./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 646417a8dd8807492175439f0c109786ec3887ae 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:43:29,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:43:29,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:43:29,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:43:29,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:43:29,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:43:29,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:43:29,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:43:29,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:43:29,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:43:29,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:43:29,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:43:29,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:43:29,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:43:29,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:43:29,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:43:29,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:43:29,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:43:29,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:43:29,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:43:29,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:43:29,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:43:29,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:43:29,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:43:29,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:43:29,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:43:29,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:43:29,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:43:30,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:43:30,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:43:30,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:43:30,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:43:30,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:43:30,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:43:30,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:43:30,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:43:30,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:43:30,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:43:30,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:43:30,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:43:30,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:43:30,007 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:43:30,033 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:43:30,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:43:30,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:43:30,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:43:30,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:43:30,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:43:30,034 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:43:30,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:43:30,035 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:43:30,035 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:43:30,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:43:30,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:43:30,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:43:30,036 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:43:30,036 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:43:30,036 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:43:30,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:43:30,036 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:43:30,036 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:43:30,037 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:43:30,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:43:30,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:43:30,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:43:30,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:43:30,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:43:30,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:43:30,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:43:30,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:43:30,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:43:30,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 646417a8dd8807492175439f0c109786ec3887ae [2021-08-27 04:43:30,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:43:30,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:43:30,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:43:30,289 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:43:30,290 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:43:30,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-08-27 04:43:30,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/287da5e70/2f33e122ef174bfdb2c5292e2007b4bc/FLAGbfa6bb7e0 [2021-08-27 04:43:30,767 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:43:30,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-08-27 04:43:30,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/287da5e70/2f33e122ef174bfdb2c5292e2007b4bc/FLAGbfa6bb7e0 [2021-08-27 04:43:30,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/287da5e70/2f33e122ef174bfdb2c5292e2007b4bc [2021-08-27 04:43:30,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:43:30,786 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:43:30,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:43:30,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:43:30,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:43:30,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:43:30" (1/1) ... [2021-08-27 04:43:30,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aeb914b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:30, skipping insertion in model container [2021-08-27 04:43:30,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:43:30" (1/1) ... [2021-08-27 04:43:30,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:43:30,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:43:31,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:43:31,029 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:43:31,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:43:31,093 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:43:31,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:31 WrapperNode [2021-08-27 04:43:31,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:43:31,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:43:31,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:43:31,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:43:31,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:31" (1/1) ... [2021-08-27 04:43:31,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:31" (1/1) ... [2021-08-27 04:43:31,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:31" (1/1) ... [2021-08-27 04:43:31,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:31" (1/1) ... [2021-08-27 04:43:31,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:31" (1/1) ... [2021-08-27 04:43:31,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:31" (1/1) ... [2021-08-27 04:43:31,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:31" (1/1) ... [2021-08-27 04:43:31,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:43:31,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:43:31,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:43:31,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:43:31,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:31" (1/1) ... [2021-08-27 04:43:31,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:43:31,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:31,197 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) [2021-08-27 04:43:31,234 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 [2021-08-27 04:43:31,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:43:31,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:43:31,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:43:31,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:43:31,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:43:31,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:43:31,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:43:31,255 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrspn [2021-08-27 04:43:31,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:43:31,255 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:43:31,255 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:43:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:43:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:43:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:43:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:43:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:43:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:43:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:43:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:43:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:43:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:43:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:43:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:43:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:43:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:43:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:43:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:43:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:43:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:43:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:43:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:43:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:43:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:43:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:43:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:43:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:43:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:43:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:43:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:43:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:43:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:43:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:43:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:43:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:43:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:43:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:43:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:43:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:43:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:43:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:43:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:43:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:43:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:43:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:43:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:43:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:43:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:43:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:43:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:43:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:43:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:43:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:43:31,265 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:43:31,265 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:43:31,265 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:43:31,265 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:43:31,265 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:43:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:43:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:43:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:43:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:43:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:43:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:43:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:43:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:43:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:43:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:43:31,269 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:43:31,270 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:43:31,270 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:43:31,270 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:43:31,270 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:43:31,271 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:43:31,271 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:43:31,271 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:43:31,271 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:43:31,271 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:43:31,271 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:43:31,271 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:43:31,271 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:43:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:43:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:43:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:43:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:43:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:43:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:43:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:43:31,272 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:43:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:43:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:43:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:43:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:43:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:43:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:43:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:43:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:43:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:43:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:43:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:43:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:43:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:43:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:43:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:43:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:43:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:43:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:43:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:43:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:43:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure cstrspn [2021-08-27 04:43:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:43:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:43:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:43:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:43:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:43:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:43:31,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:43:31,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:43:31,935 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 04:43:31,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:43:31 BoogieIcfgContainer [2021-08-27 04:43:31,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:43:31,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:43:31,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:43:31,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:43:31,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:43:30" (1/3) ... [2021-08-27 04:43:31,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa5f782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:43:31, skipping insertion in model container [2021-08-27 04:43:31,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:31" (2/3) ... [2021-08-27 04:43:31,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa5f782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:43:31, skipping insertion in model container [2021-08-27 04:43:31,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:43:31" (3/3) ... [2021-08-27 04:43:31,942 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2021-08-27 04:43:31,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:43:31,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-08-27 04:43:31,994 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:43:32,006 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 04:43:32,006 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-08-27 04:43:32,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:43:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:43:32,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:32,030 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:32,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1274980559, now seen corresponding path program 1 times [2021-08-27 04:43:32,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:32,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087435641] [2021-08-27 04:43:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:32,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:32,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:32,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:32,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087435641] [2021-08-27 04:43:32,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087435641] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:32,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:32,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:43:32,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91042862] [2021-08-27 04:43:32,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:43:32,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:32,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:43:32,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:32,268 INFO L87 Difference]: Start difference. First operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:32,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:32,499 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-08-27 04:43:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:43:32,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 04:43:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:32,506 INFO L225 Difference]: With dead ends: 83 [2021-08-27 04:43:32,506 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 04:43:32,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:43:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 04:43:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-08-27 04:43:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-08-27 04:43:32,530 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-08-27 04:43:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:32,530 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-08-27 04:43:32,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-08-27 04:43:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:43:32,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:32,531 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:32,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:43:32,532 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:32,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1276827601, now seen corresponding path program 1 times [2021-08-27 04:43:32,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:32,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961203650] [2021-08-27 04:43:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:32,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:32,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:32,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:32,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961203650] [2021-08-27 04:43:32,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961203650] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:32,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:32,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:43:32,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210353806] [2021-08-27 04:43:32,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:43:32,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:32,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:43:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:32,623 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:32,818 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-08-27 04:43:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:43:32,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 04:43:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:32,820 INFO L225 Difference]: With dead ends: 84 [2021-08-27 04:43:32,820 INFO L226 Difference]: Without dead ends: 84 [2021-08-27 04:43:32,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:43:32,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-27 04:43:32,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-08-27 04:43:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.725) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:43:32,825 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 11 [2021-08-27 04:43:32,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:32,825 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:43:32,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:32,826 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:43:32,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:43:32,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:32,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:32,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:43:32,827 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:32,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1276827600, now seen corresponding path program 1 times [2021-08-27 04:43:32,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:32,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183519106] [2021-08-27 04:43:32,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:32,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:32,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:32,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:32,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183519106] [2021-08-27 04:43:32,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183519106] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:32,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:32,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:43:32,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273363565] [2021-08-27 04:43:32,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:43:32,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:43:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:43:32,866 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:32,985 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-08-27 04:43:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:43:32,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 04:43:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:32,986 INFO L225 Difference]: With dead ends: 62 [2021-08-27 04:43:32,986 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 04:43:32,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:43:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 04:43:32,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 04:43:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.65) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-08-27 04:43:32,990 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2021-08-27 04:43:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:32,990 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-08-27 04:43:32,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-08-27 04:43:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:43:32,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:32,991 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:32,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:43:32,992 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:32,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1190586438, now seen corresponding path program 1 times [2021-08-27 04:43:32,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:32,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240469269] [2021-08-27 04:43:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:32,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:33,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:33,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240469269] [2021-08-27 04:43:33,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240469269] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:33,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:33,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:43:33,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089887379] [2021-08-27 04:43:33,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:43:33,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:43:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:33,064 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:33,191 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-08-27 04:43:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:43:33,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:43:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:33,193 INFO L225 Difference]: With dead ends: 61 [2021-08-27 04:43:33,193 INFO L226 Difference]: Without dead ends: 61 [2021-08-27 04:43:33,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:43:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-27 04:43:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-08-27 04:43:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.625) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-08-27 04:43:33,196 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-08-27 04:43:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:33,197 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-08-27 04:43:33,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-08-27 04:43:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:43:33,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:33,197 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:33,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:43:33,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:33,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1190586490, now seen corresponding path program 1 times [2021-08-27 04:43:33,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:33,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508351205] [2021-08-27 04:43:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:33,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:33,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:33,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508351205] [2021-08-27 04:43:33,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508351205] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:33,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:33,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:43:33,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019504167] [2021-08-27 04:43:33,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:43:33,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:33,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:43:33,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:33,251 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:33,352 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-08-27 04:43:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:43:33,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:43:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:33,354 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:43:33,354 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:43:33,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:43:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:43:33,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-08-27 04:43:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 66 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:33,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-08-27 04:43:33,357 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2021-08-27 04:43:33,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:33,358 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-08-27 04:43:33,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:33,358 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-08-27 04:43:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:43:33,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:33,359 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:33,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:43:33,359 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1247844792, now seen corresponding path program 1 times [2021-08-27 04:43:33,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:33,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853726694] [2021-08-27 04:43:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:33,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:33,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:33,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853726694] [2021-08-27 04:43:33,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853726694] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:33,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:33,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:43:33,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495489148] [2021-08-27 04:43:33,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:43:33,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:43:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:43:33,385 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:33,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:33,449 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-08-27 04:43:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:43:33,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:43:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:33,450 INFO L225 Difference]: With dead ends: 70 [2021-08-27 04:43:33,450 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 04:43:33,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:43:33,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 04:43:33,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-27 04:43:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 64 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-08-27 04:43:33,453 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2021-08-27 04:43:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:33,453 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-08-27 04:43:33,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-08-27 04:43:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:43:33,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:33,454 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:33,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:43:33,454 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:33,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1247844793, now seen corresponding path program 1 times [2021-08-27 04:43:33,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:33,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413351940] [2021-08-27 04:43:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:33,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:33,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:33,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413351940] [2021-08-27 04:43:33,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413351940] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:33,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:33,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:43:33,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101664984] [2021-08-27 04:43:33,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:43:33,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:43:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:43:33,521 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:33,635 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-08-27 