./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/verifythis/duplets.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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:56:40,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:56:40,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:56:40,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:56:40,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:56:40,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:56:40,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:56:40,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:56:40,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:56:40,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:56:40,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:56:40,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:56:40,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:56:40,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:56:40,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:56:40,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:56:40,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:56:40,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:56:40,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:56:40,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:56:40,856 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:56:40,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:56:40,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:56:40,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:56:40,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:56:40,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:56:40,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:56:40,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:56:40,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:56:40,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:56:40,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:56:40,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:56:40,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:56:40,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:56:40,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:56:40,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:56:40,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:56:40,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:56:40,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:56:40,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:56:40,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:56:40,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:56:40,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:56:40,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:56:40,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:56:40,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:56:40,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:56:40,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:56:40,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:56:40,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:56:40,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:56:40,896 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:56:40,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:56:40,897 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:56:40,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:56:40,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:56:40,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:56:40,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:56:40,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:56:40,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:56:40,898 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:56:40,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:56:40,898 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:56:40,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:56:40,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:56:40,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:56:40,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:56:40,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:56:40,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:56:40,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:56:40,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:56:40,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:56:40,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:56:40,900 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:56:40,900 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:56:40,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:56:40,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-07-13 15:56:41,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:56:41,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:56:41,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:56:41,125 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:56:41,125 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:56:41,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/duplets.c [2022-07-13 15:56:41,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca3fe335/15538ae603414ce586f0e71d6df2ddd4/FLAGee9e22f58 [2022-07-13 15:56:41,604 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:56:41,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/duplets.c [2022-07-13 15:56:41,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca3fe335/15538ae603414ce586f0e71d6df2ddd4/FLAGee9e22f58 [2022-07-13 15:56:41,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca3fe335/15538ae603414ce586f0e71d6df2ddd4 [2022-07-13 15:56:41,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:56:42,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:56:42,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:56:42,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:56:42,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:56:42,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:56:41" (1/1) ... [2022-07-13 15:56:42,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f7e67b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42, skipping insertion in model container [2022-07-13 15:56:42,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:56:41" (1/1) ... [2022-07-13 15:56:42,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:56:42,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:56:42,152 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/verifythis/duplets.c[485,498] [2022-07-13 15:56:42,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:56:42,200 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:56:42,213 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/verifythis/duplets.c[485,498] [2022-07-13 15:56:42,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:56:42,249 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:56:42,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42 WrapperNode [2022-07-13 15:56:42,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:56:42,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:56:42,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:56:42,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:56:42,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (1/1) ... [2022-07-13 15:56:42,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (1/1) ... [2022-07-13 15:56:42,283 INFO L137 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 120 [2022-07-13 15:56:42,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:56:42,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:56:42,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:56:42,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:56:42,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (1/1) ... [2022-07-13 15:56:42,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (1/1) ... [2022-07-13 15:56:42,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (1/1) ... [2022-07-13 15:56:42,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (1/1) ... [2022-07-13 15:56:42,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (1/1) ... [2022-07-13 15:56:42,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (1/1) ... [2022-07-13 15:56:42,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (1/1) ... [2022-07-13 15:56:42,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:56:42,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:56:42,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:56:42,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:56:42,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (1/1) ... [2022-07-13 15:56:42,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:56:42,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:56:42,335 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) [2022-07-13 15:56:42,339 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 [2022-07-13 15:56:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:56:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 15:56:42,358 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 15:56:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:56:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 15:56:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 15:56:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 15:56:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:56:42,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:56:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 15:56:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 15:56:42,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 15:56:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 15:56:42,423 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:56:42,424 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:56:42,570 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:56:42,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:56:42,579 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 15:56:42,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:56:42 BoogieIcfgContainer [2022-07-13 15:56:42,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:56:42,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:56:42,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:56:42,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:56:42,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:56:41" (1/3) ... [2022-07-13 15:56:42,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23283429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:56:42, skipping insertion in model container [2022-07-13 15:56:42,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:56:42" (2/3) ... [2022-07-13 15:56:42,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23283429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:56:42, skipping insertion in model container [2022-07-13 15:56:42,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:56:42" (3/3) ... [2022-07-13 15:56:42,590 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-07-13 15:56:42,599 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:56:42,599 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:56:42,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:56:42,642 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@314330f4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ace4e7c [2022-07-13 15:56:42,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:56:42,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 15:56:42,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 15:56:42,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:56:42,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:56:42,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:56:42,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:56:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1761765480, now seen corresponding path program 1 times [2022-07-13 15:56:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:56:42,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143617319] [2022-07-13 15:56:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:42,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:56:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:42,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:56:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:42,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:56:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:56:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:42,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:56:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:56:42,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:56:42,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143617319] [2022-07-13 15:56:42,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143617319] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:56:42,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:56:42,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:56:42,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650724252] [2022-07-13 15:56:42,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:56:42,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:56:42,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:56:42,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:56:42,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:56:42,865 INFO L87 Difference]: Start difference. First operand has 42 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 15:56:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:56:42,885 INFO L93 Difference]: Finished difference Result 81 states and 119 transitions. [2022-07-13 15:56:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:56:42,887 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-07-13 15:56:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:56:42,891 INFO L225 Difference]: With dead ends: 81 [2022-07-13 15:56:42,892 INFO L226 Difference]: Without dead ends: 38 [2022-07-13 15:56:42,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:56:42,898 INFO L413 NwaCegarLoop]: 53 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, 53 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 [2022-07-13 15:56:42,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:56:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-13 15:56:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-13 15:56:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 15:56:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-07-13 15:56:42,928 