823564] [2022-01-30 22:27:02,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:02,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-30 22:27:02,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:02,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-30 22:27:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:27:02,686 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 24 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 12 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-01-30 22:27:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:03,343 INFO L93 Difference]: Finished difference Result 146 states and 194 transitions. [2022-01-30 22:27:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-30 22:27:03,343 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 12 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) Word has length 41 [2022-01-30 22:27:03,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:03,346 INFO L225 Difference]: With dead ends: 146 [2022-01-30 22:27:03,346 INFO L226 Difference]: Without dead ends: 144 [2022-01-30 22:27:03,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2022-01-30 22:27:03,347 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 121 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:03,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 424 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 852 Invalid, 0 Unknown, 106 Unchecked, 0.4s Time] [2022-01-30 22:27:03,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-30 22:27:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 79. [2022-01-30 22:27:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 57 states have internal predecessors, (70), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-30 22:27:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2022-01-30 22:27:03,359 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 41 [2022-01-30 22:27:03,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:03,359 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2022-01-30 22:27:03,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 12 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-01-30 22:27:03,359 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2022-01-30 22:27:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-30 22:27:03,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:03,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:03,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:03,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-30 22:27:03,581 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:03,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1440329911, now seen corresponding path program 1 times [2022-01-30 22:27:03,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:03,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838552444] [2022-01-30 22:27:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:03,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:03,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:03,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:03,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:03,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:03,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:03,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-30 22:27:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:03,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838552444] [2022-01-30 22:27:03,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838552444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048861452] [2022-01-30 22:27:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:03,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:03,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:03,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:03,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:27:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-30 22:27:03,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:03,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:03,879 INFO L387 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 24 treesize of output 23 [2022-01-30 22:27:03,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-01-30 22:27:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:03,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:04,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-30 22:27:04,067 INFO L387 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 30 treesize of output 26 [2022-01-30 22:27:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:04,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048861452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:04,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:04,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 18 [2022-01-30 22:27:04,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89251090] [2022-01-30 22:27:04,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:04,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-30 22:27:04,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-30 22:27:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-30 22:27:04,109 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 15 states have internal predecessors, (55), 9 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-01-30 22:27:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:04,508 INFO L93 Difference]: Finished difference Result 216 states and 309 transitions. [2022-01-30 22:27:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-30 22:27:04,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 15 states have internal predecessors, (55), 9 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 49 [2022-01-30 22:27:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:04,514 INFO L225 Difference]: With dead ends: 216 [2022-01-30 22:27:04,514 INFO L226 Difference]: Without dead ends: 214 [2022-01-30 22:27:04,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:27:04,515 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 119 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:04,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 269 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 22:27:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-30 22:27:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 127. [2022-01-30 22:27:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 89 states have (on average 1.303370786516854) internal successors, (116), 94 states have internal predecessors, (116), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-30 22:27:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2022-01-30 22:27:04,553 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 49 [2022-01-30 22:27:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:04,553 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2022-01-30 22:27:04,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 15 states have internal predecessors, (55), 9 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-01-30 22:27:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2022-01-30 22:27:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-30 22:27:04,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:04,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:04,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:04,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:04,775 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:04,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1049199051, now seen corresponding path program 1 times [2022-01-30 22:27:04,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:04,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267863027] [2022-01-30 22:27:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:04,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:04,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:04,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:04,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:04,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:04,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:04,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-30 22:27:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:04,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:04,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267863027] [2022-01-30 22:27:04,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267863027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:04,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303361458] [2022-01-30 22:27:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:04,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:04,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:04,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:04,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:27:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:05,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-30 22:27:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:05,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:27:05,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:05,205 INFO L387 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 23 treesize of output 22 [2022-01-30 22:27:05,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-01-30 22:27:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:27:05,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:05,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-01-30 22:27:05,488 INFO L387 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 32 [2022-01-30 22:27:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:05,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303361458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:05,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:05,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-01-30 22:27:05,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85796163] [2022-01-30 22:27:05,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:05,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-30 22:27:05,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-30 22:27:05,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:27:05,584 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand has 25 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 15 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-30 22:27:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:06,407 INFO L93 Difference]: Finished difference Result 320 states and 455 transitions. [2022-01-30 22:27:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-30 22:27:06,407 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 15 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) Word has length 49 [2022-01-30 22:27:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:06,409 INFO L225 Difference]: With dead ends: 320 [2022-01-30 22:27:06,409 INFO L226 Difference]: Without dead ends: 318 [2022-01-30 22:27:06,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2022-01-30 22:27:06,410 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 180 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:06,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 542 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1202 Invalid, 0 Unknown, 156 Unchecked, 0.5s Time] [2022-01-30 22:27:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-30 22:27:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 185. [2022-01-30 22:27:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 132 states have (on average 1.3333333333333333) internal successors, (176), 137 states have internal predecessors, (176), 42 states have call successors, (42), 11 states have call predecessors, (42), 10 states have return successors, (41), 36 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-30 22:27:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 259 transitions. [2022-01-30 22:27:06,428 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 259 transitions. Word has length 49 [2022-01-30 22:27:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:06,428 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 259 transitions. [2022-01-30 22:27:06,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 15 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-30 22:27:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 259 transitions. [2022-01-30 22:27:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-30 22:27:06,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:06,430 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:06,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:06,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:06,648 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:06,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2092606674, now seen corresponding path program 2 times [2022-01-30 22:27:06,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:06,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355280617] [2022-01-30 22:27:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:06,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:06,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:06,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:06,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:06,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:06,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:06,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-30 22:27:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:06,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-30 22:27:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 22:27:06,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355280617] [2022-01-30 22:27:06,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355280617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396971564] [2022-01-30 22:27:06,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:27:06,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:06,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:06,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:27:06,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:27:06,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:06,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 22:27:06,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:06,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-30 22:27:06,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 8 [2022-01-30 22:27:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 22:27:06,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:07,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-30 22:27:07,052 INFO L387 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 30 treesize of output 26 [2022-01-30 22:27:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 22:27:07,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396971564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:07,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:07,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 16 [2022-01-30 22:27:07,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144017039] [2022-01-30 22:27:07,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:07,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:27:07,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:07,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:27:07,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:27:07,104 INFO L87 Difference]: Start difference. First operand 185 states and 259 transitions. Second operand has 16 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-30 22:27:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:07,701 INFO L93 Difference]: Finished difference Result 658 states and 993 transitions. [2022-01-30 22:27:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-30 22:27:07,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 57 [2022-01-30 22:27:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:07,713 INFO L225 Difference]: With dead ends: 658 [2022-01-30 22:27:07,713 INFO L226 Difference]: Without dead ends: 656 [2022-01-30 22:27:07,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-01-30 22:27:07,714 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 84 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:07,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 348 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 22:27:07,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-30 22:27:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 385. [2022-01-30 22:27:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 276 states have (on average 1.3804347826086956) internal successors, (381), 285 states have internal predecessors, (381), 97 states have call successors, (97), 12 states have call predecessors, (97), 11 states have return successors, (96), 87 states have call predecessors, (96), 96 states have call successors, (96) [2022-01-30 22:27:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 574 transitions. [2022-01-30 22:27:07,764 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 574 transitions. Word has length 57 [2022-01-30 22:27:07,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:07,766 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 574 transitions. [2022-01-30 22:27:07,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-30 22:27:07,767 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 574 transitions. [2022-01-30 22:27:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-30 22:27:07,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:07,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:07,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-30 22:27:07,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:07,970 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:07,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:07,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1952058064, now seen corresponding path program 1 times [2022-01-30 22:27:07,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:07,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837029965] [2022-01-30 22:27:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:07,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:08,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:08,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:08,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:08,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:08,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:08,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-30 22:27:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:08,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-30 22:27:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 22:27:08,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837029965] [2022-01-30 22:27:08,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837029965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962292886] [2022-01-30 22:27:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:08,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:08,095 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:08,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:27:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:08,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-30 22:27:08,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:08,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-01-30 22:27:08,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-30 22:27:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 22:27:08,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:08,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-01-30 22:27:08,649 INFO L387 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 32 [2022-01-30 22:27:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 