./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/brs5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:25:02,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:25:02,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:25:02,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:25:02,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:25:02,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:25:02,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:25:02,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:25:02,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:25:02,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:25:02,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:25:02,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:25:02,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:25:02,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:25:02,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:25:02,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:25:02,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:25:02,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:25:02,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:25:02,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:25:02,123 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:25:02,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:25:02,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:25:02,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:25:02,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:25:02,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:25:02,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:25:02,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:25:02,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:25:02,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:25:02,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:25:02,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:25:02,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:25:02,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:25:02,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:25:02,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:25:02,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:25:02,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:25:02,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:25:02,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:25:02,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:25:02,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:25:02,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:25:02,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:25:02,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:25:02,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:25:02,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:25:02,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:25:02,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:25:02,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:25:02,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:25:02,163 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:25:02,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:25:02,164 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:25:02,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:25:02,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:25:02,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:25:02,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:25:02,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:25:02,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:25:02,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:25:02,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:25:02,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:25:02,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:25:02,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:25:02,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:25:02,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:25:02,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:25:02,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:25:02,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:25:02,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:25:02,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:25:02,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:25:02,168 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:25:02,168 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:25:02,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:25:02,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 [2022-07-19 10:25:02,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:25:02,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:25:02,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:25:02,390 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:25:02,391 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:25:02,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs5.c [2022-07-19 10:25:02,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52e406658/3dfb1886d8d7468daf8ac1412449559a/FLAG6f3dcbf6d [2022-07-19 10:25:02,789 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:25:02,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c [2022-07-19 10:25:02,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52e406658/3dfb1886d8d7468daf8ac1412449559a/FLAG6f3dcbf6d [2022-07-19 10:25:02,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52e406658/3dfb1886d8d7468daf8ac1412449559a [2022-07-19 10:25:02,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:25:02,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:25:02,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:25:02,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:25:02,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:25:02,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:25:02" (1/1) ... [2022-07-19 10:25:02,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd87d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:02, skipping insertion in model container [2022-07-19 10:25:02,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:25:02" (1/1) ... [2022-07-19 10:25:02,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:25:02,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:25:02,937 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c[587,600] [2022-07-19 10:25:02,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:25:02,979 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:25:02,988 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c[587,600] [2022-07-19 10:25:02,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:25:03,006 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:25:03,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03 WrapperNode [2022-07-19 10:25:03,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:25:03,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:25:03,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:25:03,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:25:03,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (1/1) ... [2022-07-19 10:25:03,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (1/1) ... [2022-07-19 10:25:03,039 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-07-19 10:25:03,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:25:03,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:25:03,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:25:03,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:25:03,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (1/1) ... [2022-07-19 10:25:03,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (1/1) ... [2022-07-19 10:25:03,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (1/1) ... [2022-07-19 10:25:03,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (1/1) ... [2022-07-19 10:25:03,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (1/1) ... [2022-07-19 10:25:03,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (1/1) ... [2022-07-19 10:25:03,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (1/1) ... [2022-07-19 10:25:03,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:25:03,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:25:03,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:25:03,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:25:03,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (1/1) ... [2022-07-19 10:25:03,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:25:03,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:25:03,109 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) [2022-07-19 10:25:03,128 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 [2022-07-19 10:25:03,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:25:03,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:25:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:25:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:25:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:25:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:25:03,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:25:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:25:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:25:03,184 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:25:03,186 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:25:03,327 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:25:03,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:25:03,331 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 10:25:03,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:25:03 BoogieIcfgContainer [2022-07-19 10:25:03,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:25:03,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:25:03,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:25:03,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:25:03,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:25:02" (1/3) ... [2022-07-19 10:25:03,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346b0574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:25:03, skipping insertion in model container [2022-07-19 10:25:03,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:25:03" (2/3) ... [2022-07-19 10:25:03,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346b0574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:25:03, skipping