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 33 [2022-07-13 15:56:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:56:42,928 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-07-13 15:56:42,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 15:56:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-07-13 15:56:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 15:56:42,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:56:42,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:56:42,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:56:42,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:56:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:56:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1486889832, now seen corresponding path program 1 times [2022-07-13 15:56:42,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:56:42,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022200691] [2022-07-13 15:56:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:42,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:56:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:56:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:56:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:56:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:56:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 15:56:43,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:56:43,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022200691] [2022-07-13 15:56:43,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022200691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:56:43,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583533343] [2022-07-13 15:56:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:43,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:56:43,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:56:43,097 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) [2022-07-13 15:56:43,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:56:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 15:56:43,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:56:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 15:56:43,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:56:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 15:56:43,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583533343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:56:43,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:56:43,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-13 15:56:43,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180692429] [2022-07-13 15:56:43,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:56:43,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 15:56:43,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:56:43,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 15:56:43,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-13 15:56:43,395 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 15:56:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:56:43,556 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2022-07-13 15:56:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:56:43,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2022-07-13 15:56:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:56:43,563 INFO L225 Difference]: With dead ends: 86 [2022-07-13 15:56:43,563 INFO L226 Difference]: Without dead ends: 67 [2022-07-13 15:56:43,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-07-13 15:56:43,565 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 158 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:56:43,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 203 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:56:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-13 15:56:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-07-13 15:56:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 15:56:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-07-13 15:56:43,579 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 33 [2022-07-13 15:56:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:56:43,580 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-07-13 15:56:43,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 15:56:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-07-13 15:56:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 15:56:43,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:56:43,588 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:56:43,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 15:56:43,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:56:43,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:56:43,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:56:43,807 INFO L85 PathProgramCache]: Analyzing trace with hash -534242288, now seen corresponding path program 1 times [2022-07-13 15:56:43,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:56:43,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593928183] [2022-07-13 15:56:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:43,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:56:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:56:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:56:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:56:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:56:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:56:43,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:56:43,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593928183] [2022-07-13 15:56:43,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593928183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:56:43,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:56:43,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 15:56:43,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645214797] [2022-07-13 15:56:43,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:56:43,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:56:43,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:56:43,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:56:43,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:56:43,911 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 15:56:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:56:43,948 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-07-13 15:56:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:56:43,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-07-13 15:56:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:56:43,949 INFO L225 Difference]: With dead ends: 57 [2022-07-13 15:56:43,949 INFO L226 Difference]: Without dead ends: 55 [2022-07-13 15:56:43,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:56:43,951 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 22 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:56:43,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 241 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:56:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-13 15:56:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2022-07-13 15:56:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 15:56:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-07-13 15:56:43,957 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 34 [2022-07-13 15:56:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:56:43,957 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-07-13 15:56:43,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 15:56:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-07-13 15:56:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 15:56:43,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:56:43,959 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:56:43,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 15:56:43,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:56:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:56:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1697931955, now seen corresponding path program 1 times [2022-07-13 15:56:43,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:56:43,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017254916] [2022-07-13 15:56:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:43,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:56:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:56:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:56:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:56:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:56:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 15:56:44,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:56:44,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017254916] [2022-07-13 15:56:44,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017254916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:56:44,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:56:44,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 15:56:44,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970500334] [2022-07-13 15:56:44,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:56:44,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 15:56:44,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:56:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 15:56:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-13 15:56:44,140 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 15:56:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:56:44,417 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2022-07-13 15:56:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 15:56:44,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-07-13 15:56:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:56:44,420 INFO L225 Difference]: With dead ends: 92 [2022-07-13 15:56:44,420 INFO L226 Difference]: Without dead ends: 62 [2022-07-13 15:56:44,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:56:44,421 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 183 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:56:44,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 242 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:56:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-13 15:56:44,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-07-13 15:56:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 15:56:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-07-13 15:56:44,430 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 36 [2022-07-13 15:56:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:56:44,430 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-07-13 15:56:44,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 15:56:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-07-13 15:56:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 15:56:44,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:56:44,431 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:56:44,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 15:56:44,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:56:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:56:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1519460479, now seen corresponding path program 1 times [2022-07-13 15:56:44,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:56:44,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310905148] [2022-07-13 15:56:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:44,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:56:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:56:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:56:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:56:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:56:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:56:44,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:56:44,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310905148] [2022-07-13 15:56:44,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310905148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:56:44,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902093783] [2022-07-13 15:56:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:44,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:56:44,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:56:44,489 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) [2022-07-13 15:56:44,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:56:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:44,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 15:56:44,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:56:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:56:44,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:56:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:56:44,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902093783] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:56:44,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:56:44,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-13 15:56:44,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782523107] [2022-07-13 15:56:44,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:56:44,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:56:44,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:56:44,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:56:44,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:56:44,601 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 15:56:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:56:44,640 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2022-07-13 15:56:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:56:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-07-13 15:56:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:56:44,641 INFO L225 Difference]: With dead ends: 78 [2022-07-13 15:56:44,641 INFO L226 Difference]: Without dead ends: 59 [2022-07-13 15:56:44,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:56:44,642 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 28 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:56:44,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 168 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:56:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-13 15:56:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-07-13 15:56:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 