04:43:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:43:33,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:43:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:33,637 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:43:33,637 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:43:33,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:43:33,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:43:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-08-27 04:43:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.509433962264151) internal successors, (80), 66 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-08-27 04:43:33,640 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2021-08-27 04:43:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:33,641 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-08-27 04:43:33,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-08-27 04:43:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:43:33,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:33,641 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:33,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:43:33,642 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1746526086, now seen corresponding path program 1 times [2021-08-27 04:43:33,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:33,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168512557] [2021-08-27 04:43:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:33,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:33,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:33,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168512557] [2021-08-27 04:43:33,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168512557] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:33,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:33,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:43:33,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984476615] [2021-08-27 04:43:33,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:43:33,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:43:33,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:33,683 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:33,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:33,759 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-08-27 04:43:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:43:33,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 04:43:33,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:33,760 INFO L225 Difference]: With dead ends: 71 [2021-08-27 04:43:33,760 INFO L226 Difference]: Without dead ends: 71 [2021-08-27 04:43:33,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:43:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-27 04:43:33,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-27 04:43:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.490566037735849) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-08-27 04:43:33,765 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2021-08-27 04:43:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:33,765 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-08-27 04:43:33,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-08-27 04:43:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:43:33,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:33,766 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:33,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 04:43:33,766 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1874075756, now seen corresponding path program 1 times [2021-08-27 04:43:33,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:33,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202824113] [2021-08-27 04:43:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:33,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:33,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:33,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202824113] [2021-08-27 04:43:33,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202824113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:33,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471852417] [2021-08-27 04:43:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:33,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:33,829 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) [2021-08-27 04:43:33,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 04:43:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:33,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:43:33,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:34,000 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:43:34,001 INFO L388 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 18 treesize of output 19 [2021-08-27 04:43:34,005 INFO L388 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 13 [2021-08-27 04:43:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:34,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471852417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:34,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:34,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:43:34,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103348810] [2021-08-27 04:43:34,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:43:34,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:34,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:43:34,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:43:34,098 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:34,223 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-08-27 04:43:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:43:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 04:43:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:34,224 INFO L225 Difference]: With dead ends: 90 [2021-08-27 04:43:34,224 INFO L226 Difference]: Without dead ends: 90 [2021-08-27 04:43:34,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:43:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-27 04:43:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-08-27 04:43:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 60 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-08-27 04:43:34,228 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 15 [2021-08-27 04:43:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:34,228 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-08-27 04:43:34,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-08-27 04:43:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:43:34,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:34,229 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:34,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:34,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:34,449 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrspnErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:34,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1524736657, now seen corresponding path program 1 times [2021-08-27 04:43:34,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:34,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114658337] [2021-08-27 04:43:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:34,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:34,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:34,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:34,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114658337] [2021-08-27 04:43:34,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114658337] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:34,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:34,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:43:34,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736588931] [2021-08-27 04:43:34,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:43:34,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:34,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:43:34,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:43:34,514 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:34,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:34,618 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-27 04:43:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:43:34,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 04:43:34,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:34,619 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:43:34,619 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:43:34,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:43:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:43:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-27 04:43:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:43:34,631 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-08-27 04:43:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:34,632 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:43:34,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:43:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:43:34,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:34,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:34,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:43:34,634 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:34,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:34,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1524736656, now seen corresponding path program 1 times [2021-08-27 04:43:34,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:34,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667634908] [2021-08-27 04:43:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:34,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:34,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:34,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:34,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667634908] [2021-08-27 04:43:34,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667634908] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:34,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:34,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:43:34,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979810379] [2021-08-27 04:43:34,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:43:34,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:43:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:43:34,733 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:34,904 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-08-27 04:43:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:43:34,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 04:43:34,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:34,905 INFO L225 Difference]: With dead ends: 86 [2021-08-27 04:43:34,906 INFO L226 Difference]: Without dead ends: 86 [2021-08-27 04:43:34,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:43:34,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-27 04:43:34,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-08-27 04:43:34,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 61 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-08-27 04:43:34,908 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-08-27 04:43:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:34,908 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-08-27 04:43:34,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-08-27 04:43:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:43:34,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:34,909 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:34,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 04:43:34,909 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:34,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:34,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1869159940, now seen corresponding path program 1 times [2021-08-27 04:43:34,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:34,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865174227] [2021-08-27 04:43:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:34,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:34,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:34,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:34,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865174227] [2021-08-27 04:43:34,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865174227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:34,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142024122] [2021-08-27 04:43:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:34,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:34,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:35,009 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) [2021-08-27 04:43:35,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 04:43:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:35,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:43:35,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:35,192 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:43:35,192 INFO L388 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 9 treesize of output 15 [2021-08-27 04:43:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:35,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142024122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:35,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:35,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-27 04:43:35,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426398489] [2021-08-27 04:43:35,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:43:35,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:43:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:43:35,274 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:35,418 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-08-27 04:43:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:43:35,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 04:43:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:35,419 INFO L225 Difference]: With dead ends: 74 [2021-08-27 04:43:35,419 INFO L226 Difference]: Without dead ends: 74 [2021-08-27 04:43:35,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:43:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-27 04:43:35,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2021-08-27 04:43:35,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.38) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:43:35,421 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-08-27 04:43:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:35,421 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:43:35,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:43:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:43:35,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:35,422 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:35,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:35,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-27 04:43:35,622 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrspnErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:35,623 INFO L82 PathProgramCache]: Analyzing trace with hash 182222645, now seen corresponding path program 1 times [2021-08-27 04:43:35,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:35,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228561290] [2021-08-27 04:43:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:35,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:35,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:35,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:35,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228561290] [2021-08-27 04:43:35,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228561290] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:35,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:35,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:43:35,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669906259] [2021-08-27 04:43:35,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:43:35,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:43:35,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:43:35,668 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:35,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:35,784 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-27 04:43:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:43:35,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-27 04:43:35,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:35,785 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:43:35,785 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:43:35,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:43:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:43:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-08-27 04:43:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-08-27 04:43:35,787 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 21 [2021-08-27 04:43:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:35,787 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-08-27 04:43:35,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-08-27 04:43:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:43:35,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:35,788 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:35,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 04:43:35,788 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:35,788 INFO L82 PathProgramCache]: Analyzing trace with hash 182222646, now seen corresponding path program 1 times [2021-08-27 04:43:35,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:35,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609922351] [2021-08-27 04:43:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:35,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:35,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:35,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:35,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609922351] [2021-08-27 04:43:35,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609922351] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:35,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:35,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 04:43:35,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12539265] [2021-08-27 04:43:35,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:43:35,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:43:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:43:35,866 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:36,056 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-08-27 04:43:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:43:36,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-27 04:43:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:36,057 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:43:36,057 INFO L226 Difference]: Without dead ends: 76 [2021-08-27 04:43:36,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:43:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-27 04:43:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-08-27 04:43:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 62 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-08-27 04:43:36,059 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2021-08-27 04:43:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:36,059 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-08-27 04:43:36,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-08-27 04:43:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 04:43:36,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:36,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:36,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 04:43:36,060 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:36,060 INFO L82 PathProgramCache]: Analyzing trace with hash -994936542, now seen corresponding path program 1 times [2021-08-27 04:43:36,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:36,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611134943] [2021-08-27 04:43:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:36,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:43:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:36,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:36,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611134943] [2021-08-27 04:43:36,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611134943] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:36,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:36,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:43:36,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212398404] [2021-08-27 04:43:36,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:43:36,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:43:36,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:36,105 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:36,152 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-08-27 04:43:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:43:36,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-08-27 04:43:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:36,153 INFO L225 Difference]: With dead ends: 67 [2021-08-27 04:43:36,153 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 04:43:36,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 04:43:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 04:43:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-08-27 04:43:36,155 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 23 [2021-08-27 04:43:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:36,156 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-08-27 04:43:36,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:43:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-08-27 04:43:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 04:43:36,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:36,156 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:43:36,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 04:43:36,156 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:36,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:36,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1032720461, now seen corresponding path program 1 times [2021-08-27 04:43:36,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:36,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918495657] [2021-08-27 04:43:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:36,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:36,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:36,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918495657] [2021-08-27 04:43:36,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918495657] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:36,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:36,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:43:36,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350791294] [2021-08-27 04:43:36,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:43:36,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:36,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:43:36,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:43:36,197 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:36,245 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-27 04:43:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:43:36,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-08-27 04:43:36,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:36,246 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:43:36,246 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:43:36,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:43:36,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-27 04:43:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 59 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:43:36,248 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 25 [2021-08-27 04:43:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:36,248 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:43:36,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:43:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:43:36,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:36,249 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:43:36,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 04:43:36,249 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:36,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:36,250 INFO L82 PathProgramCache]: Analyzing trace with hash 301059978, now seen corresponding path program 1 times [2021-08-27 04:43:36,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:36,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698946125] [2021-08-27 04:43:36,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:36,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:36,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:36,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698946125] [2021-08-27 04:43:36,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698946125] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:36,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:36,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 04:43:36,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766451733] [2021-08-27 04:43:36,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:43:36,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:43:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:43:36,355 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:36,542 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-08-27 04:43:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:43:36,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-08-27 04:43:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:36,543 INFO L225 Difference]: With dead ends: 77 [2021-08-27 04:43:36,543 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 04:43:36,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:43:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 04:43:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-27 04:43:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.26) internal successors, (63), 54 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-08-27 04:43:36,545 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2021-08-27 04:43:36,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:36,545 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-08-27 04:43:36,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-08-27 04:43:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:43:36,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:36,545 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:43:36,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 04:43:36,545 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:36,546 INFO L82 PathProgramCache]: Analyzing trace with hash 723761804, now seen corresponding path program 1 times [2021-08-27 04:43:36,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:36,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492606318] [2021-08-27 04:43:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:36,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:36,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:36,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492606318] [2021-08-27 04:43:36,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492606318] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:36,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:36,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:43:36,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773463001] [2021-08-27 04:43:36,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:43:36,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:36,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:43:36,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:43:36,687 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:36,879 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-08-27 04:43:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:43:36,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-08-27 04:43:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:36,880 INFO L225 Difference]: With dead ends: 80 [2021-08-27 04:43:36,880 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 04:43:36,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:43:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 04:43:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-08-27 04:43:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-08-27 04:43:36,881 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 27 [2021-08-27 04:43:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:36,881 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-08-27 04:43:36,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-08-27 04:43:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 04:43:36,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:36,882 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:43:36,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 04:43:36,882 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:36,882 INFO L82 PathProgramCache]: Analyzing trace with hash 63626319, now seen corresponding path program 1 times [2021-08-27 04:43:36,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:36,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138531039] [2021-08-27 04:43:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:36,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:36,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:36,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138531039] [2021-08-27 04:43:36,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138531039] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:36,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:36,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:43:36,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929705975] [2021-08-27 04:43:36,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:43:36,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:43:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:43:36,997 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:37,273 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-08-27 04:43:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:43:37,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-08-27 04:43:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:37,274 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:43:37,274 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:43:37,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:43:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:43:37,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-08-27 04:43:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 73 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-08-27 04:43:37,276 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 31 [2021-08-27 04:43:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:37,276 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-08-27 04:43:37,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-08-27 04:43:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 04:43:37,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:37,277 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:43:37,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-27 04:43:37,277 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:37,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:37,277 INFO L82 PathProgramCache]: Analyzing trace with hash -70387187, now seen corresponding path program 1 times [2021-08-27 04:43:37,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:37,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323999139] [2021-08-27 04:43:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:37,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:37,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:37,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:37,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323999139] [2021-08-27 04:43:37,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323999139] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:37,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:37,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 