insertion in model container [2022-07-19 10:25:03,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:25:03" (3/3) ... [2022-07-19 10:25:03,339 INFO L111 eAbstractionObserver]: Analyzing ICFG brs5.c [2022-07-19 10:25:03,361 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:25:03,362 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:25:03,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:25:03,396 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cc59d1c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@509426a9 [2022-07-19 10:25:03,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:25:03,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:25:03,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:03,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:03,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2022-07-19 10:25:03,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:03,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683875726] [2022-07-19 10:25:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:03,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:03,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:03,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683875726] [2022-07-19 10:25:03,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683875726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:25:03,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:25:03,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:25:03,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097872046] [2022-07-19 10:25:03,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:25:03,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:25:03,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:25:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:25:03,593 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:03,604 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-07-19 10:25:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:25:03,606 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 10:25:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:03,610 INFO L225 Difference]: With dead ends: 36 [2022-07-19 10:25:03,610 INFO L226 Difference]: Without dead ends: 16 [2022-07-19 10:25:03,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:25:03,616 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:03,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:25:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-19 10:25:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-19 10:25:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-19 10:25:03,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-07-19 10:25:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:03,638 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-19 10:25:03,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-19 10:25:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:25:03,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:03,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:03,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:25:03,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:03,640 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2022-07-19 10:25:03,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:03,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405613506] [2022-07-19 10:25:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:03,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:03,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:03,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405613506] [2022-07-19 10:25:03,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405613506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:25:03,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:25:03,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:25:03,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197094419] [2022-07-19 10:25:03,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:25:03,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:25:03,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:25:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:25:03,714 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:03,770 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-07-19 10:25:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:25:03,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 10:25:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:03,771 INFO L225 Difference]: With dead ends: 33 [2022-07-19 10:25:03,772 INFO L226 Difference]: Without dead ends: 22 [2022-07-19 10:25:03,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:25:03,773 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:03,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:25:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-19 10:25:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-07-19 10:25:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-19 10:25:03,781 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2022-07-19 10:25:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:03,782 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-19 10:25:03,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-19 10:25:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 10:25:03,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:03,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:03,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:25:03,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:03,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2022-07-19 10:25:03,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:03,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118870365] [2022-07-19 10:25:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:03,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:25:03,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:03,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118870365] [2022-07-19 10:25:03,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118870365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:25:03,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:25:03,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:25:03,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686302046] [2022-07-19 10:25:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:25:03,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:25:03,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:25:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:25:03,884 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:03,936 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-07-19 10:25:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:25:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 10:25:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:03,938 INFO L225 Difference]: With dead ends: 27 [2022-07-19 10:25:03,939 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 10:25:03,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:25:03,945 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:03,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:25:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 10:25:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-19 10:25:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-19 10:25:03,953 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-07-19 10:25:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:03,953 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-19 10:25:03,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-19 10:25:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:25:03,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:03,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:03,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 10:25:03,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:03,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2022-07-19 10:25:03,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:03,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859401169] [2022-07-19 10:25:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:03,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:04,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859401169] [2022-07-19 10:25:04,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859401169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:25:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241202884] [2022-07-19 10:25:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:04,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:04,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:25:04,070 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) [2022-07-19 10:25:04,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:25:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:25:04,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:25:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:04,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:25:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:04,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241202884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:25:04,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:25:04,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-19 10:25:04,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224227246] [2022-07-19 10:25:04,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:25:04,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:25:04,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:04,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:25:04,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:25:04,266 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:04,377 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-07-19 10:25:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:25:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 10:25:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:04,378 INFO L225 Difference]: With dead ends: 43 [2022-07-19 10:25:04,378 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 10:25:04,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:25:04,379 