22:27:08,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962292886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:08,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:08,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 29 [2022-01-30 22:27:08,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834609618] [2022-01-30 22:27:08,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:08,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-30 22:27:08,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-30 22:27:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-01-30 22:27:08,780 INFO L87 Difference]: Start difference. First operand 385 states and 574 transitions. Second operand has 29 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 15 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-01-30 22:27:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:10,395 INFO L93 Difference]: Finished difference Result 1071 states and 1619 transitions. [2022-01-30 22:27:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-30 22:27:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 15 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) Word has length 57 [2022-01-30 22:27:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:10,400 INFO L225 Difference]: With dead ends: 1071 [2022-01-30 22:27:10,400 INFO L226 Difference]: Without dead ends: 1069 [2022-01-30 22:27:10,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=639, Invalid=3393, Unknown=0, NotChecked=0, Total=4032 [2022-01-30 22:27:10,402 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 224 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 2380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:10,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 690 Invalid, 2380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1804 Invalid, 0 Unknown, 147 Unchecked, 0.9s Time] [2022-01-30 22:27:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-01-30 22:27:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 392. [2022-01-30 22:27:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 281 states have (on average 1.3772241992882561) internal successors, (387), 290 states have internal predecessors, (387), 97 states have call successors, (97), 14 states have call predecessors, (97), 13 states have return successors, (96), 87 states have call predecessors, (96), 96 states have call successors, (96) [2022-01-30 22:27:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 580 transitions. [2022-01-30 22:27:10,442 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 580 transitions. Word has length 57 [2022-01-30 22:27:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:10,442 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 580 transitions. [2022-01-30 22:27:10,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 15 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-01-30 22:27:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 580 transitions. [2022-01-30 22:27:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-30 22:27:10,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:10,444 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:10,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:10,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:10,662 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash 262261592, now seen corresponding path program 2 times [2022-01-30 22:27:10,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:10,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074071096] [2022-01-30 22:27:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:10,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:10,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:10,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:10,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:10,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:10,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:10,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:27:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:10,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:10,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-30 22:27:10,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:10,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074071096] [2022-01-30 22:27:10,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074071096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:10,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151610913] [2022-01-30 22:27:10,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:27:10,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:10,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:10,894 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:10,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:27:10,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:27:10,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:10,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-30 22:27:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:11,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:27:11,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:11,116 INFO L387 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 29 treesize of output 28 [2022-01-30 22:27:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:11,200 INFO L387 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 29 treesize of output 28 [2022-01-30 22:27:11,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:11,301 INFO L387 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 24 treesize of output 23 [2022-01-30 22:27:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:11,358 INFO L387 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 24 treesize of output 23 [2022-01-30 22:27:11,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:11,426 INFO L387 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 24 treesize of output 23 [2022-01-30 22:27:11,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-01-30 22:27:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:27:11,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:12,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151610913] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:12,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:27:12,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-01-30 22:27:12,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37917965] [2022-01-30 22:27:12,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:12,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-30 22:27:12,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:12,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-30 22:27:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=525, Unknown=1, NotChecked=0, Total=600 [2022-01-30 22:27:12,379 INFO L87 Difference]: Start difference. First operand 392 states and 580 transitions. Second operand has 22 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 12 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2022-01-30 22:27:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:13,289 INFO L93 Difference]: Finished difference Result 741 states and 1082 transitions. [2022-01-30 22:27:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-30 22:27:13,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 12 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 61 [2022-01-30 22:27:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:13,298 INFO L225 Difference]: With dead ends: 741 [2022-01-30 22:27:13,298 INFO L226 Difference]: Without dead ends: 739 [2022-01-30 22:27:13,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=270, Invalid=1799, Unknown=1, NotChecked=0, Total=2070 [2022-01-30 22:27:13,300 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 176 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:13,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 482 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1076 Invalid, 0 Unknown, 121 Unchecked, 0.5s Time] [2022-01-30 22:27:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-30 22:27:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 397. [2022-01-30 22:27:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 283 states have (on average 1.3745583038869258) internal successors, (389), 295 states have internal predecessors, (389), 99 states have call successors, (99), 15 states have call predecessors, (99), 14 states have return successors, (98), 86 states have call predecessors, (98), 98 states have call successors, (98) [2022-01-30 22:27:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 586 transitions. [2022-01-30 22:27:13,361 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 586 transitions. Word has length 61 [2022-01-30 22:27:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:13,361 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 586 transitions. [2022-01-30 22:27:13,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 12 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2022-01-30 22:27:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 586 transitions. [2022-01-30 22:27:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-30 22:27:13,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:13,363 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:13,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:13,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:13,574 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1600172563, now seen corresponding path program 3 times [2022-01-30 22:27:13,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320587194] [2022-01-30 22:27:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:13,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-30 22:27:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-30 22:27:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:27:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-30 22:27:13,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:13,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320587194] [2022-01-30 22:27:13,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320587194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:13,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769403958] [2022-01-30 22:27:13,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:27:13,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:13,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:13,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:13,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:27:13,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-30 22:27:13,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:13,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-30 22:27:13,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-30 22:27:14,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-30 22:27:14,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769403958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:14,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:14,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 28 [2022-01-30 22:27:14,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156895772] [2022-01-30 22:27:14,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:14,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-30 22:27:14,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:14,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-30 22:27:14,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2022-01-30 22:27:14,456 INFO L87 Difference]: Start difference. First operand 397 states and 586 transitions. Second operand has 28 states, 28 states have (on average 3.25) internal successors, (91), 27 states have internal predecessors, (91), 17 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-30 22:27:14,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:14,860 INFO L93 Difference]: Finished difference Result 481 states and 688 transitions. [2022-01-30 22:27:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-30 22:27:14,860 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 27 states have internal predecessors, (91), 17 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) Word has length 65 [2022-01-30 22:27:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:14,862 INFO L225 Difference]: With dead ends: 481 [2022-01-30 22:27:14,862 INFO L226 Difference]: Without dead ends: 431 [2022-01-30 22:27:14,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2022-01-30 22:27:14,863 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 220 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:14,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 99 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:27:14,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-30 22:27:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 392. [2022-01-30 22:27:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 280 states have (on average 1.3535714285714286) internal successors, (379), 291 states have internal predecessors, (379), 98 states have call successors, (98), 14 states have call predecessors, (98), 13 states have return successors, (97), 86 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-30 22:27:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 574 transitions. [2022-01-30 22:27:14,913 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 574 transitions. Word has length 65 [2022-01-30 22:27:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:14,913 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 574 transitions. [2022-01-30 22:27:14,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 27 states have internal predecessors, (91), 17 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-30 22:27:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 574 transitions. [2022-01-30 22:27:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-30 22:27:14,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:14,915 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:14,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:15,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 22:27:15,127 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:15,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash 549088061, now seen corresponding path program 2 times [2022-01-30 22:27:15,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:15,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811872431] [2022-01-30 22:27:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:15,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:15,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:15,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:15,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:15,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:15,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:15,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:27:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:15,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:15,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:15,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:27:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-30 22:27:15,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:15,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811872431] [2022-01-30 22:27:15,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811872431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:15,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397769095] [2022-01-30 22:27:15,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:27:15,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:15,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:15,340 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:15,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:27:15,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:27:15,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:15,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-30 22:27:15,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:15,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:27:15,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:15,594 INFO L387 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 29 treesize of output 28 [2022-01-30 22:27:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:15,680 INFO L387 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 26 treesize of output 25 [2022-01-30 22:27:15,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:15,742 INFO L387 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 26 treesize of output 25 [2022-01-30 22:27:15,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:15,801 INFO L387 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 26 treesize of output 25 [2022-01-30 22:27:15,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-01-30 22:27:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-30 22:27:15,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:16,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397769095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:16,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:27:16,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2022-01-30 22:27:16,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929084136] [2022-01-30 22:27:16,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:16,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-30 22:27:16,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:16,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-30 22:27:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=619, Unknown=1, NotChecked=0, Total=702 [2022-01-30 22:27:16,501 INFO L87 Difference]: Start difference. First operand 392 states and 574 transitions. Second operand has 23 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 14 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-30 22:27:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:17,332 INFO L93 Difference]: Finished difference Result 683 states and 991 transitions. [2022-01-30 22:27:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-30 22:27:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 14 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) Word has length 69 [2022-01-30 22:27:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:17,335 INFO L225 Difference]: With dead ends: 683 [2022-01-30 22:27:17,335 INFO L226 Difference]: Without dead ends: 681 [2022-01-30 22:27:17,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=233, Invalid=1658, Unknown=1, NotChecked=0, Total=1892 [2022-01-30 22:27:17,337 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 164 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:17,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 482 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 988 Invalid, 0 Unknown, 129 Unchecked, 0.5s Time] [2022-01-30 22:27:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-30 22:27:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 417. [2022-01-30 22:27:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 301 states have (on average 1.3488372093023255) internal successors, (406), 311 states have internal predecessors, (406), 99 states have call successors, (99), 17 states have call predecessors, (99), 16 states have return successors, (98), 88 states have call predecessors, (98), 98 states have call successors, (98) [2022-01-30 22:27:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 603 transitions. [2022-01-30 22:27:17,395 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 603 transitions. Word has length 69 [2022-01-30 22:27:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:17,395 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 603 transitions. [2022-01-30 22:27:17,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 14 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-30 