04:43:37,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487217816] [2021-08-27 04:43:37,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 04:43:37,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:37,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 04:43:37,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-27 04:43:37,430 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:37,686 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-08-27 04:43:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:43:37,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-08-27 04:43:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:37,687 INFO L225 Difference]: With dead ends: 103 [2021-08-27 04:43:37,687 INFO L226 Difference]: Without dead ends: 103 [2021-08-27 04:43:37,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:43:37,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-27 04:43:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-08-27 04:43:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 74 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-08-27 04:43:37,703 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 31 [2021-08-27 04:43:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:37,703 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-08-27 04:43:37,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:37,703 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-08-27 04:43:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 04:43:37,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:37,704 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:43:37,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-27 04:43:37,704 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:37,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:37,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2142096765, now seen corresponding path program 1 times [2021-08-27 04:43:37,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:37,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527847129] [2021-08-27 04:43:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:37,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:37,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:37,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:37,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527847129] [2021-08-27 04:43:37,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527847129] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:37,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:37,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:43:37,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085904594] [2021-08-27 04:43:37,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:43:37,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:37,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:43:37,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:43:37,816 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:38,065 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-08-27 04:43:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:43:38,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-08-27 04:43:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:38,066 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:43:38,066 INFO L226 Difference]: Without dead ends: 56 [2021-08-27 04:43:38,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-08-27 04:43:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-27 04:43:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-08-27 04:43:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 49 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-08-27 04:43:38,068 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2021-08-27 04:43:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:38,068 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-08-27 04:43:38,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-08-27 04:43:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 04:43:38,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:38,069 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 04:43:38,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-27 04:43:38,069 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:38,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1176807056, now seen corresponding path program 1 times [2021-08-27 04:43:38,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:38,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650557227] [2021-08-27 04:43:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:38,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:38,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:38,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:38,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650557227] [2021-08-27 04:43:38,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650557227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:38,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090440007] [2021-08-27 04:43:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:38,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:38,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:38,194 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) [2021-08-27 04:43:38,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:43:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:38,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 04:43:38,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:38,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090440007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:38,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:38,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-27 04:43:38,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749677914] [2021-08-27 04:43:38,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:43:38,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:38,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:43:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:43:38,533 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:38,777 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-08-27 04:43:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:43:38,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-08-27 04:43:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:38,780 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:43:38,780 INFO L226 Difference]: Without dead ends: 74 [2021-08-27 04:43:38,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:43:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-27 04:43:38,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-08-27 04:43:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-08-27 04:43:38,782 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 35 [2021-08-27 04:43:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:38,782 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-08-27 04:43:38,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-08-27 04:43:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 04:43:38,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:38,783 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:38,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:38,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:38,998 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:38,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1560164987, now seen corresponding path program 1 times [2021-08-27 04:43:38,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:38,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535043653] [2021-08-27 04:43:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:38,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:39,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:39,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:39,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535043653] [2021-08-27 04:43:39,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535043653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:39,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855702230] [2021-08-27 04:43:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:39,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:39,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:39,106 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) [2021-08-27 04:43:39,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 04:43:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:39,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 04:43:39,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:39,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855702230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:39,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:39,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-27 04:43:39,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827783417] [2021-08-27 04:43:39,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 04:43:39,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 04:43:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:43:39,537 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 16 states, 15 states have (on average 4.2) internal successors, (63), 13 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:39,805 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2021-08-27 04:43:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:43:39,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 13 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-08-27 04:43:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:39,806 INFO L225 Difference]: With dead ends: 122 [2021-08-27 04:43:39,806 INFO L226 Difference]: Without dead ends: 122 [2021-08-27 04:43:39,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:43:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-27 04:43:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-08-27 04:43:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 81 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-08-27 04:43:39,808 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 38 [2021-08-27 04:43:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:39,808 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-08-27 04:43:39,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 13 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-08-27 04:43:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 04:43:39,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:39,809 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:39,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:40,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:40,026 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:40,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:40,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1664191332, now seen corresponding path program 2 times [2021-08-27 04:43:40,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:40,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266041054] [2021-08-27 04:43:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:40,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:40,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:40,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:40,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266041054] [2021-08-27 04:43:40,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266041054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:40,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399656042] [2021-08-27 04:43:40,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:43:40,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:40,222 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) [2021-08-27 04:43:40,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 04:43:40,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:43:40,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:40,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-27 04:43:40,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:40,541 INFO L388 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 21 treesize of output 17 [2021-08-27 04:43:40,815 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-08-27 04:43:40,815 INFO L388 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 24 treesize of output 16 [2021-08-27 04:43:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:40,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399656042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:40,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:40,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-08-27 04:43:40,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574492321] [2021-08-27 04:43:40,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-27 04:43:40,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:40,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-27 04:43:40,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:43:40,859 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 26 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:41,436 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2021-08-27 04:43:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:43:41,436 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-08-27 04:43:41,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:41,437 INFO L225 Difference]: With dead ends: 134 [2021-08-27 04:43:41,437 INFO L226 Difference]: Without dead ends: 128 [2021-08-27 04:43:41,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:43:41,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-27 04:43:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2021-08-27 04:43:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 117 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2021-08-27 04:43:41,439 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 41 [2021-08-27 04:43:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:41,439 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2021-08-27 04:43:41,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2021-08-27 04:43:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 04:43:41,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:41,440 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:41,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:41,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-27 04:43:41,649 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash 321433639, now seen corresponding path program 3 times [2021-08-27 04:43:41,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:41,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165245207] [2021-08-27 04:43:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:41,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:41,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:41,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:41,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165245207] [2021-08-27 04:43:41,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165245207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:41,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357902614] [2021-08-27 04:43:41,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:43:41,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:41,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:41,810 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) [2021-08-27 04:43:41,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 04:43:42,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-27 04:43:42,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-27 04:43:42,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:42,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357902614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:42,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:42,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-27 04:43:42,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458128088] [2021-08-27 04:43:42,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 04:43:42,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:42,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 04:43:42,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-27 04:43:42,278 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:42,773 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2021-08-27 04:43:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:43:42,774 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-08-27 04:43:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:42,775 INFO L225 Difference]: With dead ends: 170 [2021-08-27 04:43:42,775 INFO L226 Difference]: Without dead ends: 168 [2021-08-27 04:43:42,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:43:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-27 04:43:42,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 135. [2021-08-27 04:43:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 125 states have (on average 1.184) internal successors, (148), 129 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2021-08-27 04:43:42,779 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 45 [2021-08-27 04:43:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:42,779 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2021-08-27 04:43:42,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2021-08-27 04:43:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:43:42,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:42,780 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:42,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:42,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:42,997 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:42,998 INFO L82 PathProgramCache]: Analyzing trace with hash -959683498, now seen corresponding path program 2 times [2021-08-27 04:43:42,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:42,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705086821] [2021-08-27 04:43:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:42,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:43,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:43,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:43,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705086821] [2021-08-27 04:43:43,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705086821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:43,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185622074] [2021-08-27 04:43:43,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:43:43,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:43,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:43,230 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) [2021-08-27 04:43:43,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 04:43:43,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:43:43,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-27 04:43:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:43,476 INFO L388 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 [2021-08-27 04:43:43,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:43:43,669 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:43:43,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 04:43:44,106 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:43:44,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-08-27 04:43:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:44,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185622074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:44,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:44,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-27 04:43:44,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995486928] [2021-08-27 04:43:44,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 04:43:44,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:44,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 04:43:44,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-08-27 04:43:44,150 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:44,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:44,862 INFO L93 Difference]: Finished difference Result 214 states and 238 transitions. [2021-08-27 04:43:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:43:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-27 04:43:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:44,864 INFO L225 Difference]: With dead ends: 214 [2021-08-27 04:43:44,864 INFO L226 Difference]: Without dead ends: 190 [2021-08-27 04:43:44,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 611.3ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:43:44,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-08-27 04:43:44,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2021-08-27 04:43:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 170 states have (on average 1.1705882352941177) internal successors, (199), 174 states have internal predecessors, (199), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 205 transitions. [2021-08-27 04:43:44,867 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 205 transitions. Word has length 51 [2021-08-27 04:43:44,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:44,867 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 205 transitions. [2021-08-27 04:43:44,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 205 transitions. [2021-08-27 04:43:44,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:43:44,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:44,868 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:44,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:45,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:45,077 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:45,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1458059333, now seen corresponding path program 4 times [2021-08-27 04:43:45,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:45,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045817633] [2021-08-27 04:43:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:45,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:45,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:45,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:45,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045817633] [2021-08-27 04:43:45,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045817633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:45,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662536804] [2021-08-27 04:43:45,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:43:45,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:45,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:45,378 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) [2021-08-27 04:43:45,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 04:43:45,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:43:45,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:45,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-27 04:43:45,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:45,693 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:43:45,694 INFO L388 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 9 treesize of output 15 [2021-08-27 04:43:46,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-27 04:43:46,387 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 04:43:46,387 INFO L388 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 34 treesize of output 25 [2021-08-27 04:43:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:46,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662536804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:46,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:46,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 32 [2021-08-27 04:43:46,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415642706] [2021-08-27 04:43:46,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:43:46,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:43:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:43:46,404 INFO L87 Difference]: Start difference. First operand 181 states and 205 transitions. Second operand has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:47,991 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2021-08-27 04:43:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-27 04:43:47,992 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-27 04:43:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:47,993 INFO L225 Difference]: With dead ends: 284 [2021-08-27 04:43:47,993 INFO L226 Difference]: Without dead ends: 255 [2021-08-27 04:43:47,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1355.4ms TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-08-27 04:43:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-27 04:43:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2021-08-27 04:43:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.1531531531531531) internal successors, (256), 226 states have internal predecessors, (256), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2021-08-27 04:43:47,997 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 51 [2021-08-27 04:43:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:47,997 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2021-08-27 04:43:47,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2021-08-27 04:43:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 04:43:47,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:47,998 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:48,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:48,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 04:43:48,199 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:48,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1549396802, now seen corresponding path program 5 times [2021-08-27 04:43:48,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:48,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342933692] [2021-08-27 04:43:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:48,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:48,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:48,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:48,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342933692] [2021-08-27 04:43:48,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342933692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:48,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224183860] [2021-08-27 04:43:48,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:43:48,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:48,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:48,401 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) [2021-08-27 04:43:48,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:43:48,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-27 04:43:48,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:48,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 04:43:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:48,744 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:43:48,744 INFO L388 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 9 treesize of output 15 [2021-08-27 04:43:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:49,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224183860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:49,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:49,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 18 [2021-08-27 04:43:49,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456746189] [2021-08-27 04:43:49,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:43:49,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:43:49,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:43:49,092 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:49,703 INFO L93 Difference]: Finished difference Result 298 states and 330 transitions. [2021-08-27 04:43:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:43:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-08-27 04:43:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:49,705 INFO L225 Difference]: With dead ends: 298 [2021-08-27 04:43:49,705 INFO L226 Difference]: Without dead ends: 296 [2021-08-27 04:43:49,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:43:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-08-27 04:43:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 252. [2021-08-27 04:43:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 240 states have (on average 1.15) internal successors, (276), 244 states have internal predecessors, (276), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2021-08-27 04:43:49,710 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 55 [2021-08-27 04:43:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:49,710 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2021-08-27 04:43:49,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2021-08-27 04:43:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 04:43:49,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:49,711 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:49,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:49,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-27 04:43:49,929 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:49,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1293443559, now seen corresponding path program 3 times [2021-08-27 04:43:49,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:49,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659042018] [2021-08-27 04:43:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:49,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:50,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:50,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:50,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659042018] [2021-08-27 04:43:50,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659042018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:50,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784973853] [2021-08-27 04:43:50,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:43:50,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:50,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:50,115 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) [2021-08-27 04:43:50,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 04:43:50,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-27 04:43:50,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-27 04:43:50,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:50,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784973853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:50,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:50,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-27 04:43:50,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305949443] [2021-08-27 04:43:50,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:43:50,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:50,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:43:50,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:43:50,797 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:51,284 INFO L93 Difference]: Finished difference Result 403 states and 442 transitions. [2021-08-27 04:43:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:43:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-08-27 04:43:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:51,286 INFO L225 Difference]: With dead ends: 403 [2021-08-27 04:43:51,286 INFO L226 Difference]: Without dead ends: 403 [2021-08-27 04:43:51,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:43:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-08-27 04:43:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 322. [2021-08-27 04:43:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 310 states have (on average 1.1483870967741936) internal successors, (356), 314 states have internal predecessors, (356), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 363 transitions. [2021-08-27 04:43:51,292 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 363 transitions. Word has length 55 [2021-08-27 04:43:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:51,292 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 363 transitions. [2021-08-27 