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:04,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:25:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 10:25:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-07-19 10:25:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-19 10:25:04,383 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2022-07-19 10:25:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:04,383 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-19 10:25:04,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-19 10:25:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 10:25:04,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:04,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:04,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:25:04,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:04,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2022-07-19 10:25:04,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:04,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480925275] [2022-07-19 10:25:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:04,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:04,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:04,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480925275] [2022-07-19 10:25:04,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480925275] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:25:04,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192194328] [2022-07-19 10:25:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:04,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:04,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:25:04,982 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) [2022-07-19 10:25:05,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:25:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:05,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 10:25:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:25:05,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:25:05,100 INFO L390 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 21 treesize of output 17 [2022-07-19 10:25:05,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 10:25:05,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-19 10:25:05,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-07-19 10:25:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:05,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:25:07,987 INFO L390 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 222 treesize of output 210 [2022-07-19 10:25:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:08,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192194328] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:25:08,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:25:08,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-07-19 10:25:08,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025944760] [2022-07-19 10:25:08,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:25:08,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 10:25:08,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:08,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 10:25:08,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=570, Unknown=2, NotChecked=0, Total=702 [2022-07-19 10:25:08,158 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:08,343 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-07-19 10:25:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 10:25:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-19 10:25:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:08,345 INFO L225 Difference]: With dead ends: 61 [2022-07-19 10:25:08,345 INFO L226 Difference]: Without dead ends: 41 [2022-07-19 10:25:08,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=174, Invalid=754, Unknown=2, NotChecked=0, Total=930 [2022-07-19 10:25:08,346 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:08,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 168 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-07-19 10:25:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-19 10:25:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-07-19 10:25:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-07-19 10:25:08,351 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 23 [2022-07-19 10:25:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:08,351 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-07-19 10:25:08,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-07-19 10:25:08,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 10:25:08,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:08,353 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:08,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:25:08,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:08,568 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2022-07-19 10:25:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:08,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298882229] [2022-07-19 10:25:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:08,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:08,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:08,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298882229] [2022-07-19 10:25:08,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298882229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:25:08,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140457810] [2022-07-19 10:25:08,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:25:08,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:25:08,620 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) [2022-07-19 10:25:08,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:25:08,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:25:08,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:25:08,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 10:25:08,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:25:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:08,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:25:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:08,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140457810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:25:08,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:25:08,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 10:25:08,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629461939] [2022-07-19 10:25:08,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:25:08,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:25:08,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:08,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:25:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:25:08,755 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:08,877 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-07-19 10:25:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 10:25:08,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 10:25:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:08,878 INFO L225 Difference]: With dead ends: 81 [2022-07-19 10:25:08,879 INFO L226 Difference]: Without dead ends: 55 [2022-07-19 10:25:08,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:25:08,880 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:08,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 40 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:25:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-19 10:25:08,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2022-07-19 10:25:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-19 10:25:08,884 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 26 [2022-07-19 10:25:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:08,884 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-19 10:25:08,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-19 10:25:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 10:25:08,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:08,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:08,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 10:25:09,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:09,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:09,102 INFO L85 PathProgramCache]: Analyzing trace with hash 719394766, now seen corresponding path program 3 times [2022-07-19 10:25:09,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:09,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729874558] [2022-07-19 10:25:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:09,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:09,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729874558] [2022-07-19 10:25:09,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729874558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:25:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310201206] [2022-07-19 10:25:09,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:25:09,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:09,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:25:09,196 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) [2022-07-19 10:25:09,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:25:09,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:25:09,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:25:09,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 10:25:09,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:25:09,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:25:09,368 INFO L390 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 15 treesize of output 11 [2022-07-19 10:25:09,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 10:25:09,596 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-19 10:25:09,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2022-07-19 10:25:09,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:25:09,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2022-07-19 10:25:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 10:25:09,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:25:11,177 INFO L390 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 100 treesize of output 94 [2022-07-19 10:25:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 