22:27:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 603 transitions. [2022-01-30 22:27:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-30 22:27:17,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:17,400 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:17,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:17,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:17,618 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:17,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1441244600, now seen corresponding path program 1 times [2022-01-30 22:27:17,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:17,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479275231] [2022-01-30 22:27:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:17,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:27:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:27:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:27:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:27:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-30 22:27:17,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:17,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479275231] [2022-01-30 22:27:17,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479275231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:17,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547526912] [2022-01-30 22:27:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:17,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:17,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:17,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:17,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 22:27:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:17,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-30 22:27:17,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:18,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:27:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:18,118 INFO L387 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 29 treesize of output 28 [2022-01-30 22:27:18,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:18,172 INFO L387 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 29 treesize of output 28 [2022-01-30 22:27:18,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:18,254 INFO L387 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 24 treesize of output 23 [2022-01-30 22:27:18,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:18,308 INFO L387 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 24 treesize of output 23 [2022-01-30 22:27:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:18,374 INFO L387 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 24 treesize of output 23 [2022-01-30 22:27:18,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:18,461 INFO L387 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 24 treesize of output 23 [2022-01-30 22:27:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:18,517 INFO L387 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 24 treesize of output 23 [2022-01-30 22:27:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:18,599 INFO L387 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 24 treesize of output 23 [2022-01-30 22:27:18,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-01-30 22:27:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 34 proven. 26 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-30 22:27:18,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:19,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547526912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:19,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:27:19,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-30 22:27:19,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397393850] [2022-01-30 22:27:19,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:19,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-30 22:27:19,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-30 22:27:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=606, Unknown=1, NotChecked=0, Total=702 [2022-01-30 22:27:19,569 INFO L87 Difference]: Start difference. First operand 417 states and 603 transitions. Second operand has 24 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 14 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2022-01-30 22:27:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:20,322 INFO L93 Difference]: Finished difference Result 518 states and 737 transitions. [2022-01-30 22:27:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-30 22:27:20,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 14 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) Word has length 81 [2022-01-30 22:27:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:20,325 INFO L225 Difference]: With dead ends: 518 [2022-01-30 22:27:20,334 INFO L226 Difference]: Without dead ends: 516 [2022-01-30 22:27:20,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 102 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=222, Invalid=1499, Unknown=1, NotChecked=0, Total=1722 [2022-01-30 22:27:20,335 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 92 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:20,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 560 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1101 Invalid, 0 Unknown, 140 Unchecked, 0.5s Time] [2022-01-30 22:27:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-30 22:27:20,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 257. [2022-01-30 22:27:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 183 states have (on average 1.284153005464481) internal successors, (235), 191 states have internal predecessors, (235), 57 states have call successors, (57), 17 states have call predecessors, (57), 16 states have return successors, (56), 48 states have call predecessors, (56), 56 states have call successors, (56) [2022-01-30 22:27:20,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 348 transitions. [2022-01-30 22:27:20,374 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 348 transitions. Word has length 81 [2022-01-30 22:27:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:20,374 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 348 transitions. [2022-01-30 22:27:20,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 14 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2022-01-30 22:27:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 348 transitions. [2022-01-30 22:27:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-30 22:27:20,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:20,375 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:20,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:20,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 22:27:20,587 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:20,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1188617731, now seen corresponding path program 4 times [2022-01-30 22:27:20,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:20,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812548242] [2022-01-30 22:27:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:20,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:27:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:27:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:27:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:27:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-30 22:27:20,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:20,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812548242] [2022-01-30 22:27:20,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812548242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:20,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563918698] [2022-01-30 22:27:20,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:27:20,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:20,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:20,786 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:20,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 22:27:20,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:27:20,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:20,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-30 22:27:20,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:20,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:20,953 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:27:20,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:27:20,975 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:27:20,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:27:21,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 8 [2022-01-30 22:27:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-30 22:27:21,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:21,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-30 22:27:21,277 INFO L387 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 30 treesize of output 26 [2022-01-30 22:27:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-30 22:27:21,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563918698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:21,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:21,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-30 22:27:21,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602066741] [2022-01-30 22:27:21,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:21,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-30 22:27:21,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-30 22:27:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-01-30 22:27:21,354 INFO L87 Difference]: Start difference. First operand 257 states and 348 transitions. Second operand has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 24 states have internal predecessors, (95), 17 states have call successors, (30), 4 states have call predecessors, (30), 1 states have return successors, (26), 16 states have call predecessors, (26), 16 states have call successors, (26) [2022-01-30 22:27:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:23,502 INFO L93 Difference]: Finished difference Result 1697 states and 2624 transitions. [2022-01-30 22:27:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-30 22:27:23,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 24 states have internal predecessors, (95), 17 states have call successors, (30), 4 states have call predecessors, (30), 1 states have return successors, (26), 16 states have call predecessors, (26), 16 states have call successors, (26) Word has length 85 [2022-01-30 22:27:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:23,512 INFO L225 Difference]: With dead ends: 1697 [2022-01-30 22:27:23,512 INFO L226 Difference]: Without dead ends: 1695 [2022-01-30 22:27:23,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 175 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=3926, Unknown=0, NotChecked=0, Total=4556 [2022-01-30 22:27:23,514 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 261 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 2694 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 3282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 2694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:23,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 762 Invalid, 3282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 2694 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-30 22:27:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-01-30 22:27:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 432. [2022-01-30 22:27:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 309 states have (on average 1.3268608414239482) internal successors, (410), 323 states have internal predecessors, (410), 105 states have call successors, (105), 18 states have call predecessors, (105), 17 states have return successors, (104), 90 states have call predecessors, (104), 104 states have call successors, (104) [2022-01-30 22:27:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 619 transitions. [2022-01-30 22:27:23,609 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 619 transitions. Word has length 85 [2022-01-30 22:27:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:23,609 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 619 transitions. [2022-01-30 22:27:23,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 24 states have internal predecessors, (95), 17 states have call successors, (30), 4 states have call predecessors, (30), 1 states have return successors, (26), 16 states have call predecessors, (26), 16 states have call successors, (26) [2022-01-30 22:27:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 619 transitions. [2022-01-30 22:27:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-30 22:27:23,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:23,611 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:23,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:23,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 22:27:23,820 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2082104069, now seen corresponding path program 1 times [2022-01-30 22:27:23,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:23,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397984593] [2022-01-30 22:27:23,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:23,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:27:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:27:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:27:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:27:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-30 22:27:24,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:24,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397984593] [2022-01-30 22:27:24,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397984593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:24,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122909037] [2022-01-30 22:27:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:24,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:24,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:24,058 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:24,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 22:27:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:24,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-30 22:27:24,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:24,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:27:24,370 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:27:24,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:27:24,427 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:27:24,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:27:24,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-30 22:27:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-30 22:27:24,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:27,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-01-30 22:27:27,443 INFO L387 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 32 [2022-01-30 22:27:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-30 22:27:27,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122909037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:27,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:27,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-01-30 22:27:27,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134110773] [2022-01-30 22:27:27,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:27,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-30 22:27:27,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:27,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-30 22:27:27,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1011, Unknown=1, NotChecked=0, Total=1122 [2022-01-30 22:27:27,602 INFO L87 Difference]: Start difference. First operand 432 states and 619 transitions. Second operand has 34 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 22 states have call successors, (36), 5 states have call predecessors, (36), 2 states have return successors, (31), 20 states have call predecessors, (31), 20 states have call successors, (31) [2022-01-30 22:27:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:34,767 INFO L93 Difference]: Finished difference Result 969 states and 1396 transitions. [2022-01-30 22:27:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-30 22:27:34,768 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 22 states have call successors, (36), 5 states have call predecessors, (36), 2 states have return successors, (31), 20 states have call predecessors, (31), 20 states have call successors, (31) Word has length 85 [2022-01-30 22:27:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:34,772 INFO L225 Difference]: With dead ends: 969 [2022-01-30 22:27:34,773 INFO L226 Difference]: Without dead ends: 967 [2022-01-30 22:27:34,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=507, Invalid=4458, Unknown=5, NotChecked=0, Total=4970 [2022-01-30 22:27:34,774 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 194 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 3747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:34,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1257 Invalid, 3747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 3203 Invalid, 0 Unknown, 261 Unchecked, 1.2s Time] [2022-01-30 22:27:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-01-30 22:27:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 584. [2022-01-30 22:27:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 419 states have (on average 1.334128878281623) internal successors, (559), 438 states have internal predecessors, (559), 139 states have call successors, (139), 26 states have call predecessors, (139), 25 states have return successors, (138), 119 states have call predecessors, (138), 138 states have call successors, (138) [2022-01-30 22:27:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 836 transitions. [2022-01-30 22:27:34,904 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 836 transitions. Word has length 85 [2022-01-30 22:27:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:34,905 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 836 transitions. [2022-01-30 22:27:34,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 22 states have call successors, (36), 5 states have call predecessors, (36), 2 states have return successors, (31), 20 states have call predecessors, (31), 20 states have call successors, (31) [2022-01-30 22:27:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 836 transitions. [2022-01-30 22:27:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-30 22:27:34,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:34,907 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:34,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-30 22:27:35,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-30 22:27:35,119 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash 334973485, now seen corresponding path program 1 times [2022-01-30 22:27:35,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:35,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607797128] [2022-01-30 22:27:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:35,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:27:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:27:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:27:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:27:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:27:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-30 22:27:35,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:35,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607797128] [2022-01-30 