15:56:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-13 15:56:44,651 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 39 [2022-07-13 15:56:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:56:44,651 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-13 15:56:44,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 15:56:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-13 15:56:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 15:56:44,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:56:44,652 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:56:44,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 15:56:44,888 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 [2022-07-13 15:56:44,888 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:56:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:56:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash 764415265, now seen corresponding path program 1 times [2022-07-13 15:56:44,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:56:44,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203767958] [2022-07-13 15:56:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:44,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:56:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:45,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:56:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:45,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:56:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:45,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:56:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:45,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:56:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:45,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 15:56:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:56:45,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:56:45,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203767958] [2022-07-13 15:56:45,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203767958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:56:45,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101123786] [2022-07-13 15:56:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:45,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:56:45,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:56:45,071 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) [2022-07-13 15:56:45,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:56:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:45,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 15:56:45,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:56:45,160 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 [2022-07-13 15:56:45,260 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-07-13 15:56:45,263 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 14 treesize of output 16 [2022-07-13 15:56:45,352 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 15 treesize of output 7 [2022-07-13 15:56:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:56:45,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:56:45,436 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:56:45,436 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-13 15:56:45,442 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:56:45,443 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 30 treesize of output 33 [2022-07-13 15:56:45,446 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 9 treesize of output 7 [2022-07-13 15:56:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:56:45,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101123786] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 15:56:45,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:56:45,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 10] total 24 [2022-07-13 15:56:45,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23093466] [2022-07-13 15:56:45,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:56:45,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 15:56:45,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:56:45,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 15:56:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-07-13 15:56:45,560 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:56:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:56:45,744 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2022-07-13 15:56:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 15:56:45,745 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-07-13 15:56:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:56:45,746 INFO L225 Difference]: With dead ends: 83 [2022-07-13 15:56:45,746 INFO L226 Difference]: Without dead ends: 81 [2022-07-13 15:56:45,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-07-13 15:56:45,747 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 38 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:56:45,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 306 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:56:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-13 15:56:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2022-07-13 15:56:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 47 states have internal predecessors, (54), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 15:56:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2022-07-13 15:56:45,758 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 41 [2022-07-13 15:56:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:56:45,758 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2022-07-13 15:56:45,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:56:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2022-07-13 15:56:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 15:56:45,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:56:45,759 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:56:45,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 15:56:45,977 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 [2022-07-13 15:56:45,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:56:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:56:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash 766262307, now seen corresponding path program 1 times [2022-07-13 15:56:45,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:56:45,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381053347] [2022-07-13 15:56:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:45,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:56:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:56:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:56:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:56:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:56:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 15:56:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:56:46,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:56:46,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381053347] [2022-07-13 15:56:46,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381053347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:56:46,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:56:46,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 15:56:46,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184510802] [2022-07-13 15:56:46,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:56:46,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 15:56:46,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:56:46,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 15:56:46,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:56:46,101 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:56:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:56:46,300 INFO L93 Difference]: Finished difference Result 93 states and 120 transitions. [2022-07-13 15:56:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 15:56:46,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-07-13 15:56:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:56:46,301 INFO L225 Difference]: With dead ends: 93 [2022-07-13 15:56:46,301 INFO L226 Difference]: Without dead ends: 79 [2022-07-13 15:56:46,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 15:56:46,302 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:56:46,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 187 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:56:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-13 15:56:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2022-07-13 15:56:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 48 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 15:56:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-07-13 15:56:46,312 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 41 [2022-07-13 15:56:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:56:46,312 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-07-13 15:56:46,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:56:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-07-13 15:56:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 15:56:46,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:56:46,313 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:56:46,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 15:56:46,314 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:56:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:56:46,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1347467836, now seen corresponding path program 2 times [2022-07-13 15:56:46,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:56:46,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559685783] [2022-07-13 15:56:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:56:46,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:56:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:56:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:56:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:56:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:56:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:56:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 15:56:46,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:56:46,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559685783] [2022-07-13 15:56:46,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559685783] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:56:46,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169354043] [2022-07-13 15:56:46,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:56:46,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:56:46,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:56:46,700 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) [2022-07-13 15:56:46,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:56:46,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:56:46,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:56:46,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-13 15:56:46,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:56:46,922 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-13 15:56:46,922 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-13 15:56:49,145 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-13 15:56:49,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 62 [2022-07-13 15:56:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 15:56:53,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:56:57,615 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 15:56:57,616 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 503 treesize of output 435 [2022-07-13 15:56:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 15:56:59,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169354043] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:56:59,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:56:59,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-07-13 15:56:59,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367340237] [2022-07-13 15:56:59,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:56:59,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-13 15:56:59,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:56:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-13 15:56:59,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1139, Unknown=5, NotChecked=0, Total=1260 [2022-07-13 15:56:59,094 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 15:57:07,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:07,907 INFO L93 Difference]: Finished difference Result 113 states and 144 transitions. [2022-07-13 15:57:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 15:57:07,908 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 42 [2022-07-13 15:57:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:07,908 INFO L225 Difference]: With dead ends: 113 [2022-07-13 15:57:07,908 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 15:57:07,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=237, Invalid=1920, Unknown=5, NotChecked=0, Total=2162 [2022-07-13 15:57:07,909 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:07,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 655 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 309 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-07-13 15:57:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 15:57:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2022-07-13 15:57:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 15:57:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-07-13 15:57:07,918 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 42 [2022-07-13 15:57:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:07,918 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-07-13 15:57:07,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 15:57:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-07-13 15:57:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 15:57:07,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:07,919 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:07,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:57:08,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:08,120 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:08,120 INFO L85 PathProgramCache]: Analyzing trace with hash 236785912, now seen corresponding path program 3 times [2022-07-13 