10:25:11,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310201206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:25:11,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:25:11,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 14] total 34 [2022-07-19 10:25:11,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410933118] [2022-07-19 10:25:11,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:25:11,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 10:25:11,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:11,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 10:25:11,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=908, Unknown=1, NotChecked=0, Total=1122 [2022-07-19 10:25:11,227 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:11,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:11,625 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2022-07-19 10:25:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 10:25:11,625 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 10:25:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:11,626 INFO L225 Difference]: With dead ends: 71 [2022-07-19 10:25:11,626 INFO L226 Difference]: Without dead ends: 57 [2022-07-19 10:25:11,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=481, Invalid=1968, Unknown=1, NotChecked=0, Total=2450 [2022-07-19 10:25:11,627 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:11,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 64 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 77 Unchecked, 0.0s Time] [2022-07-19 10:25:11,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-19 10:25:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2022-07-19 10:25:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:11,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-19 10:25:11,632 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 26 [2022-07-19 10:25:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:11,632 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-19 10:25:11,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-19 10:25:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 10:25:11,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:11,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:11,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:25:11,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:11,840 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:11,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1198950171, now seen corresponding path program 4 times [2022-07-19 10:25:11,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:11,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366260492] [2022-07-19 10:25:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:11,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:12,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366260492] [2022-07-19 10:25:12,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366260492] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:25:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347706036] [2022-07-19 10:25:12,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:25:12,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:12,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:25:12,261 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) [2022-07-19 10:25:12,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:25:12,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:25:12,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:25:12,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 10:25:12,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:25:12,342 INFO L390 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 15 treesize of output 11 [2022-07-19 10:25:12,422 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 10:25:12,422 INFO L390 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 [2022-07-19 10:25:12,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:12,508 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-19 10:25:12,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-07-19 10:25:12,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:12,613 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-07-19 10:25:12,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2022-07-19 10:25:12,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:12,711 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-19 10:25:12,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-07-19 10:25:12,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:12,825 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-19 10:25:12,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 15 [2022-07-19 10:25:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:12,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:25:21,061 WARN L833 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (forall ((v_ArrVal_179 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_183 Int) (v_ArrVal_182 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_179)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_179 0)) (<= (+ v_ArrVal_183 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_183)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* 5 ~N~0)) (not (<= v_ArrVal_183 (+ v_ArrVal_182 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_182)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_182 0)))))) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false [2022-07-19 10:25:22,507 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_179 Int) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_183 Int) (v_ArrVal_182 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_179)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (<= (+ v_ArrVal_183 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_183)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* 5 ~N~0)) (not (<= v_ArrVal_179 0)) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)) (not (<= v_ArrVal_183 (+ v_ArrVal_182 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_182)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_182 0)))))) is different from false [2022-07-19 10:25:22,524 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-19 10:25:22,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2056 treesize of output 2002 [2022-07-19 10:25:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-07-19 10:25:22,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347706036] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:25:22,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:25:22,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 44 [2022-07-19 10:25:22,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47627614] [2022-07-19 10:25:22,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:25:22,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 10:25:22,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:22,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 10:25:22,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1512, Unknown=5, NotChecked=162, Total=1892 [2022-07-19 10:25:22,910 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:29,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:29,378 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2022-07-19 10:25:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-19 10:25:29,378 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-19 10:25:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:29,379 INFO L225 Difference]: With dead ends: 116 [2022-07-19 10:25:29,379 INFO L226 Difference]: Without dead ends: 78 [2022-07-19 10:25:29,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=704, Invalid=4555, Unknown=5, NotChecked=286, Total=5550 [2022-07-19 10:25:29,381 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 86 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:29,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 107 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 595 Invalid, 0 Unknown, 396 Unchecked, 0.4s Time] [2022-07-19 10:25:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-19 10:25:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 37. [2022-07-19 10:25:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-07-19 10:25:29,386 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 29 [2022-07-19 10:25:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:29,386 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-07-19 10:25:29,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-07-19 10:25:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 10:25:29,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:29,387 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:29,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:25:29,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:29,604 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:29,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1722173266, now seen corresponding path program 5 times [2022-07-19 10:25:29,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:29,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687407738] [2022-07-19 10:25:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:29,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:29,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:29,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687407738] [2022-07-19 10:25:29,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687407738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:25:29,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472794535] [2022-07-19 10:25:29,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:25:29,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:29,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:25:29,696 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) [2022-07-19 10:25:29,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:25:29,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 10:25:29,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:25:29,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 10:25:29,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:25:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:29,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:25:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:29,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472794535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:25:29,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:25:29,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 