22:27:35,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607797128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:35,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227207989] [2022-01-30 22:27:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:35,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:35,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:35,385 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:35,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 22:27:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-30 22:27:35,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:35,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:27:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:35,671 INFO L387 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 29 treesize of output 28 [2022-01-30 22:27:35,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:35,757 INFO L387 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 26 treesize of output 25 [2022-01-30 22:27:35,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:35,814 INFO L387 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 26 treesize of output 25 [2022-01-30 22:27:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:35,880 INFO L387 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 26 treesize of output 25 [2022-01-30 22:27:35,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:35,967 INFO L387 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 26 treesize of output 25 [2022-01-30 22:27:36,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:36,026 INFO L387 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 26 treesize of output 25 [2022-01-30 22:27:36,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:36,108 INFO L387 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 26 treesize of output 25 [2022-01-30 22:27:36,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-01-30 22:27:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 52 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-30 22:27:36,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:36,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227207989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:36,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:27:36,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2022-01-30 22:27:36,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939599270] [2022-01-30 22:27:36,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:36,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-30 22:27:36,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-30 22:27:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=716, Unknown=1, NotChecked=0, Total=812 [2022-01-30 22:27:36,826 INFO L87 Difference]: Start difference. First operand 584 states and 836 transitions. Second operand has 25 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 16 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (23), 14 states have call predecessors, (23), 14 states have call successors, (23) [2022-01-30 22:27:37,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:37,677 INFO L93 Difference]: Finished difference Result 654 states and 914 transitions. [2022-01-30 22:27:37,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-30 22:27:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 16 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (23), 14 states have call predecessors, (23), 14 states have call successors, (23) Word has length 89 [2022-01-30 22:27:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:37,682 INFO L225 Difference]: With dead ends: 654 [2022-01-30 22:27:37,682 INFO L226 Difference]: Without dead ends: 652 [2022-01-30 22:27:37,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 18 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=1656, Unknown=1, NotChecked=0, Total=1892 [2022-01-30 22:27:37,683 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 108 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:37,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 596 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1158 Invalid, 0 Unknown, 117 Unchecked, 0.5s Time] [2022-01-30 22:27:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-30 22:27:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 309. [2022-01-30 22:27:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 220 states have (on average 1.2772727272727273) internal successors, (281), 228 states have internal predecessors, (281), 66 states have call successors, (66), 23 states have call predecessors, (66), 22 states have return successors, (65), 57 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-30 22:27:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 412 transitions. [2022-01-30 22:27:37,754 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 412 transitions. Word has length 89 [2022-01-30 22:27:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:37,755 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 412 transitions. [2022-01-30 22:27:37,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 16 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (23), 14 states have call predecessors, (23), 14 states have call successors, (23) [2022-01-30 22:27:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 412 transitions. [2022-01-30 22:27:37,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-30 22:27:37,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:37,756 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:37,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-30 22:27:37,968 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash -45969432, now seen corresponding path program 5 times [2022-01-30 22:27:37,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:37,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088466215] [2022-01-30 22:27:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:37,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:27:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:27:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:27:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:27:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:27:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-30 22:27:38,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:38,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088466215] [2022-01-30 22:27:38,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088466215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:38,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614845574] [2022-01-30 22:27:38,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:27:38,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:38,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:38,141 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:38,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-30 22:27:38,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-30 22:27:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:38,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-30 22:27:38,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:38,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:38,344 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:27:38,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:27:38,502 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:27:38,503 INFO L387 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 25 treesize of output 11 [2022-01-30 22:27:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-30 22:27:38,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:38,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-30 22:27:38,639 INFO L387 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 30 treesize of output 26 [2022-01-30 22:27:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-30 22:27:38,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614845574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:38,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:38,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 21 [2022-01-30 22:27:38,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833933003] [2022-01-30 22:27:38,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:38,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-30 22:27:38,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:38,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-30 22:27:38,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-30 22:27:38,717 INFO L87 Difference]: Start difference. First operand 309 states and 412 transitions. Second operand has 21 states, 20 states have (on average 3.55) internal successors, (71), 18 states have internal predecessors, (71), 13 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-30 22:27:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:41,633 INFO L93 Difference]: Finished difference Result 1934 states and 2974 transitions. [2022-01-30 22:27:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-30 22:27:41,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.55) internal successors, (71), 18 states have internal predecessors, (71), 13 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) Word has length 93 [2022-01-30 22:27:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:41,639 INFO L225 Difference]: With dead ends: 1934 [2022-01-30 22:27:41,640 INFO L226 Difference]: Without dead ends: 1932 [2022-01-30 22:27:41,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 198 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=639, Invalid=4911, Unknown=0, NotChecked=0, Total=5550 [2022-01-30 22:27:41,641 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 187 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 3502 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 4073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 3502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:41,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1027 Invalid, 4073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 3502 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-30 22:27:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2022-01-30 22:27:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 573. [2022-01-30 22:27:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 412 states have (on average 1.325242718446602) internal successors, (546), 425 states have internal predecessors, (546), 136 states have call successors, (136), 25 states have call predecessors, (136), 24 states have return successors, (135), 122 states have call predecessors, (135), 135 states have call successors, (135) [2022-01-30 22:27:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 817 transitions. [2022-01-30 22:27:41,826 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 817 transitions. Word has length 93 [2022-01-30 22:27:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:41,826 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 817 transitions. [2022-01-30 22:27:41,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.55) internal successors, (71), 18 states have internal predecessors, (71), 13 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-30 22:27:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 817 transitions. [2022-01-30 22:27:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-30 22:27:41,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:41,828 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:41,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:42,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:42,039 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash -399057814, now seen corresponding path program 2 times [2022-01-30 22:27:42,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:42,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193604743] [2022-01-30 22:27:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:42,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:27:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:27:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:27:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:27:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:27:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-30 22:27:42,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193604743] [2022-01-30 22:27:42,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193604743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282846284] [2022-01-30 22:27:42,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:27:42,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:42,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:42,227 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:42,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-30 22:27:42,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:27:42,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:42,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-30 22:27:42,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:42,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:27:42,578 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:27:42,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:27:42,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-30 22:27:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-30 22:27:42,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:43,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-01-30 22:27:43,184 INFO L387 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 32 [2022-01-30 22:27:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-30 22:27:43,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282846284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:43,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:43,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 38 [2022-01-30 22:27:43,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664763987] [2022-01-30 22:27:43,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:43,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-30 22:27:43,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-30 22:27:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2022-01-30 22:27:43,339 INFO L87 Difference]: Start difference. First operand 573 states and 817 transitions. Second operand has 38 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 26 states have call successors, (39), 5 states have call predecessors, (39), 2 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2022-01-30 22:27:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:47,194 INFO L93 Difference]: Finished difference Result 1215 states and 1776 transitions. [2022-01-30 22:27:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-30 22:27:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 26 states have call successors, (39), 5 states have call predecessors, (39), 2 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) Word has length 93 [2022-01-30 22:27:47,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:47,199 INFO L225 Difference]: With dead ends: 1215 [2022-01-30 22:27:47,199 INFO L226 Difference]: Without dead ends: 1213 [2022-01-30 22:27:47,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 180 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=529, Invalid=4300, Unknown=1, NotChecked=0, Total=4830 [2022-01-30 22:27:47,201 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 202 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:47,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 820 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 2291 Invalid, 0 Unknown, 222 Unchecked, 1.0s Time] [2022-01-30 22:27:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-01-30 22:27:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 600. [2022-01-30 22:27:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 435 states have (on average 1.3149425287356322) internal successors, (572), 445 states have internal predecessors, (572), 136 states have call successors, (136), 29 states have call predecessors, (136), 28 states have return successors, (135), 125 states have call predecessors, (135), 135 states have call successors, (135) [2022-01-30 22:27:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 843 transitions. [2022-01-30 22:27:47,399 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 843 transitions. Word has length 93 [2022-01-30 22:27:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:47,400 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 843 transitions. [2022-01-30 22:27:47,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 26 states have call successors, (39), 5 states have call predecessors, (39), 2 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2022-01-30 22:27:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 843 transitions. [2022-01-30 22:27:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-30 22:27:47,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:47,402 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:47,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:47,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-30 22:27:47,615 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:47,616 INFO L85 PathProgramCache]: Analyzing trace with hash 748850381, now seen corresponding path program 6 times [2022-01-30 22:27:47,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:47,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341171732] [2022-01-30 22:27:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:47,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:27:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:27:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:27:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:27:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:27:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-30 22:27:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 10 proven. 63 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-30 22:27:47,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341171732] [2022-01-30 22:27:47,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341171732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:47,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833352558] [2022-01-30 22:27:47,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:27:47,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:47,782 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:47,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-30 22:27:47,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-30 22:27:47,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:47,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-30 22:27:47,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:47,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:48,213 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:27:48,213 INFO L387 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 25 treesize of output 11 [2022-01-30 22:27:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 10 proven. 63 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-30 22:27:48,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:48,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-30 22:27:48,338 INFO L387 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 30 treesize of output 26 [2022-01-30 22:27:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 10 proven. 