15:57:08,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:08,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431632301] [2022-07-13 15:57:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:08,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:57:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:57:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:57:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:57:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:57:08,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:08,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431632301] [2022-07-13 15:57:08,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431632301] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:57:08,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534237285] [2022-07-13 15:57:08,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:57:08,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:08,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:57:08,166 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) [2022-07-13 15:57:08,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:57:08,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 15:57:08,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:57:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 15:57:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:57:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:57:08,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:57:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:57:08,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534237285] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:57:08,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:57:08,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-07-13 15:57:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114027571] [2022-07-13 15:57:08,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:57:08,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 15:57:08,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 15:57:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:57:08,292 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 15:57:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:08,386 INFO L93 Difference]: Finished difference Result 132 states and 172 transitions. [2022-07-13 15:57:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:57:08,387 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2022-07-13 15:57:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:08,388 INFO L225 Difference]: With dead ends: 132 [2022-07-13 15:57:08,388 INFO L226 Difference]: Without dead ends: 97 [2022-07-13 15:57:08,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-13 15:57:08,391 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 72 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:08,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 255 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:57:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-13 15:57:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2022-07-13 15:57:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 57 states have internal predecessors, (67), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 15:57:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-07-13 15:57:08,404 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 45 [2022-07-13 15:57:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:08,404 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-07-13 15:57:08,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 15:57:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-07-13 15:57:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 15:57:08,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:08,408 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:08,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 15:57:08,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:08,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:08,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:08,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1486891216, now seen corresponding path program 1 times [2022-07-13 15:57:08,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:08,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877742055] [2022-07-13 15:57:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:08,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:57:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:57:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:57:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:57:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 15:57:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 15:57:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 15:57:08,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:08,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877742055] [2022-07-13 15:57:08,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877742055] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:57:08,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:57:08,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 15:57:08,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494589887] [2022-07-13 15:57:08,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:57:08,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 15:57:08,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 15:57:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:57:08,691 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 15:57:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:08,807 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-07-13 15:57:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 15:57:08,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-07-13 15:57:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:08,808 INFO L225 Difference]: With dead ends: 88 [2022-07-13 15:57:08,808 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 15:57:08,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-13 15:57:08,809 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 44 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:08,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 222 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:57:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 15:57:08,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-07-13 15:57:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 63 states have internal predecessors, (73), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-13 15:57:08,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2022-07-13 15:57:08,824 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 48 [2022-07-13 15:57:08,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:08,824 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2022-07-13 15:57:08,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 15:57:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2022-07-13 15:57:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 15:57:08,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:08,825 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:08,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 15:57:08,825 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:08,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:08,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1485044174, now seen corresponding path program 1 times [2022-07-13 15:57:08,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:08,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117693006] [2022-07-13 15:57:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:08,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:57:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:57:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:57:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:57:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 15:57:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 15:57:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 15:57:08,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:08,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117693006] [2022-07-13 15:57:08,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117693006] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:57:08,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:57:08,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 15:57:08,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988676698] [2022-07-13 15:57:08,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:57:08,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:57:08,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:08,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:57:08,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:57:08,897 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 15:57:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:08,961 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2022-07-13 15:57:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:57:08,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-07-13 15:57:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:08,962 INFO L225 Difference]: With dead ends: 99 [2022-07-13 15:57:08,962 INFO L226 Difference]: Without dead ends: 88 [2022-07-13 15:57:08,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:57:08,963 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 23 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:08,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 144 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:57:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-13 15:57:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-07-13 15:57:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-13 15:57:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2022-07-13 15:57:08,973 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 48 [2022-07-13 15:57:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:08,973 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2022-07-13 15:57:08,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 15:57:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2022-07-13 15:57:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 15:57:08,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:08,974 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:08,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 15:57:08,975 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2047136682, now seen corresponding path program 1 times [2022-07-13 15:57:08,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:08,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152851619] [2022-07-13 15:57:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:08,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:09,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:57:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:09,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:57:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:09,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:57:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:57:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:09,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 15:57:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 15:57:09,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152851619] [2022-07-13 15:57:09,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152851619] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:57:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731485758] [2022-07-13 15:57:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:09,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:09,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:57:09,109 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) [2022-07-13 15:57:09,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 15:57:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:09,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 15:57:09,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:57:09,179 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 [2022-07-13 15:57:09,366 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-07-13 15:57:09,380 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 16 treesize of output 18 [2022-07-13 15:57:09,410 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 17 treesize of output 9 [2022-07-13 15:57:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:57:09,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:57:09,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:09,470 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-13 15:57:09,476 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:09,476 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 30 treesize of output 33 [2022-07-13 15:57:09,479 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 9 treesize of output 7 [2022-07-13 15:57:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 15:57:09,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731485758] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:57:09,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:57:09,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-07-13 15:57:09,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378055984] [2022-07-13 15:57:09,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:57:09,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 15:57:09,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:09,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 15:57:09,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-07-13 15:57:09,658 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-13 15:57:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:10,214 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2022-07-13 15:57:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 15:57:10,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2022-07-13 15:57:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:10,215 INFO L225 Difference]: With dead ends: 115 [2022-07-13 15:57:10,215 INFO L226 Difference]: Without dead ends: 113 [2022-07-13 15:57:10,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 15:57:10,216 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 153 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:10,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 432 