10:25:29,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877145876] [2022-07-19 10:25:29,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:25:29,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 10:25:29,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 10:25:29,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:25:29,864 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:30,045 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2022-07-19 10:25:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 10:25:30,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-19 10:25:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:30,046 INFO L225 Difference]: With dead ends: 102 [2022-07-19 10:25:30,046 INFO L226 Difference]: Without dead ends: 62 [2022-07-19 10:25:30,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2022-07-19 10:25:30,047 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:30,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 38 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:25:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-19 10:25:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-07-19 10:25:30,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-07-19 10:25:30,053 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 32 [2022-07-19 10:25:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:30,053 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-07-19 10:25:30,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-07-19 10:25:30,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:25:30,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:30,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:30,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:25:30,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:30,273 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash 456261758, now seen corresponding path program 6 times [2022-07-19 10:25:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:30,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861783678] [2022-07-19 10:25:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:30,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:31,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861783678] [2022-07-19 10:25:31,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861783678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:25:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465019003] [2022-07-19 10:25:31,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:25:31,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:31,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:25:31,016 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) [2022-07-19 10:25:31,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:25:31,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 10:25:31,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:25:31,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-19 10:25:31,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:25:31,156 INFO L390 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 15 treesize of output 11 [2022-07-19 10:25:31,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:25:31,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-07-19 10:25:31,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-07-19 10:25:31,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:25:31,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2022-07-19 10:25:31,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:25:31,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 54 [2022-07-19 10:25:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2022-07-19 10:25:31,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:31,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2022-07-19 10:25:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:31,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:25:50,423 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_277 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_271 Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_271)))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_277 (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (<= (+ v_ArrVal_277 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_277)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* c_~N~0 5)) (not (<= v_ArrVal_271 0)))))) is different from false [2022-07-19 10:26:08,052 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_269 Int) (v_ArrVal_277 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_271 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_269) (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_271))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_269 0)) (<= (+ v_ArrVal_277 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_277)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* c_~N~0 5)) (not (<= v_ArrVal_271 0)) (not (<= v_ArrVal_277 (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ .cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))))))))) is different from false [2022-07-19 10:26:26,973 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-19 10:26:26,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 465502 treesize of output 453190 [2022-07-19 10:26:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 31 refuted. 1 times theorem prover too weak. 0 trivial. 12 not checked. [2022-07-19 10:26:51,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465019003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:26:51,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:26:51,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 19] total 54 [2022-07-19 10:26:51,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862774546] [2022-07-19 10:26:51,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:26:51,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-19 10:26:51,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:26:51,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-19 10:26:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2332, Unknown=32, NotChecked=202, Total=2862 [2022-07-19 10:26:51,650 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 54 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:27:31,657 WARN L233 SmtUtils]: Spent 12.13s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 10:29:01,557 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_277 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_277 (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (<= (+ v_ArrVal_277 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_277)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* c_~N~0 5))))) (forall ((v_ArrVal_277 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_271 Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_271)))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_277 (let ((.cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ .cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |ULTIMATE.start_main_~#sum~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (<= (+ v_ArrVal_277 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_277)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* c_~N~0 5)) (not (<= v_ArrVal_271 0))))))) is different from false [2022-07-19 10:29:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:29:40,958 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2022-07-19 10:29:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-19 10:29:40,958 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-19 10:29:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:29:40,959 INFO L225 Difference]: With dead ends: 119 [2022-07-19 10:29:40,959 INFO L226 Difference]: Without dead ends: 83 [2022-07-19 10:29:40,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 229.2s TimeCoverageRelationStatistics Valid=747, Invalid=5814, Unknown=93, NotChecked=486, Total=7140 [2022-07-19 10:29:40,961 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 634 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:29:40,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 105 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 484 Invalid, 0 Unknown, 634 Unchecked, 0.3s Time] [2022-07-19 10:29:40,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-19 10:29:40,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2022-07-19 10:29:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 68 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2022-07-19 10:29:40,970 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 35 [2022-07-19 10:29:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:29:40,970 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2022-07-19 10:29:40,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2022-07-19 10:29:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 10:29:40,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:29:40,971 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:29:40,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:29:41,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:29:41,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:29:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:29:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash 518824043, now seen corresponding path program 7 times [2022-07-19 10:29:41,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:29:41,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493114482] [2022-07-19 10:29:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:29:41,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:29:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:29:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:29:41,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:29:41,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493114482] [2022-07-19 10:29:41,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493114482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:29:41,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128682082] [2022-07-19 10:29:41,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:29:41,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:29:41,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:29:41,306 