63 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-30 22:27:48,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833352558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:48,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:48,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 23 [2022-01-30 22:27:48,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487711464] [2022-01-30 22:27:48,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:48,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-30 22:27:48,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-30 22:27:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-01-30 22:27:48,434 INFO L87 Difference]: Start difference. First operand 600 states and 843 transitions. Second operand has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 20 states have internal predecessors, (74), 14 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-01-30 22:27:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:56,067 INFO L93 Difference]: Finished difference Result 6594 states and 10374 transitions. [2022-01-30 22:27:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-30 22:27:56,068 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 20 states have internal predecessors, (74), 14 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) Word has length 101 [2022-01-30 22:27:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:56,090 INFO L225 Difference]: With dead ends: 6594 [2022-01-30 22:27:56,090 INFO L226 Difference]: Without dead ends: 6592 [2022-01-30 22:27:56,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 215 SyntacticMatches, 7 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8512 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2035, Invalid=19427, Unknown=0, NotChecked=0, Total=21462 [2022-01-30 22:27:56,096 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 352 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 6848 mSolverCounterSat, 1296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 8144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1296 IncrementalHoareTripleChecker+Valid, 6848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:56,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1884 Invalid, 8144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1296 Valid, 6848 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-30 22:27:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6592 states. [2022-01-30 22:27:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6592 to 1225. [2022-01-30 22:27:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 888 states have (on average 1.3468468468468469) internal successors, (1196), 907 states have internal predecessors, (1196), 305 states have call successors, (305), 32 states have call predecessors, (305), 31 states have return successors, (304), 285 states have call predecessors, (304), 304 states have call successors, (304) [2022-01-30 22:27:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1805 transitions. [2022-01-30 22:27:56,634 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1805 transitions. Word has length 101 [2022-01-30 22:27:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:56,634 INFO L470 AbstractCegarLoop]: Abstraction has 1225 states and 1805 transitions. [2022-01-30 22:27:56,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 20 states have internal predecessors, (74), 14 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-01-30 22:27:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1805 transitions. [2022-01-30 22:27:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-30 22:27:56,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:56,637 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:56,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:56,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-30 22:27:56,853 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:56,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:56,853 INFO L85 PathProgramCache]: Analyzing trace with hash 733331663, now seen corresponding path program 1 times [2022-01-30 22:27:56,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:56,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103386442] [2022-01-30 22:27:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:56,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:27:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:27:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:27:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:27:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:27:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-30 22:27:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 10 proven. 63 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-30 22:27:57,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:57,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103386442] [2022-01-30 22:27:57,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103386442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:57,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941298429] [2022-01-30 22:27:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:57,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:57,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:57,053 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:57,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-30 22:27:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-30 22:27:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:57,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-01-30 22:27:57,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-30 22:27:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-30 22:27:57,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:00,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-01-30 22:28:00,092 INFO L387 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 32 [2022-01-30 22:28:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 10 proven. 63 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-30 22:28:00,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941298429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:00,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:00,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 41 [2022-01-30 22:28:00,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958863162] [2022-01-30 22:28:00,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:00,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-30 22:28:00,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-30 22:28:00,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1497, Unknown=1, NotChecked=0, Total=1640 [2022-01-30 22:28:00,278 INFO L87 Difference]: Start difference. First operand 1225 states and 1805 transitions. Second operand has 41 states, 39 states have (on average 3.358974358974359) internal successors, (131), 38 states have internal predecessors, (131), 27 states have call successors, (42), 5 states have call predecessors, (42), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2022-01-30 22:28:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:38,393 INFO L93 Difference]: Finished difference Result 7927 states and 12401 transitions. [2022-01-30 22:28:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-01-30 22:28:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.358974358974359) internal successors, (131), 38 states have internal predecessors, (131), 27 states have call successors, (42), 5 states have call predecessors, (42), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) Word has length 101 [2022-01-30 22:28:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:38,419 INFO L225 Difference]: With dead ends: 7927 [2022-01-30 22:28:38,419 INFO L226 Difference]: Without dead ends: 7925 [2022-01-30 22:28:38,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 240 SyntacticMatches, 10 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32559 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=9444, Invalid=67548, Unknown=14, NotChecked=0, Total=77006 [2022-01-30 22:28:38,425 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 995 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 12590 mSolverCounterSat, 3996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 2779 SdHoareTripleChecker+Invalid, 16955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3996 IncrementalHoareTripleChecker+Valid, 12590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:38,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 2779 Invalid, 16955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3996 Valid, 12590 Invalid, 0 Unknown, 369 Unchecked, 5.9s Time] [2022-01-30 22:28:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7925 states. [2022-01-30 22:28:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7925 to 1783. [2022-01-30 22:28:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1293 states have (on average 1.348801237432328) internal successors, (1744), 1316 states have internal predecessors, (1744), 447 states have call successors, (447), 45 states have call predecessors, (447), 42 states have return successors, (446), 421 states have call predecessors, (446), 446 states have call successors, (446) [2022-01-30 22:28:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2637 transitions. [2022-01-30 22:28:39,172 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2637 transitions. Word has length 101 [2022-01-30 22:28:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:39,172 INFO L470 AbstractCegarLoop]: Abstraction has 1783 states and 2637 transitions. [2022-01-30 22:28:39,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.358974358974359) internal successors, (131), 38 states have internal predecessors, (131), 27 states have call successors, (42), 5 states have call predecessors, (42), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2022-01-30 22:28:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2637 transitions. [2022-01-30 22:28:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-30 22:28:39,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:39,176 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:39,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:39,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:39,398 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:39,398 INFO L85 PathProgramCache]: Analyzing trace with hash 774474233, now seen corresponding path program 1 times [2022-01-30 22:28:39,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:39,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273395976] [2022-01-30 22:28:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:39,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:28:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:28:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:28:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:28:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:28:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:28:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:28:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:28:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:28:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-01-30 22:28:39,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:39,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273395976] [2022-01-30 22:28:39,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273395976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:39,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977269377] [2022-01-30 22:28:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:39,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:39,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:39,694 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:28:39,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-30 22:28:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:39,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-30 22:28:39,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:39,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:28:40,049 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:28:40,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:40,116 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:28:40,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:40,207 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:28:40,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:28:40,270 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:28:40,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:28:40,331 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:28:40,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:28:40,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-30 22:28:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 60 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-30 22:28:40,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:43,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977269377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:43,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:28:43,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-01-30 22:28:43,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933517584] [2022-01-30 22:28:43,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:43,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-30 22:28:43,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:43,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-30 22:28:43,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1081, Unknown=2, NotChecked=0, Total=1190 [2022-01-30 22:28:43,897 INFO L87 Difference]: Start difference. First operand 1783 states and 2637 transitions. Second operand has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 26 states have internal predecessors, (100), 19 states have call successors, (31), 5 states have call predecessors, (31), 2 states have return successors, (27), 17 states have call predecessors, (27), 17 states have call successors, (27) [2022-01-30 22:28:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:45,881 INFO L93 Difference]: Finished difference Result 2115 states and 3019 transitions. [2022-01-30 22:28:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-30 22:28:45,882 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 26 states have internal predecessors, (100), 19 states have call successors, (31), 5 states have call predecessors, (31), 2 states have return successors, (27), 17 states have call predecessors, (27), 17 states have call successors, (27) Word has length 105 [2022-01-30 22:28:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:45,888 INFO L225 Difference]: With dead ends: 2115 [2022-01-30 22:28:45,888 INFO L226 Difference]: Without dead ends: 2113 [2022-01-30 22:28:45,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 153 SyntacticMatches, 19 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=359, Invalid=3299, Unknown=2, NotChecked=0, Total=3660 [2022-01-30 22:28:45,889 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 201 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:45,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 787 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1758 Invalid, 0 Unknown, 156 Unchecked, 0.7s Time] [2022-01-30 22:28:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2022-01-30 22:28:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1499. [2022-01-30 22:28:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1089 states have (on average 1.292929292929293) internal successors, (1408), 1116 states have internal predecessors, (1408), 354 states have call successors, (354), 58 states have call predecessors, (354), 55 states have return successors, (353), 324 states have call predecessors, (353), 353 states have call successors, (353) [2022-01-30 22:28:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 2115 transitions. [2022-01-30 22:28:46,553 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 2115 transitions. Word has length 105 [2022-01-30 22:28:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:46,554 INFO L470 AbstractCegarLoop]: Abstraction has 1499 states and 2115 transitions. [2022-01-30 22:28:46,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 26 states have internal predecessors, (100), 19 states have call successors, (31), 5 states have call predecessors, (31), 2 states have return successors, (27), 17 states have call predecessors, (27), 17 states have call successors, (27) [2022-01-30 22:28:46,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 2115 transitions. [2022-01-30 22:28:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-30 22:28:46,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:46,557 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:46,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:46,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:46,768 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:46,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:46,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1954687822, now seen corresponding path program 7 times [2022-01-30 22:28:46,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:46,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167174660] [2022-01-30 22:28:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:46,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:28:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:28:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:28:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:28:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-30 22:28:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:28:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:28:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-30 22:28:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-30 22:28:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-30 22:28:47,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:47,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167174660] [2022-01-30 22:28:47,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167174660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:47,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177251428] [2022-01-30 22:28:47,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 22:28:47,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:47,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:47,075 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:28:47,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-30 22:28:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:47,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-30 22:28:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 84 proven. 13 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-30 22:28:47,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 84 proven. 