04:43:51,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 363 transitions. [2021-08-27 04:43:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-27 04:43:51,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:51,293 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:51,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:51,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-27 04:43:51,509 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1254563602, now seen corresponding path program 6 times [2021-08-27 04:43:51,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:51,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083785582] [2021-08-27 04:43:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:51,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:51,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:51,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:51,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083785582] [2021-08-27 04:43:51,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083785582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:51,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452319570] [2021-08-27 04:43:51,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:43:51,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:51,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:51,720 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) [2021-08-27 04:43:51,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 04:43:52,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:43:52,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:52,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 04:43:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:52,137 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:43:52,138 INFO L388 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 9 treesize of output 15 [2021-08-27 04:43:52,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:43:52,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:43:52,926 INFO L388 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 28 treesize of output 28 [2021-08-27 04:43:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:53,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452319570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:53,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:53,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-08-27 04:43:53,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241088493] [2021-08-27 04:43:53,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 04:43:53,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:53,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 04:43:53,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:43:53,095 INFO L87 Difference]: Start difference. First operand 322 states and 363 transitions. Second operand has 35 states, 33 states have (on average 3.242424242424242) internal successors, (107), 32 states have internal predecessors, (107), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:54,938 INFO L93 Difference]: Finished difference Result 508 states and 554 transitions. [2021-08-27 04:43:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 04:43:54,938 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.242424242424242) internal successors, (107), 32 states have internal predecessors, (107), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-08-27 04:43:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:54,940 INFO L225 Difference]: With dead ends: 508 [2021-08-27 04:43:54,940 INFO L226 Difference]: Without dead ends: 470 [2021-08-27 04:43:54,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1288.5ms TimeCoverageRelationStatistics Valid=372, Invalid=3168, Unknown=0, NotChecked=0, Total=3540 [2021-08-27 04:43:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-08-27 04:43:54,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 412. [2021-08-27 04:43:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 399 states have (on average 1.137844611528822) internal successors, (454), 403 states have internal predecessors, (454), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 462 transitions. [2021-08-27 04:43:54,948 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 462 transitions. Word has length 61 [2021-08-27 04:43:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:54,948 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 462 transitions. [2021-08-27 04:43:54,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.242424242424242) internal successors, (107), 32 states have internal predecessors, (107), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 462 transitions. [2021-08-27 04:43:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-27 04:43:54,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:54,951 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-08-27 04:43:54,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:55,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:55,170 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1950827605, now seen corresponding path program 7 times [2021-08-27 04:43:55,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:55,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144554091] [2021-08-27 04:43:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:55,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:55,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:55,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:55,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144554091] [2021-08-27 04:43:55,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144554091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:55,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575534965] [2021-08-27 04:43:55,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:43:55,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:55,395 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) [2021-08-27 04:43:55,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 04:43:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:55,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 04:43:55,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:56,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575534965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:56,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:56,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-27 04:43:56,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852922327] [2021-08-27 04:43:56,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:43:56,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:43:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:43:56,222 INFO L87 Difference]: Start difference. First operand 412 states and 462 transitions. Second operand has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:56,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:56,958 INFO L93 Difference]: Finished difference Result 517 states and 572 transitions. [2021-08-27 04:43:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:43:56,958 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-08-27 04:43:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:56,960 INFO L225 Difference]: With dead ends: 517 [2021-08-27 04:43:56,960 INFO L226 Difference]: Without dead ends: 515 [2021-08-27 04:43:56,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 387.2ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:43:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-27 04:43:56,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 436. [2021-08-27 04:43:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 423 states have (on average 1.1371158392434988) internal successors, (481), 427 states have internal predecessors, (481), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 489 transitions. [2021-08-27 04:43:56,967 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 489 transitions. Word has length 65 [2021-08-27 04:43:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:56,967 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 489 transitions. [2021-08-27 04:43:56,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 489 transitions. [2021-08-27 04:43:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-27 04:43:56,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:56,968 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:56,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:57,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:57,187 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:57,187 INFO L82 PathProgramCache]: Analyzing trace with hash 694033474, now seen corresponding path program 4 times [2021-08-27 04:43:57,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:57,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145718198] [2021-08-27 04:43:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:57,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:57,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:57,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:57,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145718198] [2021-08-27 04:43:57,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145718198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:57,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611299328] [2021-08-27 04:43:57,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:43:57,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:57,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:57,876 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) [2021-08-27 04:43:57,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 04:43:58,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:43:58,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:58,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-27 04:43:58,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:58,392 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:43:58,392 INFO L388 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 9 treesize of output 15 [2021-08-27 04:43:58,404 INFO L388 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 [2021-08-27 04:43:58,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-27 04:43:58,885 INFO L388 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 28 treesize of output 27 [2021-08-27 04:44:00,233 INFO L388 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 36 treesize of output 28 [2021-08-27 04:44:00,999 INFO L354 Elim1Store]: treesize reduction 121, result has 6.2 percent of original size [2021-08-27 04:44:01,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 42 [2021-08-27 04:44:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:01,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611299328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:01,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:01,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2021-08-27 04:44:01,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289191100] [2021-08-27 04:44:01,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-27 04:44:01,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-27 04:44:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2021-08-27 04:44:01,042 INFO L87 Difference]: Start difference. First operand 436 states and 489 transitions. Second operand has 50 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 47 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:04,492 INFO L93 Difference]: Finished difference Result 821 states and 911 transitions. [2021-08-27 04:44:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-27 04:44:04,492 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 47 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-08-27 04:44:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:04,494 INFO L225 Difference]: With dead ends: 821 [2021-08-27 04:44:04,494 INFO L226 Difference]: Without dead ends: 771 [2021-08-27 04:44:04,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 3784.2ms TimeCoverageRelationStatistics Valid=709, Invalid=7481, Unknown=0, NotChecked=0, Total=8190 [2021-08-27 04:44:04,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-08-27 04:44:04,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 747. [2021-08-27 04:44:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 731 states have (on average 1.1422708618331054) internal successors, (835), 735 states have internal predecessors, (835), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 846 transitions. [2021-08-27 04:44:04,513 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 846 transitions. Word has length 68 [2021-08-27 04:44:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:04,513 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 846 transitions. [2021-08-27 04:44:04,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 47 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 846 transitions. [2021-08-27 04:44:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-27 04:44:04,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:04,515 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2021-08-27 04:44:04,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-27 04:44:04,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-27 04:44:04,729 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:44:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash -682229399, now seen corresponding path program 8 times [2021-08-27 04:44:04,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:04,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265229334] [2021-08-27 04:44:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:04,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:04,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:04,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:04,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265229334] [2021-08-27 04:44:04,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265229334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:04,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925265108] [2021-08-27 04:44:04,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:44:04,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:04,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:04,980 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) [2021-08-27 04:44:04,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 04:44:05,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:44:05,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:05,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 04:44:05,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:05,818 INFO L388 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 21 treesize of output 17 [2021-08-27 04:44:06,091 INFO L388 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 [2021-08-27 04:44:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:06,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925265108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:06,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:06,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 32 [2021-08-27 04:44:06,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480351413] [2021-08-27 04:44:06,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:44:06,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:44:06,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:44:06,106 INFO L87 Difference]: Start difference. First operand 747 states and 846 transitions. Second operand has 32 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:07,302 INFO L93 Difference]: Finished difference Result 1110 states and 1232 transitions. [2021-08-27 04:44:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-27 04:44:07,303 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-08-27 04:44:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:07,305 INFO L225 Difference]: With dead ends: 1110 [2021-08-27 04:44:07,305 INFO L226 Difference]: Without dead ends: 1057 [2021-08-27 04:44:07,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 556.1ms TimeCoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-08-27 04:44:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-08-27 04:44:07,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 959. [2021-08-27 04:44:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 941 states have (on average 1.1349628055260361) internal successors, (1068), 945 states have internal predecessors, (1068), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1081 transitions. [2021-08-27 04:44:07,318 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1081 transitions. Word has length 71 [2021-08-27 04:44:07,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:07,318 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 1081 transitions. [2021-08-27 04:44:07,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1081 transitions. [2021-08-27 04:44:07,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-27 04:44:07,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:07,320 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:07,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:07,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:07,535 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:44:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:07,535 INFO L82 PathProgramCache]: Analyzing trace with hash -853851937, now seen corresponding path program 5 times [2021-08-27 04:44:07,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:07,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471261375] [2021-08-27 04:44:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:07,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:07,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:07,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:07,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471261375] [2021-08-27 04:44:07,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471261375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:07,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867778494] [2021-08-27 04:44:07,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:44:07,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:07,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:07,682 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:07,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 04:44:08,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-27 04:44:08,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:08,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 04:44:08,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:08,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867778494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:08,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:08,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-08-27 04:44:08,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591737467] [2021-08-27 04:44:08,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:44:08,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:08,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:44:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:44:08,788 INFO L87 Difference]: Start difference. First operand 959 states and 1081 transitions. Second operand has 20 states, 19 states have (on average 5.526315789473684) internal successors, (105), 17 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:09,365 INFO L93 Difference]: Finished difference Result 1235 states and 1372 transitions. [2021-08-27 04:44:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:44:09,365 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.526315789473684) internal successors, (105), 17 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-08-27 04:44:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:09,368 INFO L225 Difference]: With dead ends: 1235 [2021-08-27 04:44:09,368 INFO L226 Difference]: Without dead ends: 1235 [2021-08-27 04:44:09,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:44:09,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-08-27 04:44:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1091. [2021-08-27 04:44:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1073 states have (on average 1.1332712022367195) internal successors, (1216), 1077 states have internal predecessors, (1216), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1229 transitions. [2021-08-27 04:44:09,384 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1229 transitions. Word has length 72 [2021-08-27 04:44:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:09,384 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1229 transitions. [2021-08-27 04:44:09,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.526315789473684) internal successors, (105), 17 states have internal predecessors, (105), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1229 transitions. [2021-08-27 04:44:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-27 04:44:09,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:09,386 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-08-27 04:44:09,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:09,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:09,601 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:44:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:09,601 INFO L82 PathProgramCache]: Analyzing trace with hash 646360812, now seen corresponding path program 9 times [2021-08-27 04:44:09,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:09,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059419428] [2021-08-27 04:44:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:09,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:09,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:09,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:09,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059419428] [2021-08-27 04:44:09,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059419428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:09,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255613023] [2021-08-27 04:44:09,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:44:09,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:09,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:09,881 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:09,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 04:44:10,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-27 04:44:10,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:10,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 04:44:10,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:11,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255613023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:11,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:11,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-08-27 04:44:11,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243057154] [2021-08-27 04:44:11,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 04:44:11,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 04:44:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:44:11,186 INFO L87 Difference]: Start difference. First operand 1091 states and 1229 transitions. Second operand has 35 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:12,207 INFO L93 Difference]: Finished difference Result 1346 states and 1502 transitions. [2021-08-27 04:44:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 04:44:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-08-27 04:44:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:12,210 INFO L225 Difference]: With dead ends: 1346 [2021-08-27 04:44:12,210 INFO L226 Difference]: Without dead ends: 1344 [2021-08-27 04:44:12,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:44:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-08-27 04:44:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1139. [2021-08-27 04:44:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1121 states have (on average 1.1338090990187333) internal successors, (1271), 1125 states have internal predecessors, (1271), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1284 transitions. [2021-08-27 04:44:12,228 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1284 transitions. Word has length 75 [2021-08-27 04:44:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:12,228 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1284 transitions. [2021-08-27 04:44:12,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1284 transitions. [2021-08-27 04:44:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-27 04:44:12,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:12,229 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:12,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-27 04:44:12,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-27 04:44:12,470 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:44:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:12,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1976019021, now seen corresponding path program 1 times [2021-08-27 04:44:12,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:12,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141059046] [2021-08-27 04:44:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:12,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:12,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 04:44:12,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:12,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141059046] [2021-08-27 04:44:12,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141059046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:12,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665187653] [2021-08-27 04:44:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:12,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:12,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:12,885 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:12,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 04:44:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-27 04:44:13,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:13,605 INFO L388 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 [2021-08-27 04:44:13,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:44:13,923 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:44:13,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 04:44:14,812 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:44:14,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-08-27 04:44:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 04:44:14,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665187653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:14,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:14,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 35 [2021-08-27 04:44:14,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843004073] [2021-08-27 04:44:14,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 04:44:14,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 04:44:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:44:14,875 INFO L87 Difference]: Start difference. First operand 1139 states and 1284 transitions. Second operand has 35 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 32 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:41,180 INFO L93 Difference]: Finished difference Result 1169 states and 1285 transitions. [2021-08-27 04:44:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 04:44:41,181 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 32 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-08-27 04:44:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:41,183 INFO L225 Difference]: With dead ends: 1169 [2021-08-27 04:44:41,183 INFO L226 Difference]: Without dead ends: 901 [2021-08-27 04:44:41,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 25797.3ms TimeCoverageRelationStatistics Valid=249, Invalid=2507, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 04:44:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-08-27 04:44:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 786. [2021-08-27 04:44:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 771 states have (on average 1.1335927367055771) internal successors, (874), 775 states have internal predecessors, (874), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 884 transitions. [2021-08-27 04:44:41,193 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 884 transitions. Word has length 78 [2021-08-27 04:44:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:41,193 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 884 transitions. [2021-08-27 04:44:41,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 32 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:41,194 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 884 transitions. [2021-08-27 04:44:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-08-27 04:44:41,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:41,195 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2021-08-27 04:44:41,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:41,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:41,409 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:44:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:41,409 INFO L82 PathProgramCache]: Analyzing trace with hash 648732352, now seen corresponding path program 10 times [2021-08-27 04:44:41,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:41,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340991515] [2021-08-27 04:44:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:41,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:41,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:41,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:41,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340991515] [2021-08-27 04:44:41,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340991515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:41,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118028531] [2021-08-27 04:44:41,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:44:41,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:41,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:41,743 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:41,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 04:44:42,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:44:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:42,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-27 04:44:42,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:42,610 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:44:42,610 INFO L388 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 9 treesize of output 15 [2021-08-27 04:44:43,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-27 04:44:43,658 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 04:44:43,659 INFO L388 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 34 treesize of output 25 [2021-08-27 04:44:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 86 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:43,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118028531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:43,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:43,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 41 [2021-08-27 04:44:43,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041941153] [2021-08-27 04:44:43,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 04:44:43,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 04:44:43,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 04:44:43,675 INFO L87 Difference]: Start difference. First operand 786 states and 884 transitions. Second operand has 41 states, 39 states have (on average 3.6923076923076925) internal successors, (144), 38 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:45,969 INFO L93 Difference]: Finished difference Result 1292 states and 1413 transitions. [2021-08-27 04:44:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-27 04:44:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.6923076923076925) internal successors, (144), 38 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-08-27 04:44:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:45,972 INFO L225 Difference]: With dead ends: 1292 [2021-08-27 04:44:45,972 INFO L226 Difference]: Without dead ends: 1173 [2021-08-27 04:44:45,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1665.6ms