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:57:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-13 15:57:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2022-07-13 15:57:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.2) internal successors, (78), 68 states have internal predecessors, (78), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-13 15:57:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-07-13 15:57:10,226 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 50 [2022-07-13 15:57:10,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:10,226 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-07-13 15:57:10,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-13 15:57:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2022-07-13 15:57:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 15:57:10,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:10,227 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:10,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 15:57:10,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:10,444 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2045289640, now seen corresponding path program 1 times [2022-07-13 15:57:10,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:10,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395032287] [2022-07-13 15:57:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:10,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:10,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:57:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:10,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:57:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:10,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:57:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:10,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:57:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:10,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 15:57:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-13 15:57:10,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:10,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395032287] [2022-07-13 15:57:10,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395032287] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:57:10,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380514615] [2022-07-13 15:57:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:10,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:10,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:57:10,545 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) [2022-07-13 15:57:10,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 15:57:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:10,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 15:57:10,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:57:10,617 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 [2022-07-13 15:57:10,718 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-07-13 15:57:10,721 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 14 treesize of output 16 [2022-07-13 15:57:10,780 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 15 treesize of output 7 [2022-07-13 15:57:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-13 15:57:10,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:57:10,802 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:10,802 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-13 15:57:10,808 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:10,808 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 30 treesize of output 33 [2022-07-13 15:57:10,810 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 9 treesize of output 7 [2022-07-13 15:57:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-13 15:57:10,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380514615] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 15:57:10,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:57:10,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 17 [2022-07-13 15:57:10,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43567793] [2022-07-13 15:57:10,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:57:10,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:57:10,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:57:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:57:10,907 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:57:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:10,980 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2022-07-13 15:57:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:57:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-07-13 15:57:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:10,981 INFO L225 Difference]: With dead ends: 110 [2022-07-13 15:57:10,981 INFO L226 Difference]: Without dead ends: 91 [2022-07-13 15:57:10,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-07-13 15:57:10,982 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 43 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:10,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 130 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:57:10,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-13 15:57:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-07-13 15:57:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-13 15:57:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-07-13 15:57:10,992 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 50 [2022-07-13 15:57:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:10,992 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-07-13 15:57:10,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:57:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-07-13 15:57:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 15:57:10,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:10,993 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:11,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 15:57:11,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:11,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1688735023, now seen corresponding path program 4 times [2022-07-13 15:57:11,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:11,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106912830] [2022-07-13 15:57:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:12,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:57:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:12,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:57:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:12,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:57:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:12,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:57:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 15:57:12,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106912830] [2022-07-13 15:57:12,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106912830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:57:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337412395] [2022-07-13 15:57:12,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:57:12,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:12,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:57:12,677 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) [2022-07-13 15:57:12,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 15:57:12,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:57:12,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:57:12,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-13 15:57:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:57:12,742 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 7 treesize of output 6 [2022-07-13 15:57:14,780 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_7| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_7|))) is different from true [2022-07-13 15:57:20,901 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_8| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_8|))) is different from true [2022-07-13 15:57:23,006 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_9| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_9|))) is different from true [2022-07-13 15:57:23,058 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-07-13 15:57:36,123 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 87 treesize of output 73 [2022-07-13 15:57:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 9 not checked. [2022-07-13 15:57:36,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:57:36,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337412395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:57:36,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:57:36,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24] total 39 [2022-07-13 15:57:36,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394338630] [2022-07-13 15:57:36,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:57:36,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 15:57:36,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:36,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 15:57:36,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2171, Unknown=7, NotChecked=294, Total=2756 [2022-07-13 15:57:36,989 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 35 states have internal predecessors, (55), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-13 15:57:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:56,432 INFO L93 Difference]: Finished difference Result 162 states and 195 transitions. [2022-07-13 15:57:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 15:57:56,433 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 35 states have internal predecessors, (55), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 51 [2022-07-13 15:57:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:56,434 INFO L225 Difference]: With dead ends: 162 [2022-07-13 15:57:56,434 INFO L226 Difference]: Without dead ends: 109 [2022-07-13 15:57:56,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=395, Invalid=2911, Unknown=12, NotChecked=342, Total=3660 [2022-07-13 15:57:56,435 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:56,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 448 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 333 Unchecked, 0.1s Time] [2022-07-13 15:57:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-13 15:57:56,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-07-13 15:57:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 86 states have internal predecessors, (99), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-13 15:57:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2022-07-13 15:57:56,449 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 51 [2022-07-13 15:57:56,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:57:56,449 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2022-07-13 15:57:56,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 35 states have internal predecessors, (55), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-13 15:57:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2022-07-13 15:57:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 15:57:56,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:57:56,450 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:57:56,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 15:57:56,669 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,SelfDestructingSolverStorable13 [2022-07-13 15:57:56,669 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:57:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:57:56,670 INFO L85 PathProgramCache]: Analyzing trace with hash 80194579, now seen corresponding path program 1 times [2022-07-13 15:57:56,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:57:56,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522163436] [2022-07-13 15:57:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:56,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:57:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:56,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:57:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:56,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:57:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:56,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:57:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:56,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:57:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:56,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 15:57:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 15:57:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:56,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 15:57:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 15:57:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:57:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522163436] [2022-07-13 15:57:56,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522163436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:57:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857953128] [2022-07-13 15:57:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:57:56,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:57:56,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:57:56,844 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) [2022-07-13 15:57:56,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 15:57:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:57:56,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 15:57:56,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:57:56,965 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 [2022-07-13 15:57:57,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:57:57,037 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-07-13 15:57:57,053 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 20 treesize of output 20 [2022-07-13 15:57:57,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 15:57:57,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 15:57:57,259 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 15:57:57,259 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 29 treesize of output 17 [2022-07-13 15:57:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 15:57:57,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:57:57,345 INFO L356 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-07-13 