13 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-30 22:28:48,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177251428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:48,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:48,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 40 [2022-01-30 22:28:48,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251915202] [2022-01-30 22:28:48,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:48,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-30 22:28:48,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-30 22:28:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2022-01-30 22:28:48,197 INFO L87 Difference]: Start difference. First operand 1499 states and 2115 transitions. Second operand has 40 states, 40 states have (on average 3.55) internal successors, (142), 39 states have internal predecessors, (142), 29 states have call successors, (43), 5 states have call predecessors, (43), 3 states have return successors, (40), 28 states have call predecessors, (40), 28 states have call successors, (40) [2022-01-30 22:28:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:49,385 INFO L93 Difference]: Finished difference Result 1638 states and 2248 transitions. [2022-01-30 22:28:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-30 22:28:49,386 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.55) internal successors, (142), 39 states have internal predecessors, (142), 29 states have call successors, (43), 5 states have call predecessors, (43), 3 states have return successors, (40), 28 states have call predecessors, (40), 28 states have call successors, (40) Word has length 109 [2022-01-30 22:28:49,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:49,389 INFO L225 Difference]: With dead ends: 1638 [2022-01-30 22:28:49,389 INFO L226 Difference]: Without dead ends: 1359 [2022-01-30 22:28:49,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=559, Invalid=1891, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 22:28:49,390 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 286 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:49,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 164 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 22:28:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2022-01-30 22:28:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1303. [2022-01-30 22:28:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 945 states have (on average 1.3206349206349206) internal successors, (1248), 961 states have internal predecessors, (1248), 321 states have call successors, (321), 39 states have call predecessors, (321), 36 states have return successors, (320), 302 states have call predecessors, (320), 320 states have call successors, (320) [2022-01-30 22:28:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1889 transitions. [2022-01-30 22:28:49,978 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1889 transitions. Word has length 109 [2022-01-30 22:28:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:49,978 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 1889 transitions. [2022-01-30 22:28:49,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.55) internal successors, (142), 39 states have internal predecessors, (142), 29 states have call successors, (43), 5 states have call predecessors, (43), 3 states have return successors, (40), 28 states have call predecessors, (40), 28 states have call successors, (40) [2022-01-30 22:28:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1889 transitions. [2022-01-30 22:28:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-30 22:28:49,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:49,981 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:49,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-30 22:28:50,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:50,198 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1585802074, now seen corresponding path program 3 times [2022-01-30 22:28:50,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:50,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541598896] [2022-01-30 22:28:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:50,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:28:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:28:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:28:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:28:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:28:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:28:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:28:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:28:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:28:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:28:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-30 22:28:50,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:50,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541598896] [2022-01-30 22:28:50,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541598896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:50,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572314648] [2022-01-30 22:28:50,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:28:50,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:50,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:50,431 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:28:50,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-30 22:28:50,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-30 22:28:50,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:28:50,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-30 22:28:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:50,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:28:50,935 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:28:50,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:51,027 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:28:51,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:28:51,096 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:28:51,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:28:51,160 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:28:51,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:28:51,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-30 22:28:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-30 22:28:51,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:54,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572314648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:54,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:28:54,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2022-01-30 22:28:54,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056452687] [2022-01-30 22:28:54,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:54,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-30 22:28:54,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-30 22:28:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1256, Unknown=2, NotChecked=0, Total=1406 [2022-01-30 22:28:54,289 INFO L87 Difference]: Start difference. First operand 1303 states and 1889 transitions. Second operand has 31 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 28 states have internal predecessors, (106), 21 states have call successors, (33), 5 states have call predecessors, (33), 2 states have return successors, (29), 19 states have call predecessors, (29), 19 states have call successors, (29) [2022-01-30 22:28:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:58,806 INFO L93 Difference]: Finished difference Result 2123 states and 3071 transitions. [2022-01-30 22:28:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-30 22:28:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 28 states have internal predecessors, (106), 21 states have call successors, (33), 5 states have call predecessors, (33), 2 states have return successors, (29), 19 states have call predecessors, (29), 19 states have call successors, (29) Word has length 113 [2022-01-30 22:28:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:58,813 INFO L225 Difference]: With dead ends: 2123 [2022-01-30 22:28:58,813 INFO L226 Difference]: Without dead ends: 2121 [2022-01-30 22:28:58,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 159 SyntacticMatches, 18 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1661 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=461, Invalid=4228, Unknown=3, NotChecked=0, Total=4692 [2022-01-30 22:28:58,814 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 183 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 2673 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 2673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:58,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1023 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 2673 Invalid, 0 Unknown, 254 Unchecked, 1.1s Time] [2022-01-30 22:28:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2022-01-30 22:28:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1587. [2022-01-30 22:28:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1150 states have (on average 1.3469565217391304) internal successors, (1549), 1167 states have internal predecessors, (1549), 393 states have call successors, (393), 45 states have call predecessors, (393), 43 states have return successors, (392), 374 states have call predecessors, (392), 392 states have call successors, (392) [2022-01-30 22:28:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2334 transitions. [2022-01-30 22:28:59,599 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2334 transitions. Word has length 113 [2022-01-30 22:28:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:59,599 INFO L470 AbstractCegarLoop]: Abstraction has 1587 states and 2334 transitions. [2022-01-30 22:28:59,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 28 states have internal predecessors, (106), 21 states have call successors, (33), 5 states have call predecessors, (33), 2 states have return successors, (29), 19 states have call predecessors, (29), 19 states have call successors, (29) [2022-01-30 22:28:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2334 transitions. [2022-01-30 22:28:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-30 22:28:59,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:59,603 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:59,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-30 22:28:59,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-30 22:28:59,821 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:59,821 INFO L85 PathProgramCache]: Analyzing trace with hash 374855842, now seen corresponding path program 8 times [2022-01-30 22:28:59,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:59,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862137785] [2022-01-30 22:28:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:59,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:29:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:29:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:29:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:29:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:29:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:29:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:29:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:29:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:29:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:29:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:29:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:29:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:29:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:29:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:29:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:29:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 22:29:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:29:00,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:00,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862137785] [2022-01-30 22:29:00,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862137785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:00,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779806445] [2022-01-30 22:29:00,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:29:00,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:00,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:00,053 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:29:00,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-30 22:29:00,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:29:00,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:00,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-30 22:29:00,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:00,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:29:00,274 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:29:00,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:29:00,301 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:29:00,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:29:00,529 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:29:00,529 INFO L387 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 25 treesize of output 11 [2022-01-30 22:29:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:29:00,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:00,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-30 22:29:00,703 INFO L387 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 30 treesize of output 26 [2022-01-30 22:29:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:29:00,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779806445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:00,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:29:00,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 26 [2022-01-30 22:29:00,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277845754] [2022-01-30 22:29:00,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:00,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 22:29:00,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 22:29:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-01-30 22:29:00,814 INFO L87 Difference]: Start difference. First operand 1587 states and 2334 transitions. Second operand has 26 states, 25 states have (on average 3.72) internal successors, (93), 23 states have internal predecessors, (93), 18 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 17 states have call predecessors, (25), 17 states have call successors, (25) [2022-01-30 22:29:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:21,090 INFO L93 Difference]: Finished difference Result 17831 states and 28240 transitions. [2022-01-30 22:29:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-01-30 22:29:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.72) internal successors, (93), 23 states have internal predecessors, (93), 18 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 17 states have call predecessors, (25), 17 states have call successors, (25) Word has length 129 [2022-01-30 22:29:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:21,127 INFO L225 Difference]: With dead ends: 17831 [2022-01-30 22:29:21,128 INFO L226 Difference]: Without dead ends: 17829 [2022-01-30 22:29:21,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 278 SyntacticMatches, 9 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29144 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4805, Invalid=63055, Unknown=0, NotChecked=0, Total=67860 [2022-01-30 22:29:21,136 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 472 mSDsluCounter, 2672 mSDsCounter, 0 mSdLazyCounter, 14139 mSolverCounterSat, 2452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 3405 SdHoareTripleChecker+Invalid, 16591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2452 IncrementalHoareTripleChecker+Valid, 14139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:21,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 3405 Invalid, 16591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2452 Valid, 14139 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-01-30 22:29:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17829 states. [2022-01-30 22:29:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17829 to 2835. [2022-01-30 22:29:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2064 states have (on average 1.3493217054263567) internal successors, (2785), 2102 states have internal predecessors, (2785), 723 states have call successors, (723), 49 states have call predecessors, (723), 47 states have return successors, (722), 683 states have call predecessors, (722), 722 states have call successors, (722) [2022-01-30 22:29:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 4230 transitions. [2022-01-30 22:29:22,752 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 4230 transitions. Word has length 129 [2022-01-30 22:29:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:22,752 INFO L470 AbstractCegarLoop]: Abstraction has 2835 states and 4230 transitions. [2022-01-30 22:29:22,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.72) internal successors, (93), 23 states have internal predecessors, (93), 18 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 17 states have call predecessors, (25), 17 states have call successors, (25) [2022-01-30 22:29:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 4230 transitions. [2022-01-30 22:29:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-30 22:29:22,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:22,758 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:22,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:22,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-30 22:29:22,971 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash -117770332, now seen corresponding path program 2 times [2022-01-30 22:29:22,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:22,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138988985] [2022-01-30 22:29:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:22,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:29:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:29:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:29:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:29:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:29:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:29:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:29:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:29:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:29:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:29:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:29:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:29:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:29:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:29:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:29:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:29:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 22:29:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:29:23,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:23,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138988985] [2022-01-30 22:29:23,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138988985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:23,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363005299] [2022-01-30 22:29:23,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:29:23,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:23,209 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:29:23,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-30 22:29:23,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:29:23,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:23,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-30 22:29:23,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:23,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:29:23,601 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:29:23,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:23,664 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:29:23,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:29:24,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-30 22:29:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-30 22:29:24,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:27,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-01-30 22:29:27,087 INFO L387 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 32 [2022-01-30 22:29:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:29:27,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363005299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:27,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:29:27,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 47 [2022-01-30 22:29:27,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574478806] [2022-01-30 22:29:27,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:27,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-30 22:29:27,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:27,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-30 22:29:27,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1995, Unknown=1, NotChecked=0, Total=2162 [2022-01-30 22:29:27,311 INFO L87 Difference]: Start difference. First operand 2835 states and 4230 transitions. Second operand has 47 states, 45 states