TimeCoverageRelationStatistics Valid=583, Invalid=5117, Unknown=0, NotChecked=0, Total=5700 [2021-08-27 04:44:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-08-27 04:44:45,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 953. [2021-08-27 04:44:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 937 states have (on average 1.1302027748132337) internal successors, (1059), 941 states have internal predecessors, (1059), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1070 transitions. [2021-08-27 04:44:45,984 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1070 transitions. Word has length 81 [2021-08-27 04:44:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:45,985 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1070 transitions. [2021-08-27 04:44:45,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.6923076923076925) internal successors, (144), 38 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1070 transitions. [2021-08-27 04:44:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-27 04:44:45,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:45,986 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-08-27 04:44:46,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:46,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:46,219 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:44:46,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:46,220 INFO L82 PathProgramCache]: Analyzing trace with hash -139541373, now seen corresponding path program 11 times [2021-08-27 04:44:46,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:46,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103139522] [2021-08-27 04:44:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:46,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:46,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:46,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:46,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103139522] [2021-08-27 04:44:46,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103139522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:46,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484097851] [2021-08-27 04:44:46,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:44:46,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:46,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:46,535 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:46,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 04:44:47,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-27 04:44:47,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-27 04:44:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:47,511 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:44:47,512 INFO L388 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 9 treesize of output 15 [2021-08-27 04:44:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:48,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484097851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:48,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:48,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 27 [2021-08-27 04:44:48,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333263036] [2021-08-27 04:44:48,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:44:48,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:44:48,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:44:48,115 INFO L87 Difference]: Start difference. First operand 953 states and 1070 transitions. Second operand has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:49,381 INFO L93 Difference]: Finished difference Result 1170 states and 1296 transitions. [2021-08-27 04:44:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:44:49,382 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-08-27 04:44:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:49,384 INFO L225 Difference]: With dead ends: 1170 [2021-08-27 04:44:49,384 INFO L226 Difference]: Without dead ends: 1168 [2021-08-27 04:44:49,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:44:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-08-27 04:44:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 989. [2021-08-27 04:44:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 973 states have (on average 1.1305241521068858) internal successors, (1100), 977 states have internal predecessors, (1100), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1111 transitions. [2021-08-27 04:44:49,398 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1111 transitions. Word has length 85 [2021-08-27 04:44:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:49,398 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1111 transitions. [2021-08-27 04:44:49,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1111 transitions. [2021-08-27 04:44:49,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-27 04:44:49,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:49,400 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-08-27 04:44:49,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:49,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:49,620 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:44:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2060735684, now seen corresponding path program 6 times [2021-08-27 04:44:49,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:49,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518627126] [2021-08-27 04:44:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:49,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:50,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:50,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:50,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518627126] [2021-08-27 04:44:50,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518627126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:50,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386542992] [2021-08-27 04:44:50,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:44:50,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:50,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:50,147 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:50,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 04:44:51,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:44:51,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:51,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-27 04:44:51,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:51,193 INFO L388 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 [2021-08-27 04:44:51,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:44:51,578 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:44:51,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 04:44:53,564 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-08-27 04:44:53,565 INFO L388 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 53 treesize of output 52 [2021-08-27 04:44:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:53,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386542992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:53,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:53,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 44 [2021-08-27 04:44:53,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618816407] [2021-08-27 04:44:53,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-27 04:44:53,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-27 04:44:53,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1791, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:44:53,612 INFO L87 Difference]: Start difference. First operand 989 states and 1111 transitions. Second operand has 44 states, 43 states have (on average 3.627906976744186) internal successors, (156), 41 states have internal predecessors, (156), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:46:35,371 INFO L93 Difference]: Finished difference Result 2315 states and 2564 transitions. [2021-08-27 04:46:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-27 04:46:35,371 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.627906976744186) internal successors, (156), 41 states have internal predecessors, (156), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-08-27 04:46:35,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:46:35,374 INFO L225 Difference]: With dead ends: 2315 [2021-08-27 04:46:35,374 INFO L226 Difference]: Without dead ends: 1452 [2021-08-27 04:46:35,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 94080.6ms TimeCoverageRelationStatistics Valid=516, Invalid=5489, Unknown=1, NotChecked=0, Total=6006 [2021-08-27 04:46:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-08-27 04:46:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1135. [2021-08-27 04:46:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1118 states have (on average 1.1368515205724508) internal successors, (1271), 1122 states have internal predecessors, (1271), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1283 transitions. [2021-08-27 04:46:35,390 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1283 transitions. Word has length 85 [2021-08-27 04:46:35,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:46:35,391 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1283 transitions. [2021-08-27 04:46:35,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.627906976744186) internal successors, (156), 41 states have internal predecessors, (156), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1283 transitions. [2021-08-27 04:46:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-27 04:46:35,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:46:35,392 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-08-27 04:46:35,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-27 04:46:35,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-27 04:46:35,611 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:46:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:46:35,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1146270783, now seen corresponding path program 7 times [2021-08-27 04:46:35,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:46:35,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264405098] [2021-08-27 04:46:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:46:35,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:46:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:35,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:46:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:35,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:46:35,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264405098] [2021-08-27 04:46:35,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264405098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:35,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889374346] [2021-08-27 04:46:35,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:46:35,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:35,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:46:35,825 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:46:35,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 04:46:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 04:46:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:46:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:37,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889374346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:37,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:46:37,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-08-27 04:46:37,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567127124] [2021-08-27 04:46:37,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-27 04:46:37,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:46:37,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-27 04:46:37,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:46:37,472 INFO L87 Difference]: Start difference. First operand 1135 states and 1283 transitions. Second operand has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:46:38,303 INFO L93 Difference]: Finished difference Result 1509 states and 1683 transitions. [2021-08-27 04:46:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:46:38,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-08-27 04:46:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:46:38,307 INFO L225 Difference]: With dead ends: 1509 [2021-08-27 04:46:38,307 INFO L226 Difference]: Without dead ends: 1509 [2021-08-27 04:46:38,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:46:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-08-27 04:46:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1316. [2021-08-27 04:46:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1299 states have (on average 1.134719014626636) internal successors, (1474), 1303 states have internal predecessors, (1474), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1486 transitions. [2021-08-27 04:46:38,320 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1486 transitions. Word has length 89 [2021-08-27 04:46:38,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:46:38,321 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 1486 transitions. [2021-08-27 04:46:38,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1486 transitions. [2021-08-27 04:46:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-27 04:46:38,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:46:38,322 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 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] [2021-08-27 04:46:38,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 04:46:38,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-27 04:46:38,541 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:46:38,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:46:38,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1870911721, now seen corresponding path program 12 times [2021-08-27 04:46:38,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:46:38,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208281562] [2021-08-27 04:46:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:46:38,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:46:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:38,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:46:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:38,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:46:38,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208281562] [2021-08-27 04:46:38,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208281562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:38,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460198605] [2021-08-27 04:46:38,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:46:38,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:38,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:46:38,928 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:46:38,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 04:46:40,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-27 04:46:40,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:46:40,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-27 04:46:40,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:46:40,055 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:46:40,055 INFO L388 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 9 treesize of output 15 [2021-08-27 04:46:40,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:46:41,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:46:41,531 INFO L388 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 28 treesize of output 28 [2021-08-27 04:46:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:41,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460198605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:41,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:46:41,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 48 [2021-08-27 04:46:41,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725642437] [2021-08-27 04:46:41,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-27 04:46:41,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:46:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-27 04:46:41,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2086, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:46:41,843 INFO L87 Difference]: Start difference. First operand 1316 states and 1486 transitions. Second operand has 48 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 45 states have internal predecessors, (170), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:46:46,339 INFO L93 Difference]: Finished difference Result 2363 states and 2591 transitions. [2021-08-27 04:46:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-27 04:46:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 45 states have internal predecessors, (170), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-08-27 04:46:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:46:46,343 INFO L225 Difference]: With dead ends: 2363 [2021-08-27 04:46:46,343 INFO L226 Difference]: Without dead ends: 2074 [2021-08-27 04:46:46,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 3355.1ms TimeCoverageRelationStatistics Valid=814, Invalid=6842, Unknown=0, NotChecked=0, Total=7656 [2021-08-27 04:46:46,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-08-27 04:46:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1608. [2021-08-27 04:46:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1590 states have (on average 1.1327044025157234) internal successors, (1801), 1594 states have internal predecessors, (1801), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 1814 transitions. [2021-08-27 04:46:46,364 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 1814 transitions. Word has length 91 [2021-08-27 04:46:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:46:46,364 INFO L470 AbstractCegarLoop]: Abstraction has 1608 states and 1814 transitions. [2021-08-27 04:46:46,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 45 states have internal predecessors, (170), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 1814 transitions. [2021-08-27 04:46:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-08-27 04:46:46,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:46:46,366 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 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] [2021-08-27 04:46:46,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 04:46:46,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:46,573 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:46:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:46:46,573 INFO L82 PathProgramCache]: Analyzing trace with hash 592464494, now seen corresponding path program 13 times [2021-08-27 04:46:46,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:46:46,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967838301] [2021-08-27 04:46:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:46:46,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:46:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:46,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:46:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:46,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:46:46,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967838301] [2021-08-27 04:46:46,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967838301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:46,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036925032] [2021-08-27 04:46:46,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:46:46,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:46,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:46:46,986 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:46:46,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 04:46:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:48,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-27 04:46:48,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:46:48,475 INFO L388 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 21 treesize of output 17 [2021-08-27 04:46:48,776 INFO L388 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 [2021-08-27 04:46:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:48,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036925032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:48,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:46:48,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 41 [2021-08-27 04:46:48,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463607000] [2021-08-27 04:46:48,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 04:46:48,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:46:48,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 04:46:48,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 04:46:48,790 INFO L87 Difference]: Start difference. First operand 1608 states and 1814 transitions. Second operand has 41 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:50,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:46:50,955 INFO L93 Difference]: Finished difference Result 2372 states and 2629 transitions. [2021-08-27 04:46:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 04:46:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-08-27 04:46:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:46:50,961 INFO L225 Difference]: With dead ends: 2372 [2021-08-27 04:46:50,961 INFO L226 Difference]: Without dead ends: 2046 [2021-08-27 04:46:50,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 790.8ms TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2021-08-27 04:46:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-08-27 04:46:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1876. [2021-08-27 04:46:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1857 states have (on average 1.1313947226709746) internal successors, (2101), 1861 states have internal predecessors, (2101), 13 states have call successors, (13), 13 states have call predecessors, (13), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2115 transitions. [2021-08-27 04:46:50,982 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2115 transitions. Word has length 101 [2021-08-27 04:46:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:46:50,982 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 2115 transitions. [2021-08-27 04:46:50,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2115 transitions. [2021-08-27 04:46:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-27 04:46:50,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:46:50,984 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-08-27 04:46:51,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-27 04:46:51,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:51,204 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:46:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:46:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash 336770012, now seen corresponding path program 8 times [2021-08-27 04:46:51,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:46:51,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049423052] [2021-08-27 04:46:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:46:51,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:46:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:51,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:46:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:51,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:46:51,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049423052] [2021-08-27 04:46:51,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049423052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:51,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084978585] [2021-08-27 04:46:51,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:46:51,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:51,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:46:51,772 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:46:51,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-27 04:46:53,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:46:53,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:46:53,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-27 04:46:53,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:46:53,059 INFO L388 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 [2021-08-27 04:46:53,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:46:53,439 INFO L388 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 31 treesize of output 30 [2021-08-27 04:46:56,182 INFO L354 Elim1Store]: treesize reduction 129, result has 5.8 percent of original size [2021-08-27 04:46:56,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 37 [2021-08-27 04:46:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:56,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084978585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:56,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:46:56,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-08-27 04:46:56,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900061842] [2021-08-27 04:46:56,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-27 04:46:56,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:46:56,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-27 04:46:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2522, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 04:46:56,247 INFO L87 Difference]: Start difference. First operand 1876 states and 2115 transitions. Second operand has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:47:00,529 INFO L93 Difference]: Finished difference Result 4495 states and 5035 transitions. [2021-08-27 04:47:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 04:47:00,530 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-08-27 04:47:00,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:47:00,538 INFO L225 Difference]: With dead ends: 4495 [2021-08-27 04:47:00,538 INFO L226 Difference]: Without dead ends: 4413 [2021-08-27 04:47:00,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 2917.5ms TimeCoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2021-08-27 04:47:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2021-08-27 04:47:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 2901. [2021-08-27 04:47:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2875 states have (on average 1.1255652173913044) internal successors, (3236), 2879 states have internal predecessors, (3236), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 3257 transitions. [2021-08-27 04:47:00,564 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 3257 transitions. Word has length 102 [2021-08-27 04:47:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:47:00,565 INFO L470 AbstractCegarLoop]: Abstraction has 2901 states and 3257 transitions. [2021-08-27 04:47:00,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 3257 transitions. [2021-08-27 04:47:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-27 04:47:00,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:47:00,568 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2021-08-27 04:47:00,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-27 04:47:00,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:47:00,785 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:47:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:47:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1057836879, now seen corresponding path program 14 times [2021-08-27 04:47:00,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:47:00,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936017360] [2021-08-27 04:47:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:47:00,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:47:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:01,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:47:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:47:01,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:47:01,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936017360] [2021-08-27 04:47:01,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936017360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:01,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216538567] [2021-08-27 04:47:01,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:47:01,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:47:01,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:47:01,182 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:47:01,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-27 04:47:02,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:47:02,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:47:02,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-27 04:47:02,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:47:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:47:03,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216538567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:03,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:47:03,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 38 [2021-08-27 04:47:03,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976243485] [2021-08-27 04:47:03,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 04:47:03,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:47:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 04:47:03,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1304, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 04:47:03,384 INFO L87 Difference]: Start difference. First operand 2901 states and 3257 transitions. Second operand has 39 states, 36 states have (on average 4.305555555555555) internal successors, (155), 36 states have internal predecessors, (155), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:47:04,915 INFO L93 Difference]: Finished difference Result 3470 states and 3847 transitions. [2021-08-27 04:47:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 04:47:04,916 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 4.305555555555555) internal successors, (155), 36 states have internal predecessors, (155), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-08-27 04:47:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:47:04,922 INFO L225 Difference]: With dead ends: 3470 [2021-08-27 04:47:04,922 INFO L226 Difference]: Without dead ends: 3468 [2021-08-27 04:47:04,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 764.6ms TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 04:47:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2021-08-27 04:47:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 2973. [2021-08-27 04:47:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2947 states have (on average 1.1262300644723449) internal successors, (3319), 2951 states have internal predecessors, (3319), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3340 transitions. [2021-08-27 04:47:04,949 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3340 transitions. Word has length 105 [2021-08-27 04:47:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:47:04,949 INFO L470 AbstractCegarLoop]: Abstraction has 2973 states and 3340 transitions. [2021-08-27 04:47:04,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 4.305555555555555) internal successors, (155), 36 states have internal predecessors, (155), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3340 transitions. [2021-08-27 04:47:04,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-27 04:47:04,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:47:04,953 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:47:04,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-27 04:47:05,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-27 04:47:05,174 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:47:05,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:47:05,174 INFO L82 PathProgramCache]: Analyzing trace with hash 376729913, now seen corresponding path program 9 times [2021-08-27 04:47:05,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:47:05,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782326868] [2021-08-27 04:47:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:47:05,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:47:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:05,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:47:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 