15:57:57,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 87 [2022-07-13 15:57:57,350 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:57,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 59 [2022-07-13 15:57:57,374 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:57,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 211 [2022-07-13 15:57:57,391 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:57,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 167 [2022-07-13 15:57:57,410 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:57,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 15:57:57,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-07-13 15:57:58,101 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:58,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2022-07-13 15:57:58,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 15:57:58,129 INFO L356 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-07-13 15:57:58,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 68 treesize of output 1 [2022-07-13 15:57:58,166 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-07-13 15:57:58,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 43 treesize of output 41 [2022-07-13 15:57:58,228 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:58,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2022-07-13 15:57:58,274 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-07-13 15:57:58,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 61 treesize of output 59 [2022-07-13 15:57:58,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 15:57:58,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 1 [2022-07-13 15:57:58,367 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:58,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2022-07-13 15:57:58,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 15:57:58,405 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-13 15:57:58,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 63 treesize of output 63 [2022-07-13 15:57:58,792 INFO L356 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-07-13 15:57:58,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 412 treesize of output 1 [2022-07-13 15:57:58,987 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:58,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 82 [2022-07-13 15:57:58,993 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:58,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 74 [2022-07-13 15:57:59,110 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 6 treesize of output 4 [2022-07-13 15:57:59,124 INFO L356 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-07-13 15:57:59,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 63 [2022-07-13 15:57:59,133 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-13 15:57:59,155 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 6 treesize of output 4 [2022-07-13 15:57:59,167 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 8 treesize of output 6 [2022-07-13 15:57:59,211 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:59,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2022-07-13 15:57:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:57:59,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:57:59,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:57:59,278 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 15:57:59,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 1 [2022-07-13 15:57:59,286 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-13 15:57:59,291 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-13 15:57:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:57:59,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:57:59,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2022-07-13 15:57:59,342 INFO L356 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-07-13 15:57:59,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 82 [2022-07-13 15:57:59,409 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:57:59,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 110 [2022-07-13 15:57:59,553 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 6 treesize of output 4 [2022-07-13 15:57:59,572 INFO L356 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-07-13 15:57:59,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 53 [2022-07-13 15:57:59,605 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 6 treesize of output 4 [2022-07-13 15:57:59,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:57:59,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:57:59,613 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 6 treesize of output 4 [2022-07-13 15:57:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 15:57:59,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857953128] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 15:57:59,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:57:59,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 9] total 20 [2022-07-13 15:57:59,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470686955] [2022-07-13 15:57:59,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:57:59,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 15:57:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:57:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 15:57:59,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-13 15:57:59,781 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 15:57:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:57:59,984 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-07-13 15:57:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:57:59,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-07-13 15:57:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:57:59,985 INFO L225 Difference]: With dead ends: 133 [2022-07-13 15:57:59,985 INFO L226 Difference]: Without dead ends: 131 [2022-07-13 15:57:59,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-07-13 15:57:59,986 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 43 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:57:59,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 217 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:57:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-13 15:58:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-07-13 15:58:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 98 states have (on average 1.163265306122449) internal successors, (114), 102 states have internal predecessors, (114), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-13 15:58:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2022-07-13 15:58:00,004 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 54 [2022-07-13 15:58:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:58:00,004 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2022-07-13 15:58:00,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 15:58:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2022-07-13 15:58:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 15:58:00,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:00,004 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:58:00,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 15:58:00,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 15:58:00,215 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:00,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2139469497, now seen corresponding path program 1 times [2022-07-13 15:58:00,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:00,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553369795] [2022-07-13 15:58:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:00,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:00,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:58:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:00,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:58:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:00,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:58:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:00,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:58:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:00,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 15:58:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:00,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-13 15:58:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:00,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 15:58:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 15:58:00,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553369795] [2022-07-13 15:58:00,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553369795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:58:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082499264] [2022-07-13 15:58:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:00,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:00,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:00,448 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) [2022-07-13 15:58:00,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 15:58:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:00,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 15:58:00,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:58:00,547 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 [2022-07-13 15:58:00,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:58:00,726 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-07-13 15:58:00,729 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 20 treesize of output 20 [2022-07-13 15:58:00,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 15:58:00,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 15:58:00,913 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 15:58:00,913 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 29 treesize of output 17 [2022-07-13 15:58:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 15:58:00,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:58:00,973 INFO L356 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-07-13 15:58:00,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 87 [2022-07-13 15:58:00,977 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:00,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 59 [2022-07-13 15:58:00,996 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:00,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 211 [2022-07-13 15:58:01,011 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:01,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 167 [2022-07-13 15:58:01,334 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:01,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 15:58:01,345 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 6 treesize of output 4 [2022-07-13 15:58:01,450 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:01,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 15:58:01,468 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:01,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 6 [2022-07-13 15:58:01,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 15:58:01,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-07-13 15:58:01,520 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:01,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 15:58:01,529 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 6 treesize of output 4 [2022-07-13 15:58:01,600 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:01,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 15:58:01,958 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-07-13 15:58:01,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 1 [2022-07-13 15:58:02,003 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:02,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 15:58:02,011 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-13 15:58:02,042 INFO L356 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-07-13 15:58:02,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2022-07-13 15:58:02,055 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:02,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 6 [2022-07-13 15:58:02,077 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:02,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-13 15:58:02,291 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 24 treesize of output 22 [2022-07-13 15:58:02,293 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 6 treesize of output 4 [2022-07-13 15:58:02,297 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 6 treesize of output 4 [2022-07-13 15:58:02,301 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 6 treesize of output 4 [2022-07-13 15:58:02,309 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-13 15:58:02,330 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 24 treesize of output 22 [2022-07-13 15:58:02,335 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:02,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-07-13 15:58:02,354 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 6 treesize of output 4 [2022-07-13 15:58:02,367 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 8 treesize of output 6 [2022-07-13 15:58:02,377 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 24 treesize of output 22 [2022-07-13 15:58:02,393 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:02,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-13 15:58:02,447 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 8 treesize of output 6 [2022-07-13 15:58:02,454 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 11 treesize of output 9 [2022-07-13 15:58:02,481 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 6 treesize of output 4 [2022-07-13 15:58:02,514 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 6 treesize of output 4 [2022-07-13 15:58:02,523 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-13 15:58:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:58:02,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:58:02,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 15:58:02,535 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-13 15:58:02,554 INFO L356 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-07-13 15:58:02,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 59 [2022-07-13 15:58:02,588 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:02,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 127 [2022-07-13 15:58:02,774 