have (on average 3.688888888888889) internal successors, (166), 44 states have internal predecessors, (166), 35 states have call successors, (54), 5 states have call predecessors, (54), 2 states have return successors, (49), 33 states have call predecessors, (49), 33 states have call successors, (49) [2022-01-30 22:32:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:32:16,040 INFO L93 Difference]: Finished difference Result 12480 states and 19415 transitions. [2022-01-30 22:32:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-01-30 22:32:16,041 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 3.688888888888889) internal successors, (166), 44 states have internal predecessors, (166), 35 states have call successors, (54), 5 states have call predecessors, (54), 2 states have return successors, (49), 33 states have call predecessors, (49), 33 states have call successors, (49) Word has length 129 [2022-01-30 22:32:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:32:16,070 INFO L225 Difference]: With dead ends: 12480 [2022-01-30 22:32:16,070 INFO L226 Difference]: Without dead ends: 12478 [2022-01-30 22:32:16,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 254 SyntacticMatches, 19 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20414 ImplicationChecksByTransitivity, 159.7s TimeCoverageRelationStatistics Valid=5941, Invalid=45281, Unknown=80, NotChecked=0, Total=51302 [2022-01-30 22:32:16,077 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 1144 mSDsluCounter, 2101 mSDsCounter, 0 mSdLazyCounter, 10173 mSolverCounterSat, 3179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 2510 SdHoareTripleChecker+Invalid, 14054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3179 IncrementalHoareTripleChecker+Valid, 10173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 702 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:32:16,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1167 Valid, 2510 Invalid, 14054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3179 Valid, 10173 Invalid, 0 Unknown, 702 Unchecked, 5.0s Time] [2022-01-30 22:32:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12478 states. [2022-01-30 22:32:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12478 to 3558. [2022-01-30 22:32:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 2600 states have (on average 1.3442307692307693) internal successors, (3495), 2647 states have internal predecessors, (3495), 888 states have call successors, (888), 72 states have call predecessors, (888), 69 states have return successors, (887), 838 states have call predecessors, (887), 887 states have call successors, (887) [2022-01-30 22:32:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 5270 transitions. [2022-01-30 22:32:18,107 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 5270 transitions. Word has length 129 [2022-01-30 22:32:18,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:32:18,107 INFO L470 AbstractCegarLoop]: Abstraction has 3558 states and 5270 transitions. [2022-01-30 22:32:18,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 3.688888888888889) internal successors, (166), 44 states have internal predecessors, (166), 35 states have call successors, (54), 5 states have call predecessors, (54), 2 states have return successors, (49), 33 states have call predecessors, (49), 33 states have call successors, (49) [2022-01-30 22:32:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 5270 transitions. [2022-01-30 22:32:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-30 22:32:18,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:32:18,113 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:32:18,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-30 22:32:18,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:32:18,331 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:32:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:32:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash 878407372, now seen corresponding path program 4 times [2022-01-30 22:32:18,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:32:18,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977741613] [2022-01-30 22:32:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:32:18,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:32:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:32:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:32:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:32:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:32:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:32:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:32:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:32:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:32:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:32:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:32:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:32:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-30 22:32:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-30 22:32:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-30 22:32:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-30 22:32:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-30 22:32:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-30 22:32:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-30 22:32:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 8 proven. 102 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-01-30 22:32:18,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:32:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977741613] [2022-01-30 22:32:18,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977741613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:32:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663597412] [2022-01-30 22:32:18,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:32:18,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:32:18,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:32:18,608 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:32:18,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-30 22:32:18,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:32:18,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:32:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-30 22:32:18,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:32:18,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:32:18,970 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:32:18,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:32:19,063 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:32:19,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:32:19,125 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:32:19,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:32:19,186 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:32:19,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:32:19,275 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:32:19,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:32:19,341 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:32:19,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:32:19,403 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:32:19,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:32:19,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-30 22:32:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 115 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-01-30 22:32:19,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:32:20,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663597412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:32:20,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:32:20,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2022-01-30 22:32:20,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753945973] [2022-01-30 22:32:20,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:32:20,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-30 22:32:20,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:32:20,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-30 22:32:20,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1393, Unknown=1, NotChecked=0, Total=1560 [2022-01-30 22:32:20,611 INFO L87 Difference]: Start difference. First operand 3558 states and 5270 transitions. Second operand has 33 states, 31 states have (on average 3.935483870967742) internal successors, (122), 30 states have internal predecessors, (122), 23 states have call successors, (39), 5 states have call predecessors, (39), 2 states have return successors, (35), 21 states have call predecessors, (35), 21 states have call successors, (35) [2022-01-30 22:32:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:32:26,392 INFO L93 Difference]: Finished difference Result 4703 states and 6854 transitions. [2022-01-30 22:32:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-30 22:32:26,393 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.935483870967742) internal successors, (122), 30 states have internal predecessors, (122), 23 states have call successors, (39), 5 states have call predecessors, (39), 2 states have return successors, (35), 21 states have call predecessors, (35), 21 states have call successors, (35) Word has length 133 [2022-01-30 22:32:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:32:26,402 INFO L225 Difference]: With dead ends: 4703 [2022-01-30 22:32:26,402 INFO L226 Difference]: Without dead ends: 4701 [2022-01-30 22:32:26,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 183 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=478, Invalid=4490, Unknown=2, NotChecked=0, Total=4970 [2022-01-30 22:32:26,404 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 228 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-30 22:32:26,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 824 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2260 Invalid, 0 Unknown, 245 Unchecked, 0.9s Time] [2022-01-30 22:32:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2022-01-30 22:32:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 2040. [2022-01-30 22:32:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 1488 states have (on average 1.3293010752688172) internal successors, (1978), 1512 states have internal predecessors, (1978), 487 states have call successors, (487), 66 states have call predecessors, (487), 64 states have return successors, (486), 461 states have call predecessors, (486), 486 states have call successors, (486) [2022-01-30 22:32:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2951 transitions. [2022-01-30 22:32:27,587 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2951 transitions. Word has length 133 [2022-01-30 22:32:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:32:27,588 INFO L470 AbstractCegarLoop]: Abstraction has 2040 states and 2951 transitions. [2022-01-30 22:32:27,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.935483870967742) internal successors, (122), 30 states have internal predecessors, (122), 23 states have call successors, (39), 5 states have call predecessors, (39), 2 states have return successors, (35), 21 states have call predecessors, (35), 21 states have call successors, (35) [2022-01-30 22:32:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2951 transitions. [2022-01-30 22:32:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-30 22:32:27,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:32:27,593 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:32:27,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-30 22:32:27,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:32:27,807 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:32:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:32:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1504213895, now seen corresponding path program 9 times [2022-01-30 22:32:27,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:32:27,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561507557] [2022-01-30 22:32:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:32:27,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:32:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:32:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:32:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:32:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:32:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:32:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:32:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:32:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:32:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:32:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:32:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:32:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:28,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:32:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:32:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:28,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:32:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:28,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:32:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:28,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:32:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:28,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 22:32:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:28,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-30 22:32:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 14 proven. 134 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-30 22:32:28,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:32:28,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561507557] [2022-01-30 22:32:28,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561507557] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:32:28,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267174243] [2022-01-30 22:32:28,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:32:28,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:32:28,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:32:28,013 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:32:28,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-30 22:32:28,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-30 22:32:28,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:32:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-30 22:32:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:32:28,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:32:28,391 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:32:28,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:32:28,678 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:32:28,679 INFO L387 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 25 treesize of output 11 [2022-01-30 22:32:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 14 proven. 134 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-30 22:32:28,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:32:28,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-30 22:32:28,848 INFO L387 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 30 treesize of output 26 [2022-01-30 22:32:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 14 proven. 134 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-30 22:32:28,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267174243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:32:28,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:32:28,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 28 [2022-01-30 22:32:28,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680042138] [2022-01-30 22:32:28,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:32:28,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-30 22:32:28,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:32:28,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-30 22:32:28,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-01-30 22:32:28,968 INFO L87 Difference]: Start difference. First operand 2040 states and 2951 transitions. Second operand has 28 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 25 states have internal predecessors, (97), 20 states have call successors, (30), 4 states have call predecessors, (30), 1 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) [2022-01-30 22:33:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:33:23,138 INFO L93 Difference]: Finished difference Result 36733 states and 58413 transitions. [2022-01-30 22:33:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 525 states. [2022-01-30 22:33:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 25 states have internal predecessors, (97), 20 states have call successors, (30), 4 states have call predecessors, (30), 1 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) Word has length 137 [2022-01-30 22:33:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:33:23,223 INFO L225 Difference]: With dead ends: 36733 [2022-01-30 22:33:23,224 INFO L226 Difference]: Without dead ends: 36731 [2022-01-30 22:33:23,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 295 SyntacticMatches, 8 SemanticMatches, 531 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131170 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=14741, Invalid=268815, Unknown=0, NotChecked=0, Total=283556 [2022-01-30 22:33:23,246 INFO L933 BasicCegarLoop]: 1496 mSDtfsCounter, 670 mSDsluCounter, 6020 mSDsCounter, 0 mSdLazyCounter, 32716 mSolverCounterSat, 5117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 7516 SdHoareTripleChecker+Invalid, 37833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5117 IncrementalHoareTripleChecker+Valid, 32716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:33:23,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 7516 Invalid, 37833 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5117 Valid, 32716 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2022-01-30 22:33:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36731 states. [2022-01-30 22:33:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36731 to 3901. [2022-01-30 22:33:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 2851 states have (on average 1.3402314977200982) internal successors, (3821), 2904 states have internal predecessors, (3821), 980 states have call successors, (980), 71 states have call predecessors, (980), 69 states have return successors, (979), 925 states have call predecessors, (979), 979 states have call successors, (979) [2022-01-30 22:33:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 5780 transitions. [2022-01-30 22:33:26,353 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 5780 transitions. Word has length 137 [2022-01-30 22:33:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:33:26,353 INFO L470 AbstractCegarLoop]: Abstraction has 3901 states and 5780 transitions. [2022-01-30 22:33:26,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 25 states have internal predecessors, (97), 20 states have call successors, (30), 4 states have call predecessors, (30), 1 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) [2022-01-30 22:33:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 5780 transitions. [2022-01-30 22:33:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-30 22:33:26,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:33:26,359 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:33:26,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-30 22:33:26,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-30 22:33:26,559 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:33:26,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:33:26,560 INFO L85 PathProgramCache]: Analyzing trace with hash 536863241, now seen corresponding path program 5 times [2022-01-30 22:33:26,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:33:26,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710510788] [2022-01-30 22:33:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:33:26,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:33:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:33:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:33:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:33:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:33:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:33:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:33:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:33:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:33:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:33:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:33:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:33:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:33:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:33:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:33:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:33:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:33:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 22:33:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-30 22:33:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:33:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 14 proven. 