15 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:47:05,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:47:05,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782326868] [2021-08-27 04:47:05,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782326868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:05,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995941478] [2021-08-27 04:47:05,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:47:05,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:47:05,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:47:05,403 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:47:05,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-27 04:47:07,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-27 04:47:07,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:47:07,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:47:07,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:47:07,064 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:47:07,064 INFO L388 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 18 treesize of output 19 [2021-08-27 04:47:07,066 INFO L388 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 13 [2021-08-27 04:47:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 28 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:47:07,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995941478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:07,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:47:07,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-27 04:47:07,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95064677] [2021-08-27 04:47:07,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:47:07,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:47:07,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:47:07,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:47:07,953 INFO L87 Difference]: Start difference. First operand 2973 states and 3340 transitions. Second operand has 31 states, 30 states have (on average 6.666666666666667) internal successors, (200), 28 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:47:09,331 INFO L93 Difference]: Finished difference Result 4867 states and 5463 transitions. [2021-08-27 04:47:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:47:09,331 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 6.666666666666667) internal successors, (200), 28 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-08-27 04:47:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:47:09,341 INFO L225 Difference]: With dead ends: 4867 [2021-08-27 04:47:09,341 INFO L226 Difference]: Without dead ends: 4867 [2021-08-27 04:47:09,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 743.3ms TimeCoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:47:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4867 states. [2021-08-27 04:47:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4867 to 3258. [2021-08-27 04:47:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3232 states have (on average 1.1259282178217822) internal successors, (3639), 3236 states have internal predecessors, (3639), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 3660 transitions. [2021-08-27 04:47:09,370 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 3660 transitions. Word has length 106 [2021-08-27 04:47:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:47:09,370 INFO L470 AbstractCegarLoop]: Abstraction has 3258 states and 3660 transitions. [2021-08-27 04:47:09,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 6.666666666666667) internal successors, (200), 28 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 3660 transitions. [2021-08-27 04:47:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-27 04:47:09,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:47:09,374 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2021-08-27 04:47:09,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-27 04:47:09,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-27 04:47:09,596 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:47:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:47:09,596 INFO L82 PathProgramCache]: Analyzing trace with hash -612517691, now seen corresponding path program 15 times [2021-08-27 04:47:09,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:47:09,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785997328] [2021-08-27 04:47:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:47:09,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:47:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:10,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:47:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:47:10,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:47:10,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785997328] [2021-08-27 04:47:10,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785997328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:10,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731290771] [2021-08-27 04:47:10,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:47:10,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:47:10,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:47:10,092 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:47:10,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-27 04:47:11,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-27 04:47:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:47:11,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-27 04:47:11,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:47:12,291 INFO L388 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 21 treesize of output 17 [2021-08-27 04:47:12,711 INFO L388 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 [2021-08-27 04:47:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:47:12,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731290771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:12,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:47:12,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 44 [2021-08-27 04:47:12,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038864745] [2021-08-27 04:47:12,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-27 04:47:12,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:47:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-27 04:47:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:47:12,725 INFO L87 Difference]: Start difference. First operand 3258 states and 3660 transitions. Second operand has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:47:15,494 INFO L93 Difference]: Finished difference Result 4523 states and 5014 transitions. [2021-08-27 04:47:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 04:47:15,495 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-08-27 04:47:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:47:15,500 INFO L225 Difference]: With dead ends: 4523 [2021-08-27 04:47:15,501 INFO L226 Difference]: Without dead ends: 4146 [2021-08-27 04:47:15,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1231.0ms TimeCoverageRelationStatistics Valid=276, Invalid=3384, Unknown=0, NotChecked=0, Total=3660 [2021-08-27 04:47:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2021-08-27 04:47:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 3807. [2021-08-27 04:47:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3779 states have (on average 1.1256946282085207) internal successors, (4254), 3783 states have internal predecessors, (4254), 22 states have call successors, (22), 22 states have call predecessors, (22), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 4277 transitions. [2021-08-27 04:47:15,529 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 4277 transitions. Word has length 111 [2021-08-27 04:47:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:47:15,529 INFO L470 AbstractCegarLoop]: Abstraction has 3807 states and 4277 transitions. [2021-08-27 04:47:15,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 4277 transitions. [2021-08-27 04:47:15,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-27 04:47:15,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:47:15,534 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:47:15,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-27 04:47:15,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-27 04:47:15,757 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:47:15,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:47:15,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1639319973, now seen corresponding path program 2 times [2021-08-27 04:47:15,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:47:15,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594514323] [2021-08-27 04:47:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:47:15,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:47:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:16,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:47:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 04:47:16,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:47:16,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594514323] [2021-08-27 04:47:16,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594514323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:16,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660420907] [2021-08-27 04:47:16,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:47:16,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:47:16,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:47:16,025 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:47:16,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-27 04:47:17,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:47:17,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:47:17,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-27 04:47:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:47:17,766 INFO L388 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 [2021-08-27 04:47:17,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:47:18,026 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:47:18,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 04:47:19,271 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:47:19,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-08-27 04:47:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 04:47:19,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660420907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:19,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:47:19,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-27 04:47:19,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682128899] [2021-08-27 04:47:19,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 04:47:19,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:47:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 04:47:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:47:19,320 INFO L87 Difference]: Start difference. First operand 3807 states and 4277 transitions. Second operand has 33 states, 32 states have (on average 5.625) internal successors, (180), 30 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:47:45,646 INFO L93 Difference]: Finished difference Result 5010 states and 5612 transitions. [2021-08-27 04:47:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 04:47:45,646 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.625) internal successors, (180), 30 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-08-27 04:47:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:47:45,650 INFO L225 Difference]: With dead ends: 5010 [2021-08-27 04:47:45,650 INFO L226 Difference]: Without dead ends: 3110 [2021-08-27 04:47:45,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 25025.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:47:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-08-27 04:47:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2572. [2021-08-27 04:47:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2552 states have (on average 1.130485893416928) internal successors, (2885), 2556 states have internal predecessors, (2885), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 2900 transitions. [2021-08-27 04:47:45,669 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 2900 transitions. Word has length 112 [2021-08-27 04:47:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:47:45,669 INFO L470 AbstractCegarLoop]: Abstraction has 2572 states and 2900 transitions. [2021-08-27 04:47:45,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.625) internal successors, (180), 30 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 2900 transitions. [2021-08-27 04:47:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-27 04:47:45,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:47:45,671 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-08-27 04:47:45,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-27 04:47:45,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:47:45,893 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:47:45,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:47:45,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1840473928, now seen corresponding path program 16 times [2021-08-27 04:47:45,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:47:45,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942749368] [2021-08-27 04:47:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:47:45,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:47:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:46,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:47:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:47:46,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:47:46,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942749368] [2021-08-27 04:47:46,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942749368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:46,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585567623] [2021-08-27 04:47:46,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:47:46,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:47:46,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:47:46,328 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:47:46,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-27 04:47:48,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:47:48,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:47:48,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 69 conjunts are in the unsatisfiable core [2021-08-27 04:47:48,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:47:48,150 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:47:48,150 INFO L388 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 9 treesize of output 15 [2021-08-27 04:47:48,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:47:49,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:47:49,463 INFO L388 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 19 treesize of output 19 [2021-08-27 04:47:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 128 proven. 250 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:47:49,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585567623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:49,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:47:49,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 45 [2021-08-27 04:47:49,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802026231] [2021-08-27 04:47:49,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-27 04:47:49,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:47:49,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-27 04:47:49,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1925, Unknown=0, NotChecked=0, Total=2070 [2021-08-27 04:47:49,700 INFO L87 Difference]: Start difference. First operand 2572 states and 2900 transitions. Second operand has 46 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:47:54,162 INFO L93 Difference]: Finished difference Result 3306 states and 3649 transitions. [2021-08-27 04:47:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-27 04:47:54,162 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-08-27 04:47:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:47:54,166 INFO L225 Difference]: With dead ends: 3306 [2021-08-27 04:47:54,166 INFO L226 Difference]: Without dead ends: 3304 [2021-08-27 04:47:54,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 2208.5ms TimeCoverageRelationStatistics Valid=467, Invalid=4935, Unknown=0, NotChecked=0, Total=5402 [2021-08-27 04:47:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-08-27 04:47:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 2632. [2021-08-27 04:47:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2612 states have (on average 1.1309341500765697) internal successors, (2954), 2616 states have internal predecessors, (2954), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 2969 transitions. [2021-08-27 04:47:54,189 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 2969 transitions. Word has length 115 [2021-08-27 04:47:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:47:54,189 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 2969 transitions. [2021-08-27 04:47:54,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 2969 transitions. [2021-08-27 04:47:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-08-27 04:47:54,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:47:54,192 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:47:54,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-27 04:47:54,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-27 04:47:54,414 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:47:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:47:54,414 INFO L82 PathProgramCache]: Analyzing trace with hash -231121630, now seen corresponding path program 10 times [2021-08-27 04:47:54,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:47:54,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801042288] [2021-08-27 04:47:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:47:54,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:47:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:55,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:47:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:47:55,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:47:55,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801042288] [2021-08-27 04:47:55,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801042288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:55,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665327584] [2021-08-27 04:47:55,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:47:55,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:47:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:47:55,028 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:47:55,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-27 04:47:57,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:47:57,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:47:57,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 85 conjunts are in the unsatisfiable core [2021-08-27 04:47:57,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:47:57,037 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:47:57,037 INFO L388 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 9 treesize of output 15 [2021-08-27 04:47:57,048 INFO L388 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 [2021-08-27 04:47:57,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-27 04:47:57,907 INFO L388 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 28 treesize of output 27 [2021-08-27 04:48:00,752 INFO L388 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 35 treesize of output 27 [2021-08-27 04:48:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 172 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:00,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665327584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:00,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:48:00,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 53 [2021-08-27 04:48:00,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850745780] [2021-08-27 04:48:00,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-27 04:48:00,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:48:00,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-27 04:48:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 04:48:00,919 INFO L87 Difference]: Start difference. First operand 2632 states and 2969 transitions. Second operand has 53 states, 52 states have (on average 4.3076923076923075) internal successors, (224), 50 states have internal predecessors, (224), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:48:15,721 INFO L93 Difference]: Finished difference Result 10112 states and 11252 transitions. [2021-08-27 04:48:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-08-27 04:48:15,721 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.3076923076923075) internal successors, (224), 50 states have internal predecessors, (224), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-08-27 04:48:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:48:15,743 INFO L225 Difference]: With dead ends: 10112 [2021-08-27 04:48:15,743 INFO L226 Difference]: Without dead ends: 9036 [2021-08-27 04:48:15,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9002 ImplicationChecksByTransitivity, 12915.6ms TimeCoverageRelationStatistics Valid=3229, Invalid=30811, Unknown=0, NotChecked=0, Total=34040 [2021-08-27 04:48:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2021-08-27 04:48:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 7309. [2021-08-27 04:48:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7309 states, 7281 states have (on average 1.126768301057547) internal successors, (8204), 7285 states have internal predecessors, (8204), 22 states have call successors, (22), 22 states have call predecessors, (22), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7309 states to 7309 states and 8227 transitions. [2021-08-27 04:48:15,869 INFO L78 Accepts]: Start accepts. Automaton has 7309 states and 8227 transitions. Word has length 119 [2021-08-27 04:48:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:48:15,869 INFO L470 AbstractCegarLoop]: Abstraction has 7309 states and 8227 transitions. [2021-08-27 04:48:15,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.3076923076923075) internal successors, (224), 50 states have internal predecessors, (224), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 7309 states and 8227 transitions. [2021-08-27 04:48:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-27 04:48:15,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:48:15,873 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 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] [2021-08-27 04:48:15,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-27 04:48:16,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-27 04:48:16,109 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:48:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:48:16,109 INFO L82 PathProgramCache]: Analyzing trace with hash -634723812, now seen corresponding path program 17 times [2021-08-27 04:48:16,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:48:16,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175943500] [2021-08-27 04:48:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:48:16,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:48:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:16,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:48:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:16,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:48:16,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175943500] [2021-08-27 04:48:16,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175943500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:16,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68778938] [2021-08-27 04:48:16,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:48:16,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:48:16,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:48:16,629 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:48:16,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-27 04:48:18,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-27 04:48:18,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:48:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 76 conjunts are in the unsatisfiable core [2021-08-27 04:48:18,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:48:19,352 INFO L388 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 21 treesize of output 17 [2021-08-27 04:48:19,850 INFO L388 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 [2021-08-27 04:48:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:19,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68778938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:19,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:48:19,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 47 [2021-08-27 04:48:19,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637099466] [2021-08-27 04:48:19,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-27 04:48:19,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:48:19,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-27 04:48:19,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2039, Unknown=0, NotChecked=0, Total=2162 [2021-08-27 04:48:19,864 INFO L87 Difference]: Start difference. First operand 7309 states and 8227 transitions. Second operand has 47 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:48:22,981 INFO L93 Difference]: Finished difference Result 9740 states and 10859 transitions. [2021-08-27 04:48:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 04:48:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-08-27 04:48:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:48:23,022 INFO L225 Difference]: With dead ends: 9740 [2021-08-27 04:48:23,022 INFO L226 Difference]: Without dead ends: 9294 [2021-08-27 04:48:23,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1320.4ms TimeCoverageRelationStatistics Valid=294, Invalid=3866, Unknown=0, NotChecked=0, Total=4160 [2021-08-27 04:48:23,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9294 states. [2021-08-27 04:48:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9294 to 8505. [2021-08-27 04:48:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8505 states, 8475 states have (on average 1.1269616519174042) internal successors, (9551), 8479 states have internal predecessors, (9551), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8505 states to 8505 states and 9576 transitions. [2021-08-27 04:48:23,236 INFO L78 Accepts]: Start accepts. Automaton has 8505 states and 9576 transitions. Word has length 121 [2021-08-27 04:48:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:48:23,237 INFO L470 AbstractCegarLoop]: Abstraction has 8505 states and 9576 transitions. [2021-08-27 04:48:23,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:23,238 INFO L276 IsEmpty]: Start isEmpty. Operand 8505 states and 9576 transitions. [2021-08-27 04:48:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-27 04:48:23,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:48:23,245 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:48:23,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-27 04:48:23,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-27 04:48:23,445 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:48:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:48:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash -85432987, now seen corresponding path program 11 times [2021-08-27 04:48:23,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:48:23,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689481048] [2021-08-27 04:48:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:48:23,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:48:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:23,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:48:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:23,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:48:23,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689481048] [2021-08-27 04:48:23,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689481048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:23,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123147953] [2021-08-27 04:48:23,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:48:23,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:48:23,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:48:23,737 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:48:23,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-27 04:48:26,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-27 04:48:26,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:48:26,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-27 04:48:26,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:48:26,068 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:48:26,068 INFO L388 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 18 treesize of output 19 [2021-08-27 04:48:26,070 INFO L388 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 13 [2021-08-27 04:48:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:27,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123147953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:27,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:48:27,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-27 04:48:27,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633093744] [2021-08-27 04:48:27,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:48:27,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:48:27,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:48:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:48:27,028 INFO L87 Difference]: Start difference. First operand 8505 states and 9576 transitions. Second operand has 31 states, 30 states have (on average 7.333333333333333) internal successors, (220), 29 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:48:28,711 INFO L93 Difference]: Finished difference Result 9376 states and 10524 transitions. [2021-08-27 04:48:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 04:48:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 7.333333333333333) internal successors, (220), 29 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-08-27 04:48:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:48:28,744 INFO L225 Difference]: With dead ends: 9376 [2021-08-27 04:48:28,745 INFO L226 Difference]: Without dead ends: 9376 [2021-08-27 04:48:28,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 609.9ms TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 04:48:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2021-08-27 04:48:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 8912. [2021-08-27 04:48:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8912 states, 8882 states have (on average 1.1268858365233057) internal successors, (10009), 8886 states have internal predecessors, (10009), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8912 states to 8912 states and 10034 transitions. [2021-08-27 04:48:28,968 INFO L78 Accepts]: Start accepts. Automaton has 8912 states and 10034 transitions. Word has length 123 [2021-08-27 04:48:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:48:28,969 INFO L470 AbstractCegarLoop]: Abstraction has 8912 states and 10034 transitions. [2021-08-27 04:48:28,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 7.333333333333333) internal successors, (220), 29 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 8912 states and 10034 transitions. [2021-08-27 04:48:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-27 04:48:28,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:48:28,987 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:48:29,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-27 04:48:29,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:48:29,188 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:48:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:48:29,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1868134177, now