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) [2022-07-19 10:29:41,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:29:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:29:41,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 10:29:41,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:29:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:29:41,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:29:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:29:41,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128682082] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:29:41,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:29:41,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-19 10:29:41,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62509710] [2022-07-19 10:29:41,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:29:41,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 10:29:41,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:29:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 10:29:41,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:29:41,563 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:41,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:29:41,972 INFO L93 Difference]: Finished difference Result 172 states and 196 transitions. [2022-07-19 10:29:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 10:29:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-19 10:29:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:29:41,973 INFO L225 Difference]: With dead ends: 172 [2022-07-19 10:29:41,973 INFO L226 Difference]: Without dead ends: 118 [2022-07-19 10:29:41,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 10:29:41,974 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:29:41,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 41 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:29:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-19 10:29:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 89. [2022-07-19 10:29:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 88 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2022-07-19 10:29:41,987 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 38 [2022-07-19 10:29:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:29:41,987 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2022-07-19 10:29:41,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2022-07-19 10:29:41,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 10:29:41,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:29:41,988 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:29:42,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:29:42,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 10:29:42,207 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:29:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:29:42,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1950683591, now seen corresponding path program 8 times [2022-07-19 10:29:42,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:29:42,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286606397] [2022-07-19 10:29:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:29:42,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:29:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:29:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 19 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:29:42,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:29:42,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286606397] [2022-07-19 10:29:42,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286606397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:29:42,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534989703] [2022-07-19 10:29:42,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:29:42,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:29:42,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:29:42,363 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) [2022-07-19 10:29:42,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:29:42,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:29:42,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:29:42,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 10:29:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:29:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-19 10:29:42,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:29:42,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534989703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:29:42,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 10:29:42,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 16 [2022-07-19 10:29:42,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181252656] [2022-07-19 10:29:42,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:29:42,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:29:42,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:29:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:29:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:29:42,461 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:42,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:29:42,519 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-07-19 10:29:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:29:42,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 10:29:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:29:42,520 INFO L225 Difference]: With dead ends: 97 [2022-07-19 10:29:42,520 INFO L226 Difference]: Without dead ends: 87 [2022-07-19 10:29:42,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:29:42,521 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:29:42,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:29:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-19 10:29:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2022-07-19 10:29:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 79 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-07-19 10:29:42,539 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 41 [2022-07-19 10:29:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:29:42,539 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-07-19 10:29:42,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:29:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-07-19 10:29:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 10:29:42,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:29:42,542 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:29:42,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:29:42,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:29:42,747 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:29:42,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:29:42,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1270625221, now seen corresponding path program 9 times [2022-07-19 10:29:42,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:29:42,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551381370] [2022-07-19 10:29:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:29:42,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:29:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:29:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:29:43,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:29:43,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551381370] [2022-07-19 10:29:43,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551381370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:29:43,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951552258] [2022-07-19 10:29:43,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:29:43,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:29:43,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:29:43,859 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) [2022-07-19 10:29:43,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:29:43,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 10:29:43,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:29:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-19 10:29:43,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:29:43,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:29:43,979 INFO L390 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 15 treesize of output 11 [2022-07-19 10:29:44,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:29:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-07-19 10:29:44,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2022-07-19 10:29:44,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 66 [2022-07-19 10:29:44,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:29:44,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:44,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 74 [2022-07-19 10:29:45,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,146 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-19 10:29:45,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 85 [2022-07-19 10:29:45,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,437 INFO L356 Elim1Store]: treesize reduction 153, result has 0.6 percent of original size [2022-07-19 10:29:45,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 101 treesize of output 99 [2022-07-19 10:29:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:45,858 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-07-19 10:29:45,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 99 treesize of output 102 [2022-07-19 10:29:46,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:46,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:46,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:46,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:46,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:29:46,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:46,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:46,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:46,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:29:46,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:29:46,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:29:46,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 23 [2022-07-19 10:29:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:29:46,431 INFO L328 TraceCheckSpWp]: Computing backward predicates...