134 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-30 22:33:26,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:33:26,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710510788] [2022-01-30 22:33:26,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710510788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:33:26,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524904251] [2022-01-30 22:33:26,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:33:26,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:33:26,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:33:26,789 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:33:26,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-30 22:33:26,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-30 22:33:26,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:33:26,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-30 22:33:26,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:33:27,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-30 22:33:27,243 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:33:27,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:33:27,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-30 22:33:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 24 proven. 148 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:33:27,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:33:30,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-01-30 22:33:30,255 INFO L387 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 32 [2022-01-30 22:33:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 14 proven. 134 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-30 22:33:30,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524904251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:33:30,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:33:30,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 50 [2022-01-30 22:33:30,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115562646] [2022-01-30 22:33:30,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:33:30,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 22:33:30,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:33:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 22:33:30,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2256, Unknown=1, NotChecked=0, Total=2450 [2022-01-30 22:33:30,484 INFO L87 Difference]: Start difference. First operand 3901 states and 5780 transitions. Second operand has 50 states, 48 states have (on average 3.6458333333333335) internal successors, (175), 47 states have internal predecessors, (175), 38 states have call successors, (57), 5 states have call predecessors, (57), 2 states have return successors, (52), 36 states have call predecessors, (52), 36 states have call successors, (52) [2022-01-30 22:36:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:36:43,081 INFO L93 Difference]: Finished difference Result 16414 states and 25521 transitions. [2022-01-30 22:36:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2022-01-30 22:36:43,082 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 3.6458333333333335) internal successors, (175), 47 states have internal predecessors, (175), 38 states have call successors, (57), 5 states have call predecessors, (57), 2 states have return successors, (52), 36 states have call predecessors, (52), 36 states have call successors, (52) Word has length 137 [2022-01-30 22:36:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:36:43,111 INFO L225 Difference]: With dead ends: 16414 [2022-01-30 22:36:43,111 INFO L226 Difference]: Without dead ends: 16412 [2022-01-30 22:36:43,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 273 SyntacticMatches, 18 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29497 ImplicationChecksByTransitivity, 176.3s TimeCoverageRelationStatistics Valid=7339, Invalid=64117, Unknown=100, NotChecked=0, Total=71556 [2022-01-30 22:36:43,118 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 1267 mSDsluCounter, 2608 mSDsCounter, 0 mSdLazyCounter, 13290 mSolverCounterSat, 3543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 3095 SdHoareTripleChecker+Invalid, 17650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3543 IncrementalHoareTripleChecker+Valid, 13290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 817 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:36:43,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1290 Valid, 3095 Invalid, 17650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3543 Valid, 13290 Invalid, 0 Unknown, 817 Unchecked, 6.2s Time] [2022-01-30 22:36:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16412 states. [2022-01-30 22:36:46,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16412 to 4568. [2022-01-30 22:36:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4568 states, 3357 states have (on average 1.330950253202264) internal successors, (4468), 3419 states have internal predecessors, (4468), 1110 states have call successors, (1110), 103 states have call predecessors, (1110), 100 states have return successors, (1109), 1045 states have call predecessors, (1109), 1109 states have call successors, (1109) [2022-01-30 22:36:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4568 states to 4568 states and 6687 transitions. [2022-01-30 22:36:46,394 INFO L78 Accepts]: Start accepts. Automaton has 4568 states and 6687 transitions. Word has length 137 [2022-01-30 22:36:46,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:36:46,394 INFO L470 AbstractCegarLoop]: Abstraction has 4568 states and 6687 transitions. [2022-01-30 22:36:46,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 3.6458333333333335) internal successors, (175), 47 states have internal predecessors, (175), 38 states have call successors, (57), 5 states have call predecessors, (57), 2 states have return successors, (52), 36 states have call predecessors, (52), 36 states have call successors, (52) [2022-01-30 22:36:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4568 states and 6687 transitions. [2022-01-30 22:36:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-30 22:36:46,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:36:46,401 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:36:46,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-30 22:36:46,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-30 22:36:46,615 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:36:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:36:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1013868908, now seen corresponding path program 10 times [2022-01-30 22:36:46,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:36:46,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894909841] [2022-01-30 22:36:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:36:46,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:36:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:36:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:36:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:36:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:36:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:36:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:36:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:36:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:36:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:36:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:36:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:36:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:36:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:36:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:36:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:36:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:36:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 22:36:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-30 22:36:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-01-30 22:36:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:36:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 16 proven. 164 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-01-30 22:36:46,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:36:46,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894909841] [2022-01-30 22:36:46,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894909841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:36:46,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797230339] [2022-01-30 22:36:46,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:36:46,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:36:46,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:36:46,837 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:36:46,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-30 22:36:46,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:36:46,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:36:46,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-30 22:36:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:36:47,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:36:47,437 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:36:47,438 INFO L387 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 25 treesize of output 11 [2022-01-30 22:36:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 16 proven. 164 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-01-30 22:36:47,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:36:47,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-01-30 22:36:47,616 INFO L387 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 30 treesize of output 26 [2022-01-30 22:36:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 16 proven. 164 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-01-30 22:36:47,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797230339] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:36:47,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:36:47,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 30 [2022-01-30 22:36:47,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758172633] [2022-01-30 22:36:47,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:36:47,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-30 22:36:47,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:36:47,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-30 22:36:47,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2022-01-30 22:36:47,745 INFO L87 Difference]: Start difference. First operand 4568 states and 6687 transitions. Second operand has 30 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 27 states have internal predecessors, (100), 21 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 20 states have call predecessors, (27), 20 states have call successors, (27) [2022-01-30 22:39:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:39:04,057 INFO L93 Difference]: Finished difference Result 102965 states and 164486 transitions. [2022-01-30 22:39:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 813 states. [2022-01-30 22:39:04,058 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 27 states have internal predecessors, (100), 21 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 20 states have call predecessors, (27), 20 states have call successors, (27) Word has length 145 [2022-01-30 22:39:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:39:04,350 INFO L225 Difference]: With dead ends: 102965 [2022-01-30 22:39:04,350 INFO L226 Difference]: Without dead ends: 102963 [2022-01-30 22:39:04,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 312 SyntacticMatches, 7 SemanticMatches, 820 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319688 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=27016, Invalid=647846, Unknown=0, NotChecked=0, Total=674862 [2022-01-30 22:39:04,412 INFO L933 BasicCegarLoop]: 2327 mSDtfsCounter, 793 mSDsluCounter, 8903 mSDsCounter, 0 mSdLazyCounter, 51360 mSolverCounterSat, 7867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 11230 SdHoareTripleChecker+Invalid, 59227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7867 IncrementalHoareTripleChecker+Valid, 51360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2022-01-30 22:39:04,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 11230 Invalid, 59227 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7867 Valid, 51360 Invalid, 0 Unknown, 0 Unchecked, 24.8s Time] [2022-01-30 22:39:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102963 states. [2022-01-30 22:39:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102963 to 9661. [2022-01-30 22:39:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9661 states, 7065 states have (on average 1.3477707006369426) internal successors, (9522), 7200 states have internal predecessors, (9522), 2486 states have call successors, (2486), 112 states have call predecessors, (2486), 109 states have return successors, (2485), 2348 states have call predecessors, (2485), 2485 states have call successors, (2485) [2022-01-30 22:39:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9661 states to 9661 states and 14493 transitions. [2022-01-30 22:39:13,633 INFO L78 Accepts]: Start accepts. Automaton has 9661 states and 14493 transitions. Word has length 145 [2022-01-30 22:39:13,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:39:13,634 INFO L470 AbstractCegarLoop]: Abstraction has 9661 states and 14493 transitions. [2022-01-30 22:39:13,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 27 states have internal predecessors, (100), 21 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 20 states have call predecessors, (27), 20 states have call successors, (27) [2022-01-30 22:39:13,634 INFO L276 IsEmpty]: Start isEmpty. Operand 9661 states and 14493 transitions. [2022-01-30 22:39:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-30 22:39:13,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:39:13,645 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:39:13,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-30 22:39:13,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-30 22:39:13,859 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:39:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:39:13,860 INFO L85 PathProgramCache]: Analyzing trace with hash -897173650, now seen corresponding path program 2 times [2022-01-30 22:39:13,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:39:13,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227679258] [2022-01-30 22:39:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:39:13,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:39:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:39:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:39:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:39:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:39:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:39:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-30 22:39:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:39:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:39:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 22:39:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 22:39:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:39:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:39:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:39:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:39:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:39:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:39:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 22:39:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-30 22:39:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-01-30 22:39:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:39:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 16 proven. 164 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-01-30 22:39:14,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:39:14,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227679258] [2022-01-30 22:39:14,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227679258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:39:14,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354753372] [2022-01-30 22:39:14,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:39:14,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:39:14,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:39:14,133 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:39:14,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-30 22:39:14,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:39:14,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:39:14,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-30 22:39:14,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:39:14,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-01-30 22:39:15,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-01-30 22:39:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-01-30 22:39:15,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:39:17,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-01-30 22:39:17,727 INFO L387 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 32 [2022-01-30 22:39:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 16 proven. 164 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-01-30 22:39:17,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354753372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:39:17,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:39:17,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 19] total 53 [2022-01-30 22:39:17,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523785637] [2022-01-30 22:39:17,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:39:17,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-30 22:39:17,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:39:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-30 22:39:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2563, Unknown=1, NotChecked=0, Total=2756 [2022-01-30 22:39:17,987 INFO L87 Difference]: Start difference. First operand 9661 states and 14493 transitions. Second operand has 53 states, 51 states have (on average 3.5686274509803924) internal successors, (182), 50 states have internal predecessors, (182), 39 states have call successors, (60), 5 states have call predecessors, (60), 2 states have return successors, (55), 37 states have call predecessors, (55), 37 states have call successors, (55)