seen corresponding path program 18 times [2021-08-27 04:48:29,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:48:29,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463604610] [2021-08-27 04:48:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:48:29,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:48:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:29,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:48:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:29,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:48:29,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463604610] [2021-08-27 04:48:29,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463604610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:29,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105923103] [2021-08-27 04:48:29,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:48:29,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:48:29,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:48:29,925 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:48:29,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-27 04:48:32,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-27 04:48:32,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:48:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-27 04:48:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:48:32,443 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:48:32,444 INFO L388 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 9 treesize of output 15 [2021-08-27 04:48:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:33,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105923103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:33,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:48:33,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 54 [2021-08-27 04:48:33,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524849045] [2021-08-27 04:48:33,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-27 04:48:33,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:48:33,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-27 04:48:33,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2632, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 04:48:33,985 INFO L87 Difference]: Start difference. First operand 8912 states and 10034 transitions. Second operand has 55 states, 53 states have (on average 4.490566037735849) internal successors, (238), 52 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:48:36,276 INFO L93 Difference]: Finished difference Result 10266 states and 11454 transitions. [2021-08-27 04:48:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 04:48:36,276 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 4.490566037735849) internal successors, (238), 52 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-08-27 04:48:36,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:48:36,289 INFO L225 Difference]: With dead ends: 10266 [2021-08-27 04:48:36,289 INFO L226 Difference]: Without dead ends: 10264 [2021-08-27 04:48:36,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 1595.5ms TimeCoverageRelationStatistics Valid=562, Invalid=4130, Unknown=0, NotChecked=0, Total=4692 [2021-08-27 04:48:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10264 states. [2021-08-27 04:48:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10264 to 9056. [2021-08-27 04:48:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9056 states, 9026 states have (on average 1.127409705295812) internal successors, (10176), 9030 states have internal predecessors, (10176), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9056 states to 9056 states and 10201 transitions. [2021-08-27 04:48:36,402 INFO L78 Accepts]: Start accepts. Automaton has 9056 states and 10201 transitions. Word has length 125 [2021-08-27 04:48:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:48:36,403 INFO L470 AbstractCegarLoop]: Abstraction has 9056 states and 10201 transitions. [2021-08-27 04:48:36,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 4.490566037735849) internal successors, (238), 52 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 9056 states and 10201 transitions. [2021-08-27 04:48:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-08-27 04:48:36,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:48:36,408 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:48:36,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-27 04:48:36,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-27 04:48:36,621 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:48:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:48:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1672595853, now seen corresponding path program 19 times [2021-08-27 04:48:36,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:48:36,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803815003] [2021-08-27 04:48:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:48:36,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:48:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:37,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:48:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:37,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:48:37,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803815003] [2021-08-27 04:48:37,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803815003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:37,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807354394] [2021-08-27 04:48:37,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:48:37,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:48:37,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:48:37,169 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:48:37,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-27 04:48:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:39,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-27 04:48:39,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:48:39,994 INFO L388 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 21 treesize of output 17 [2021-08-27 04:48:40,462 INFO L388 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 [2021-08-27 04:48:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:40,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807354394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:40,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:48:40,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 50 [2021-08-27 04:48:40,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048472869] [2021-08-27 04:48:40,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-27 04:48:40,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:48:40,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-27 04:48:40,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2021-08-27 04:48:40,477 INFO L87 Difference]: Start difference. First operand 9056 states and 10201 transitions. Second operand has 50 states, 48 states have (on average 3.9375) internal successors, (189), 47 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:48:44,164 INFO L93 Difference]: Finished difference Result 11850 states and 13229 transitions. [2021-08-27 04:48:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 04:48:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 3.9375) internal successors, (189), 47 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-08-27 04:48:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:48:44,173 INFO L225 Difference]: With dead ends: 11850 [2021-08-27 04:48:44,174 INFO L226 Difference]: Without dead ends: 11362 [2021-08-27 04:48:44,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1408.6ms TimeCoverageRelationStatistics Valid=312, Invalid=4380, Unknown=0, NotChecked=0, Total=4692 [2021-08-27 04:48:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11362 states. [2021-08-27 04:48:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11362 to 10427. [2021-08-27 04:48:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10427 states, 10395 states have (on average 1.127946127946128) internal successors, (11725), 10399 states have internal predecessors, (11725), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10427 states to 10427 states and 11752 transitions. [2021-08-27 04:48:44,246 INFO L78 Accepts]: Start accepts. Automaton has 10427 states and 11752 transitions. Word has length 131 [2021-08-27 04:48:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:48:44,246 INFO L470 AbstractCegarLoop]: Abstraction has 10427 states and 11752 transitions. [2021-08-27 04:48:44,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 3.9375) internal successors, (189), 47 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10427 states and 11752 transitions. [2021-08-27 04:48:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-27 04:48:44,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:48:44,252 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2021-08-27 04:48:44,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-27 04:48:44,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:48:44,473 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:48:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:48:44,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1797686646, now seen corresponding path program 20 times [2021-08-27 04:48:44,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:48:44,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863034337] [2021-08-27 04:48:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:48:44,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:48:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:45,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:48:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 153 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:45,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:48:45,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863034337] [2021-08-27 04:48:45,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863034337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:45,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157107876] [2021-08-27 04:48:45,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:48:45,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:48:45,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:48:45,032 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:48:45,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-27 04:48:47,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:48:47,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:48:47,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-27 04:48:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:48:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 190 proven. 382 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:48:48,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157107876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:48,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:48:48,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 47 [2021-08-27 04:48:48,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359032460] [2021-08-27 04:48:48,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-27 04:48:48,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:48:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-27 04:48:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:48:48,555 INFO L87 Difference]: Start difference. First operand 10427 states and 11752 transitions. Second operand has 48 states, 45 states have (on average 4.377777777777778) internal successors, (197), 45 states have internal predecessors, (197), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:48:50,983 INFO L93 Difference]: Finished difference Result 11896 states and 13289 transitions. [2021-08-27 04:48:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 04:48:50,983 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 4.377777777777778) internal successors, (197), 45 states have internal predecessors, (197), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-08-27 04:48:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:48:50,991 INFO L225 Difference]: With dead ends: 11896 [2021-08-27 04:48:50,991 INFO L226 Difference]: Without dead ends: 11894 [2021-08-27 04:48:50,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1132.3ms TimeCoverageRelationStatistics Valid=443, Invalid=3463, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 04:48:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11894 states. [2021-08-27 04:48:51,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11894 to 10571. [2021-08-27 04:48:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10539 states have (on average 1.1283803017364076) internal successors, (11892), 10543 states have internal predecessors, (11892), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 11919 transitions. [2021-08-27 04:48:51,068 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 11919 transitions. Word has length 135 [2021-08-27 04:48:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:48:51,069 INFO L470 AbstractCegarLoop]: Abstraction has 10571 states and 11919 transitions. [2021-08-27 04:48:51,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 4.377777777777778) internal successors, (197), 45 states have internal predecessors, (197), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:48:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 11919 transitions. [2021-08-27 04:48:51,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-27 04:48:51,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:48:51,075 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:48:51,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-27 04:48:51,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-27 04:48:51,301 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:48:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:48:51,301 INFO L82 PathProgramCache]: Analyzing trace with hash 217606373, now seen corresponding path program 3 times [2021-08-27 04:48:51,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:48:51,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581366966] [2021-08-27 04:48:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:48:51,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:48:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:51,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:48:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:48:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 103 proven. 209 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-27 04:48:51,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:48:51,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581366966] [2021-08-27 04:48:51,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581366966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:51,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534934949] [2021-08-27 04:48:51,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:48:51,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:48:51,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:48:51,640 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:48:51,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-27 04:48:54,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-27 04:48:54,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:48:54,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-27 04:48:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:48:54,440 INFO L388 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 [2021-08-27 04:48:54,445 INFO L388 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 9 treesize of output 11 [2021-08-27 04:48:54,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 04:48:54,903 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:48:54,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-08-27 04:48:57,137 INFO L354 Elim1Store]: treesize reduction 42, result has 57.6 percent of original size [2021-08-27 04:48:57,137 INFO L388 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 57 treesize of output 83 [2021-08-27 04:48:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 87 proven. 16 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-08-27 04:48:57,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534934949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:48:57,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:48:57,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 33 [2021-08-27 04:48:57,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999947789] [2021-08-27 04:48:57,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 04:48:57,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:48:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 04:48:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:48:57,285 INFO L87 Difference]: Start difference. First operand 10571 states and 11919 transitions. Second operand has 33 states, 32 states have (on average 5.15625) internal successors, (165), 30 states have internal predecessors, (165), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:52:21,086 INFO L93 Difference]: Finished difference Result 9571 states and 10647 transitions. [2021-08-27 04:52:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-27 04:52:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.15625) internal successors, (165), 30 states have internal predecessors, (165), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-08-27 04:52:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:52:21,089 INFO L225 Difference]: With dead ends: 9571 [2021-08-27 04:52:21,089 INFO L226 Difference]: Without dead ends: 2522 [2021-08-27 04:52:21,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3924 ImplicationChecksByTransitivity, 195285.5ms TimeCoverageRelationStatistics Valid=1216, Invalid=14035, Unknown=1, NotChecked=0, Total=15252 [2021-08-27 04:52:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-08-27 04:52:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 801. [2021-08-27 04:52:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 790 states have (on average 1.1265822784810127) internal successors, (890), 792 states have internal predecessors, (890), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 898 transitions. [2021-08-27 04:52:21,099 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 898 transitions. Word has length 135 [2021-08-27 04:52:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:52:21,120 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 898 transitions. [2021-08-27 04:52:21,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.15625) internal successors, (165), 30 states have internal predecessors, (165), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 898 transitions. [2021-08-27 04:52:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-08-27 04:52:21,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:52:21,122 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 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] [2021-08-27 04:52:21,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-27 04:52:21,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:52:21,323 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:52:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:52:21,323 INFO L82 PathProgramCache]: Analyzing trace with hash 833496522, now seen corresponding path program 21 times [2021-08-27 04:52:21,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:52:21,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413901025] [2021-08-27 04:52:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:52:21,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:52:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:52:21,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:52:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:52:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:52:21,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:52:21,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413901025] [2021-08-27 04:52:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413901025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:52:21,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190748422] [2021-08-27 04:52:21,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:52:21,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:52:21,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:52:21,960 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:52:21,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-27 04:52:24,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-27 04:52:24,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:52:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-27 04:52:24,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:52:25,504 INFO L388 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 21 treesize of output 17 [2021-08-27 04:52:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:52:26,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190748422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:52:26,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:52:26,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 55 [2021-08-27 04:52:26,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65194968] [2021-08-27 04:52:26,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-27 04:52:26,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:52:26,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-27 04:52:26,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2823, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 04:52:26,115 INFO L87 Difference]: Start difference. First operand 801 states and 898 transitions. Second operand has 55 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:52:30,363 INFO L93 Difference]: Finished difference Result 1567 states and 1718 transitions. [2021-08-27 04:52:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-27 04:52:30,363 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2021-08-27 04:52:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:52:30,364 INFO L225 Difference]: With dead ends: 1567 [2021-08-27 04:52:30,364 INFO L226 Difference]: Without dead ends: 836 [2021-08-27 04:52:30,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1744.7ms TimeCoverageRelationStatistics Valid=341, Invalid=5209, Unknown=0, NotChecked=0, Total=5550 [2021-08-27 04:52:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-08-27 04:52:30,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 821. [2021-08-27 04:52:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 810 states have (on average 1.123456790123457) internal successors, (910), 812 states have internal predecessors, (910), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 918 transitions. [2021-08-27 04:52:30,370 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 918 transitions. Word has length 141 [2021-08-27 04:52:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:52:30,370 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 918 transitions. [2021-08-27 04:52:30,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 918 transitions. [2021-08-27 04:52:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-08-27 04:52:30,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:52:30,371 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2021-08-27 04:52:30,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-27 04:52:30,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-27 04:52:30,590 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:52:30,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:52:30,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1537356531, now seen corresponding path program 22 times [2021-08-27 04:52:30,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:52:30,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165049189] [2021-08-27 04:52:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:52:30,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:52:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:52:31,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:52:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:52:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:52:31,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:52:31,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165049189] [2021-08-27 04:52:31,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165049189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:52:31,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725128062] [2021-08-27 04:52:31,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:52:31,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:52:31,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:52:31,195 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:52:31,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-27 04:52:34,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:52:34,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:52:34,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-27 04:52:34,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:52:34,094 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:52:34,094 INFO L388 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 9 treesize of output 15 [2021-08-27 04:52:34,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:52:36,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:52:36,235 INFO L388 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 19 treesize of output 19 [2021-08-27 04:52:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 242 proven. 442 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:52:36,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725128062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:52:36,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:52:36,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35] total 54 [2021-08-27 04:52:36,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550232567] [2021-08-27 04:52:36,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-27 04:52:36,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:52:36,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-27 04:52:36,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2774, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 04:52:36,528 INFO L87 Difference]: Start difference. First operand 821 states and 918 transitions. Second operand has 55 states, 52 states have (on average 4.461538461538462) internal successors, (232), 52 states have internal predecessors, (232), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:52:41,030 INFO L93 Difference]: Finished difference Result 1179 states and 1287 transitions. [2021-08-27 04:52:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 04:52:41,031 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 4.461538461538462) internal successors, (232), 52 states have internal predecessors, (232), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-08-27 04:52:41,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:52:41,032 INFO L225 Difference]: With dead ends: 1179 [2021-08-27 04:52:41,032 INFO L226 Difference]: Without dead ends: 1177 [2021-08-27 04:52:41,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 2501.1ms TimeCoverageRelationStatistics Valid=430, Invalid=4972, Unknown=0, NotChecked=0, Total=5402 [2021-08-27 04:52:41,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-08-27 04:52:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 857. [2021-08-27 04:52:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 846 states have (on average 1.124113475177305) internal successors, (951), 848 states have internal predecessors, (951), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 959 transitions. [2021-08-27 04:52:41,040 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 959 transitions. Word has length 145 [2021-08-27 04:52:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:52:41,040 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 959 transitions. [2021-08-27 04:52:41,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 4.461538461538462) internal successors, (232), 52 states have internal predecessors, (232), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 959 transitions. [2021-08-27 04:52:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-08-27 04:52:41,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:52:41,042 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 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] [2021-08-27 04:52:41,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-27 04:52:41,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-27 04:52:41,265 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:52:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:52:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1944133665, now seen corresponding path program 23 times [2021-08-27 04:52:41,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:52:41,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655839846] [2021-08-27 04:52:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:52:41,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:52:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:52:41,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:52:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:52:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:52:41,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:52:41,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655839846] [2021-08-27 04:52:41,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655839846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:52:41,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623605685] [2021-08-27 04:52:41,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:52:41,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:52:41,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:52:41,950 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:52:41,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-27 04:52:45,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-27 04:52:45,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:52:45,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-27 04:52:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:52:45,110 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:52:45,111 INFO L388 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 9 treesize of output 15 [2021-08-27 04:52:46,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:52:47,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:52:47,819 INFO L388 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 19 treesize of output 19 [2021-08-27 04:52:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:52:48,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623605685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:52:48,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:52:48,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35] total 71 [2021-08-27 04:52:48,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841782071] [2021-08-27 04:52:48,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-27 04:52:48,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:52:48,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-27 04:52:48,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=4718, Unknown=0, NotChecked=0, Total=4970 [2021-08-27 04:52:48,124 INFO L87 Difference]: Start difference. First operand 857 states and 959 transitions. Second operand has 71 states, 69 states have (on average 4.202898550724638) internal successors, (290), 68 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:52:54,184 INFO L93 Difference]: Finished difference Result 2067 states and 2239 transitions. [2021-08-27 04:52:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-27 04:52:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 69 states have (on average 4.202898550724638) internal successors, (290), 68 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-08-27 04:52:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:52:54,186 INFO L225 Difference]: With dead ends: 2067 [2021-08-27 04:52:54,186 INFO L226 Difference]: Without dead ends: 1273 [2021-08-27 04:52:54,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 4304.8ms TimeCoverageRelationStatistics Valid=930, Invalid=15072, Unknown=0, NotChecked=0, Total=16002 [2021-08-27 04:52:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-08-27 04:52:54,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 913. [2021-08-27 04:52:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 902 states have (on average 1.1219512195121952) internal successors, (1012), 904 states have internal predecessors, (1012), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1020 transitions. [2021-08-27 04:52:54,195 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1020 transitions. Word has length 151 [2021-08-27 04:52:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:52:54,195 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1020 transitions. [2021-08-27 04:52:54,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 69 states have (on average 4.202898550724638) internal successors, (290), 68 states have internal predecessors, (290), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:52:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1020 transitions. [2021-08-27 04:52:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-08-27 04:52:54,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:52:54,197 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 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] [2021-08-27 04:52:54,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-27 04:52:54,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-27 04:52:54,413 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:52:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:52:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1028494712, now seen corresponding path program 24 times [2021-08-27 04:52:54,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:52:54,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891334782] [2021-08-27 04:52:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:52:54,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:52:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:52:55,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:52:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:52:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:52:55,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:52:55,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891334782] [2021-08-27 04:52:55,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891334782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:52:55,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324613423] [2021-08-27 04:52:55,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:52:55,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:52:55,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:52:55,075 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:52:55,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-27 04:52:58,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-27 04:52:58,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:52:58,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-27 04:52:58,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:52:58,752 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:52:58,753 INFO L388 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 9 treesize of output 15 [2021-08-27 04:52:59,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:53:01,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:53:01,856 INFO L388 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 28 treesize of output 28 [2021-08-27 04:53:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 521 proven. 