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 6 treesize of output 4 [2022-07-13 15:58:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 15:58:03,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082499264] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:58:03,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:58:03,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 23 [2022-07-13 15:58:03,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220883015] [2022-07-13 15:58:03,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:58:03,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 15:58:03,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:58:03,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 15:58:03,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-07-13 15:58:03,029 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 23 states, 20 states have (on average 2.8) internal successors, (56), 22 states have internal predecessors, (56), 6 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-13 15:58:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:58:04,190 INFO L93 Difference]: Finished difference Result 191 states and 230 transitions. [2022-07-13 15:58:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 15:58:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.8) internal successors, (56), 22 states have internal predecessors, (56), 6 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 57 [2022-07-13 15:58:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:58:04,191 INFO L225 Difference]: With dead ends: 191 [2022-07-13 15:58:04,191 INFO L226 Difference]: Without dead ends: 189 [2022-07-13 15:58:04,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 15:58:04,192 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 139 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:58:04,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 596 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 921 Invalid, 0 Unknown, 99 Unchecked, 0.5s Time] [2022-07-13 15:58:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-13 15:58:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 143. [2022-07-13 15:58:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 113 states have internal predecessors, (125), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-13 15:58:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2022-07-13 15:58:04,212 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 57 [2022-07-13 15:58:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:58:04,213 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2022-07-13 15:58:04,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.8) internal successors, (56), 22 states have internal predecessors, (56), 6 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-13 15:58:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2022-07-13 15:58:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 15:58:04,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:04,213 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:58:04,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 15:58:04,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 15:58:04,421 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -692170403, now seen corresponding path program 1 times [2022-07-13 15:58:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85220212] [2022-07-13 15:58:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:04,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:58:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:04,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:58:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:04,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:58:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:04,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:58:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:04,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 15:58:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:04,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 15:58:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 15:58:04,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:04,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85220212] [2022-07-13 15:58:04,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85220212] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:58:04,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961169134] [2022-07-13 15:58:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:04,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:04,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:04,497 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:58:04,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 15:58:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:04,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 15:58:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:58:04,679 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-13 15:58:04,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-07-13 15:58:04,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 15:58:04,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 15:58:04,776 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 9 treesize of output 7 [2022-07-13 15:58:04,817 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-13 15:58:04,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 20 [2022-07-13 15:58:04,820 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 15 treesize of output 11 [2022-07-13 15:58:04,897 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 15 treesize of output 7 [2022-07-13 15:58:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 15:58:04,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:58:04,929 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:58:04,929 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 98 treesize of output 100 [2022-07-13 15:58:04,932 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 112 treesize of output 108 [2022-07-13 15:58:04,937 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 53 treesize of output 51 [2022-07-13 15:58:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 15:58:05,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961169134] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:58:05,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:58:05,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-07-13 15:58:05,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674984594] [2022-07-13 15:58:05,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:58:05,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 15:58:05,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:58:05,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 15:58:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-07-13 15:58:05,110 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 15:58:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:58:05,356 INFO L93 Difference]: Finished difference Result 177 states and 204 transitions. [2022-07-13 15:58:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 15:58:05,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 57 [2022-07-13 15:58:05,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:58:05,358 INFO L225 Difference]: With dead ends: 177 [2022-07-13 15:58:05,358 INFO L226 Difference]: Without dead ends: 159 [2022-07-13 15:58:05,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2022-07-13 15:58:05,358 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:58:05,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 334 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 199 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-07-13 15:58:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-13 15:58:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2022-07-13 15:58:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 117 states have internal predecessors, (127), 21 states have call successors, (21), 14 states have call predecessors, (21), 14 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-13 15:58:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2022-07-13 15:58:05,379 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 57 [2022-07-13 15:58:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:58:05,379 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2022-07-13 15:58:05,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 15:58:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2022-07-13 15:58:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 15:58:05,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:58:05,380 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:58:05,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 15:58:05,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 15:58:05,596 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:58:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:58:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash 229495732, now seen corresponding path program 1 times [2022-07-13 15:58:05,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:58:05,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797810839] [2022-07-13 15:58:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:05,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:58:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:05,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:58:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:05,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:58:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:05,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:58:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:05,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:58:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:05,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 15:58:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:05,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 15:58:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:05,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 15:58:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:05,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-13 15:58:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 15:58:05,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:58:05,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797810839] [2022-07-13 15:58:05,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797810839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:58:05,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775791258] [2022-07-13 15:58:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:58:05,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:58:05,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:58:05,883 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:58:05,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 15:58:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:58:05,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-13 15:58:05,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:58:05,963 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 7 treesize of output 6 [2022-07-13 15:58:08,009 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_10| Int)) (and (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_10|)) (< |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_10| |c_#StackHeapBarrier|))) is different from true [2022-07-13 15:58:10,048 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_11| Int)) (and (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_11|)) (< |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_11| |c_#StackHeapBarrier|))) is different from true [2022-07-13 15:58:16,148 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_12| Int)) (and (< |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_12| |c_#StackHeapBarrier|) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_12|)))) is different from true [2022-07-13 15:58:16,192 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-07-13 15:58:18,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 15:58:20,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:58:20,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:58:20,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:58:20,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 55 [2022-07-13 15:58:20,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:58:20,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:58:20,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2022-07-13 15:58:20,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 15:58:20,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 15:59:01,951 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 97 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 15:59:31,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:59:31,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:59:31,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:59:31,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:59:31,303 INFO L356 Elim1Store]: treesize reduction 16, result has 82.0 percent of original size [2022-07-13 15:59:31,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 99 treesize of output 151 [2022-07-13 15:59:31,401 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 32 treesize of output 28 [2022-07-13 15:59:31,536 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 32 treesize of output 28 [2022-07-13 15:59:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 17 refuted. 1 times theorem prover too weak. 4 trivial. 12 not checked. [2022-07-13 15:59:32,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:59:33,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 15:59:33,203 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 6 treesize of output 4 [2022-07-13 15:59:33,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775791258] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:59:33,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:59:33,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 39 [2022-07-13 15:59:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767085583] [2022-07-13 15:59:33,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:59:33,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 15:59:33,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:59:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 15:59:33,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1848, Unknown=33, NotChecked=270, Total=2352 [2022-07-13 15:59:33,449 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand has 39 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 34 states have internal predecessors, (62), 10 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) [2022-07-13 15:59:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:59:54,403 INFO L93 Difference]: Finished difference Result 184 states and 203 transitions. [2022-07-13 15:59:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 15:59:54,404 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 34 states have internal predecessors, (62), 10 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) Word has length 60 [2022-07-13 15:59:54,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:59:54,405 INFO L225 Difference]: With dead ends: 184 [2022-07-13 15:59:54,405 INFO L226 Difference]: Without dead ends: 152 [2022-07-13 15:59:54,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 105.7s TimeCoverageRelationStatistics Valid=323, Invalid=3075, Unknown=36, NotChecked=348, Total=3782 [2022-07-13 15:59:54,406 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:59:54,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 442 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 427 Unchecked, 0.1s Time] [2022-07-13 15:59:54,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-13 15:59:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-07-13 15:59:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 120 states have internal predecessors, (129), 21 states have call successors, (21), 15 states have call predecessors, (21), 15 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-13 15:59:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2022-07-13 15:59:54,426 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 60 [2022-07-13 15:59:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:59:54,426 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2022-07-13 15:59:54,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 34 states have internal predecessors, (62), 10 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) [2022-07-13 15:59:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2022-07-13 15:59:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 15:59:54,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:59:54,427 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:59:54,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 15:59:54,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 15:59:54,636 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:59:54,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:59:54,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1828370920, now seen corresponding path program 1 times [2022-07-13 15:59:54,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:59:54,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442063829] [2022-07-13 15:59:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:54,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:59:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:58,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:59:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:58,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:59:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:58,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 15:59:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:58,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:59:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:58,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 15:59:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:58,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-13 15:59:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:58,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 15:59:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:58,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 15:59:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 15:59:58,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:59:58,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442063829] [2022-07-13 15:59:58,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442063829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:59:58,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206416120] [2022-07-13 15:59:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:59:58,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:59:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:59:58,721 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:59:58,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 15:59:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:59:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-13 15:59:58,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:59:58,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 15:59:59,168 INFO L356 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2022-07-13 15:59:59,169 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 1 case distinctions, treesize of input 22 treesize of output 31 [2022-07-13 15:59:59,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:59:59,235 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-13 15:59:59,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 18 [2022-07-13 15:59:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:59:59,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:59:59,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 37 [2022-07-13 15:59:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:59:59,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 34 [2022-07-13 15:59:59,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 15:59:59,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 16:00:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 16:00:38,754 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-07-13 16:00:38,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-07-13 16:00:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 16:00:38,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:00:39,533 INFO L356 Elim1Store]: treesize reduction 423, result has 39.3 percent of original size [2022-07-13 16:00:39,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 1316 treesize of output 1333 [2022-07-13 16:00:39,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 16:00:39,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 16:00:39,624 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 16:00:39,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 652 treesize of output 660 [2022-07-13 16:00:40,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 16:00:40,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 31 [2022-07-13 16:00:41,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 16:00:41,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 16:00:41,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 16:00:41,502 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 16:00:41,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 459 treesize of output 389 [2022-07-13 16:00:41,999 INFO L356 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2022-07-13 16:00:41,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 62 [2022-07-13 16:00:42,048 INFO L356 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-07-13 16:00:42,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 75 [2022-07-13 16:00:42,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206416120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:00:42,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:00:42,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 32 [2022-07-13 16:00:42,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060726735] [2022-07-13 16:00:42,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:00:42,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 16:00:42,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:00:42,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 16:00:42,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1275, Unknown=2, NotChecked=0, Total=1406 [2022-07-13 16:00:42,228 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 7 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-13 16:00:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:00:47,224 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2022-07-13 16:00:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 16:00:47,224 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 7 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 63 [2022-07-13 16:00:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:00:47,224 INFO L225 Difference]: With dead ends: 175 [2022-07-13 16:00:47,224 INFO L226 Difference]: Without dead ends: 121 [2022-07-13 16:00:47,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 93 SyntacticMatches, 13 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=347, Invalid=2621, Unknown=2, NotChecked=0, Total=2970 [2022-07-13 16:00:47,225 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 102 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 16:00:47,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 390 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 803 Invalid, 0 Unknown, 128 Unchecked, 0.9s Time] [2022-07-13 16:00:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-13 16:00:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-13 16:00:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 93 states have (on average 1.1290322580645162) internal successors, (105), 96 states have internal predecessors, (105), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-13 16:00:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2022-07-13 16:00:47,254 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 63 [2022-07-13 16:00:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:00:47,255 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2022-07-13 16:00:47,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 7 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-13 16:00:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2022-07-13 16:00:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 16:00:47,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:00:47,257 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:00:47,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 16:00:47,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:00:47,468 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:00:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:00:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1469994072, now seen corresponding path program 5 times [2022-07-13 16:00:47,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:00:47,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796985391] [2022-07-13 16:00:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:00:47,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:00:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:00:49,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 16:00:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:00:49,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 16:00:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:00:49,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 16:00:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:00:49,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 16:00:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:00:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 33 proven. 43 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 16:00:49,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:00:49,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796985391] [2022-07-13 16:00:49,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796985391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:00:49,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015426969] [2022-07-13 16:00:49,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 16:00:49,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:00:49,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:00:49,236 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:00:49,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 16:00:49,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-13 16:00:49,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:00:49,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-13 16:00:49,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:00:49,326 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 7 treesize of output 6 [2022-07-13 16:00:51,336 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_32| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_32|))) is different from true [2022-07-13 16:00:53,349 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_33| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_33|))) is different from true [2022-07-13 16:00:55,368 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_34| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_34|))) is different from true [2022-07-13 16:00:55,380 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-07-13 16:00:56,032 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_mkdup_~x~0#1| Int) (|ULTIMATE.start_mkdup_~i~0#1| Int) (|ULTIMATE.start_mkdup_~a#1.offset| Int) (|ULTIMATE.start_mkdup_~j~0#1| Int)) (= (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (store (store ((as const (Array Int Int)) 0) (+ |ULTIMATE.start_mkdup_~a#1.offset| (* |ULTIMATE.start_mkdup_~i~0#1| 4)) |ULTIMATE.start_mkdup_~x~0#1|) (+ |ULTIMATE.start_mkdup_~a#1.offset| (* |ULTIMATE.start_mkdup_~j~0#1| 4)) |ULTIMATE.start_mkdup_~x~0#1|))) is different from true [2022-07-13 16:00:56,686 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_mkdup_~x~0#1| Int) (|ULTIMATE.start_mkdup_~i~0#1| Int) (|ULTIMATE.start_mkdup_~a#1.offset| Int) (|ULTIMATE.start_mkdup_~j~0#1| Int)) (= (store (store ((as const (Array Int Int)) 0) (+ |ULTIMATE.start_mkdup_~a#1.offset| (* |ULTIMATE.start_mkdup_~i~0#1| 4)) |ULTIMATE.start_mkdup_~x~0#1|) (+ |ULTIMATE.start_mkdup_~a#1.offset| (* |ULTIMATE.start_mkdup_~j~0#1| 4)) |ULTIMATE.start_mkdup_~x~0#1|) (select |c_#memory_int| |c_ULTIMATE.start_finddup_~a#1.base|))) is different from true [2022-07-13 16:01:10,262 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 106 treesize of output 88 [2022-07-13 16:01:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 35 not checked. [2022-07-13 16:01:10,401 INFO L328 TraceCheckSpWp]: Computing backward predicates...