364 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:02,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324613423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:02,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:53:02,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 75 [2021-08-27 04:53:02,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431101673] [2021-08-27 04:53:02,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-27 04:53:02,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:53:02,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-27 04:53:02,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=5186, Unknown=0, NotChecked=0, Total=5550 [2021-08-27 04:53:02,084 INFO L87 Difference]: Start difference. First operand 913 states and 1020 transitions. Second operand has 75 states, 73 states have (on average 4.205479452054795) internal successors, (307), 72 states have internal predecessors, (307), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:53:07,604 INFO L93 Difference]: Finished difference Result 1801 states and 1972 transitions. [2021-08-27 04:53:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-27 04:53:07,604 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 4.205479452054795) internal successors, (307), 72 states have internal predecessors, (307), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-08-27 04:53:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:53:07,605 INFO L225 Difference]: With dead ends: 1801 [2021-08-27 04:53:07,605 INFO L226 Difference]: Without dead ends: 948 [2021-08-27 04:53:07,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 3720.3ms TimeCoverageRelationStatistics Valid=912, Invalid=11520, Unknown=0, NotChecked=0, Total=12432 [2021-08-27 04:53:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-08-27 04:53:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 933. [2021-08-27 04:53:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 922 states have (on average 1.119305856832972) internal successors, (1032), 924 states have internal predecessors, (1032), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1040 transitions. [2021-08-27 04:53:07,611 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1040 transitions. Word has length 161 [2021-08-27 04:53:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:53:07,611 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 1040 transitions. [2021-08-27 04:53:07,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 4.205479452054795) internal successors, (307), 72 states have internal predecessors, (307), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1040 transitions. [2021-08-27 04:53:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-08-27 04:53:07,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:53:07,613 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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] [2021-08-27 04:53:07,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-27 04:53:07,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-27 04:53:07,833 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:53:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:53:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1767113413, now seen corresponding path program 25 times [2021-08-27 04:53:07,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:53:07,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657707680] [2021-08-27 04:53:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:53:07,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:53:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:08,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:53:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:08,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:53:08,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657707680] [2021-08-27 04:53:08,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657707680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:08,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653054009] [2021-08-27 04:53:08,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:53:08,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:53:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:53:08,583 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:53:08,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-27 04:53:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 85 conjunts are in the unsatisfiable core [2021-08-27 04:53:11,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:53:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:13,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653054009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:13,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:53:13,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 56 [2021-08-27 04:53:13,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897529353] [2021-08-27 04:53:13,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-27 04:53:13,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:53:13,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-27 04:53:13,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2783, Unknown=0, NotChecked=0, Total=3192 [2021-08-27 04:53:13,270 INFO L87 Difference]: Start difference. First operand 933 states and 1040 transitions. Second operand has 57 states, 54 states have (on average 4.425925925925926) internal successors, (239), 54 states have internal predecessors, (239), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:53:16,713 INFO L93 Difference]: Finished difference Result 1341 states and 1459 transitions. [2021-08-27 04:53:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-27 04:53:16,714 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 4.425925925925926) internal successors, (239), 54 states have internal predecessors, (239), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-08-27 04:53:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:53:16,715 INFO L225 Difference]: With dead ends: 1341 [2021-08-27 04:53:16,715 INFO L226 Difference]: Without dead ends: 1339 [2021-08-27 04:53:16,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1565.8ms TimeCoverageRelationStatistics Valid=608, Invalid=4942, Unknown=0, NotChecked=0, Total=5550 [2021-08-27 04:53:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-08-27 04:53:16,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 969. [2021-08-27 04:53:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 958 states have (on average 1.1200417536534446) internal successors, (1073), 960 states have internal predecessors, (1073), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1081 transitions. [2021-08-27 04:53:16,723 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1081 transitions. Word has length 165 [2021-08-27 04:53:16,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:53:16,723 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1081 transitions. [2021-08-27 04:53:16,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 4.425925925925926) internal successors, (239), 54 states have internal predecessors, (239), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1081 transitions. [2021-08-27 04:53:16,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-08-27 04:53:16,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:53:16,725 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 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] [2021-08-27 04:53:16,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-27 04:53:16,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-27 04:53:16,939 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:53:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:53:16,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1607862833, now seen corresponding path program 26 times [2021-08-27 04:53:16,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:53:16,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088697690] [2021-08-27 04:53:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:53:16,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:53:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:17,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:53:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:17,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:53:17,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088697690] [2021-08-27 04:53:17,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088697690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:17,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348335387] [2021-08-27 04:53:17,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:53:17,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:53:17,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:53:17,736 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:53:17,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-27 04:53:21,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:53:21,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:53:21,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-27 04:53:21,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:53:22,016 INFO L388 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 21 treesize of output 17 [2021-08-27 04:53:22,608 INFO L388 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 [2021-08-27 04:53:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:22,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348335387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:22,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:53:22,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39] total 62 [2021-08-27 04:53:22,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096723150] [2021-08-27 04:53:22,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-27 04:53:22,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:53:22,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-27 04:53:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3619, Unknown=0, NotChecked=0, Total=3782 [2021-08-27 04:53:22,624 INFO L87 Difference]: Start difference. First operand 969 states and 1081 transitions. Second operand has 62 states, 60 states have (on average 4.083333333333333) internal successors, (245), 59 states have internal predecessors, (245), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:53:27,696 INFO L93 Difference]: Finished difference Result 1918 states and 2099 transitions. [2021-08-27 04:53:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-27 04:53:27,696 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 4.083333333333333) internal successors, (245), 59 states have internal predecessors, (245), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-08-27 04:53:27,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:53:27,697 INFO L225 Difference]: With dead ends: 1918 [2021-08-27 04:53:27,697 INFO L226 Difference]: Without dead ends: 1004 [2021-08-27 04:53:27,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 2151.7ms TimeCoverageRelationStatistics Valid=384, Invalid=6756, Unknown=0, NotChecked=0, Total=7140 [2021-08-27 04:53:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-08-27 04:53:27,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 989. [2021-08-27 04:53:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 978 states have (on average 1.1175869120654396) internal successors, (1093), 980 states have internal predecessors, (1093), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1101 transitions. [2021-08-27 04:53:27,703 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1101 transitions. Word has length 171 [2021-08-27 04:53:27,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:53:27,703 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1101 transitions. [2021-08-27 04:53:27,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 4.083333333333333) internal successors, (245), 59 states have internal predecessors, (245), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1101 transitions. [2021-08-27 04:53:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-08-27 04:53:27,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:53:27,705 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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] [2021-08-27 04:53:27,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-27 04:53:27,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:53:27,925 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:53:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:53:27,925 INFO L82 PathProgramCache]: Analyzing trace with hash -903363118, now seen corresponding path program 27 times [2021-08-27 04:53:27,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:53:27,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537904168] [2021-08-27 04:53:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:53:27,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:53:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:28,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:53:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 325 proven. 755 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:28,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:53:28,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537904168] [2021-08-27 04:53:28,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537904168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:28,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041049303] [2021-08-27 04:53:28,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:53:28,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:53:28,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:53:28,809 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:53:28,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-27 04:53:32,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-27 04:53:32,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:53:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-27 04:53:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:53:32,474 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:53:32,475 INFO L388 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 9 treesize of output 15 [2021-08-27 04:53:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:34,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041049303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:34,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:53:34,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 74 [2021-08-27 04:53:34,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214366900] [2021-08-27 04:53:34,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-27 04:53:34,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:53:34,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-27 04:53:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=4912, Unknown=0, NotChecked=0, Total=5550 [2021-08-27 04:53:34,456 INFO L87 Difference]: Start difference. First operand 989 states and 1101 transitions. Second operand has 75 states, 73 states have (on average 4.63013698630137) internal successors, (338), 72 states have internal predecessors, (338), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:53:38,028 INFO L93 Difference]: Finished difference Result 1422 states and 1545 transitions. [2021-08-27 04:53:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-27 04:53:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 4.63013698630137) internal successors, (338), 72 states have internal predecessors, (338), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-08-27 04:53:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:53:38,030 INFO L225 Difference]: With dead ends: 1422 [2021-08-27 04:53:38,030 INFO L226 Difference]: Without dead ends: 1420 [2021-08-27 04:53:38,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2607 ImplicationChecksByTransitivity, 2458.0ms TimeCoverageRelationStatistics Valid=997, Invalid=7745, Unknown=0, NotChecked=0, Total=8742 [2021-08-27 04:53:38,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-08-27 04:53:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1025. [2021-08-27 04:53:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1014 states have (on average 1.1183431952662721) internal successors, (1134), 1016 states have internal predecessors, (1134), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1142 transitions. [2021-08-27 04:53:38,040 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1142 transitions. Word has length 175 [2021-08-27 04:53:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:53:38,041 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1142 transitions. [2021-08-27 04:53:38,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 4.63013698630137) internal successors, (338), 72 states have internal predecessors, (338), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1142 transitions. [2021-08-27 04:53:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-08-27 04:53:38,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:53:38,042 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 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] [2021-08-27 04:53:38,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-27 04:53:38,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-27 04:53:38,243 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:53:38,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:53:38,244 INFO L82 PathProgramCache]: Analyzing trace with hash 494711078, now seen corresponding path program 28 times [2021-08-27 04:53:38,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:53:38,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905184077] [2021-08-27 04:53:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:53:38,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:53:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:39,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:53:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:39,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:53:39,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905184077] [2021-08-27 04:53:39,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905184077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:39,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332045344] [2021-08-27 04:53:39,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:53:39,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:53:39,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:53:39,208 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:53:39,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-27 04:53:42,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:53:42,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:53:42,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-27 04:53:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:53:42,940 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:53:42,940 INFO L388 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 9 treesize of output 15 [2021-08-27 04:53:44,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-27 04:53:46,459 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 04:53:46,459 INFO L388 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 34 treesize of output 25 [2021-08-27 04:53:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 706 proven. 465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:46,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332045344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:46,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:53:46,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 81 [2021-08-27 04:53:46,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473702291] [2021-08-27 04:53:46,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-27 04:53:46,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:53:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-27 04:53:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=6010, Unknown=0, NotChecked=0, Total=6480 [2021-08-27 04:53:46,478 INFO L87 Difference]: Start difference. First operand 1025 states and 1142 transitions. Second operand has 81 states, 79 states have (on average 4.3544303797468356) internal successors, (344), 78 states have internal predecessors, (344), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:53:52,224 INFO L93 Difference]: Finished difference Result 2035 states and 2226 transitions. [2021-08-27 04:53:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-27 04:53:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 4.3544303797468356) internal successors, (344), 78 states have internal predecessors, (344), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2021-08-27 04:53:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:53:52,226 INFO L225 Difference]: With dead ends: 2035 [2021-08-27 04:53:52,226 INFO L226 Difference]: Without dead ends: 1060 [2021-08-27 04:53:52,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4148.8ms TimeCoverageRelationStatistics Valid=1108, Invalid=13412, Unknown=0, NotChecked=0, Total=14520 [2021-08-27 04:53:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-08-27 04:53:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1045. [2021-08-27 04:53:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1034 states have (on average 1.11605415860735) internal successors, (1154), 1036 states have internal predecessors, (1154), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1162 transitions. [2021-08-27 04:53:52,233 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1162 transitions. Word has length 181 [2021-08-27 04:53:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:53:52,233 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1162 transitions. [2021-08-27 04:53:52,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 4.3544303797468356) internal successors, (344), 78 states have internal predecessors, (344), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:53:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1162 transitions. [2021-08-27 04:53:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-08-27 04:53:52,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:53:52,235 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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] [2021-08-27 04:53:52,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-27 04:53:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:53:52,435 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:53:52,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:53:52,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1059363177, now seen corresponding path program 29 times [2021-08-27 04:53:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:53:52,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225832509] [2021-08-27 04:53:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:53:52,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:53:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:53,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:53:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:53:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 378 proven. 854 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:53,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:53:53,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225832509] [2021-08-27 04:53:53,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225832509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:53,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740183307] [2021-08-27 04:53:53,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:53:53,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:53:53,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:53:53,340 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:53:53,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-27 04:53:57,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-27 04:53:57,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:53:57,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 101 conjunts are in the unsatisfiable core [2021-08-27 04:53:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:53:57,449 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:53:57,449 INFO L388 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 9 treesize of output 15 [2021-08-27 04:53:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:53:59,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740183307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:53:59,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:53:59,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38] total 57 [2021-08-27 04:53:59,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359169878] [2021-08-27 04:53:59,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-27 04:53:59,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:53:59,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-27 04:53:59,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=3037, Unknown=0, NotChecked=0, Total=3306 [2021-08-27 04:53:59,321 INFO L87 Difference]: Start difference. First operand 1045 states and 1162 transitions. Second operand has 58 states, 57 states have (on average 5.017543859649122) internal successors, (286), 56 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:54:02,328 INFO L93 Difference]: Finished difference Result 1503 states and 1631 transitions. [2021-08-27 04:54:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-27 04:54:02,329 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 5.017543859649122) internal successors, (286), 56 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2021-08-27 04:54:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:54:02,331 INFO L225 Difference]: With dead ends: 1503 [2021-08-27 04:54:02,331 INFO L226 Difference]: Without dead ends: 1501 [2021-08-27 04:54:02,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1694.2ms TimeCoverageRelationStatistics Valid=452, Invalid=5554, Unknown=0, NotChecked=0, Total=6006 [2021-08-27 04:54:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-08-27 04:54:02,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1081. [2021-08-27 04:54:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1070 states have (on average 1.1168224299065421) internal successors, (1195), 1072 states have internal predecessors, (1195), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1203 transitions. [2021-08-27 04:54:02,342 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1203 transitions. Word has length 185 [2021-08-27 04:54:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:54:02,342 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1203 transitions. [2021-08-27 04:54:02,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 5.017543859649122) internal successors, (286), 56 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1203 transitions. [2021-08-27 04:54:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-08-27 04:54:02,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:54:02,348 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 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] [2021-08-27 04:54:02,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-27 04:54:02,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-27 04:54:02,565 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:54:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:54:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash -602130563, now seen corresponding path program 30 times [2021-08-27 04:54:02,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:54:02,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808480445] [2021-08-27 04:54:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:54:02,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:54:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:54:03,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:54:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:54:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:54:03,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:54:03,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808480445] [2021-08-27 04:54:03,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808480445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:54:03,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761771739] [2021-08-27 04:54:03,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:54:03,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:54:03,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:54:03,540 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:54:03,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-27 04:54:07,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-27 04:54:07,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:54:07,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-27 04:54:07,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:54:07,916 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:54:07,917 INFO L388 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 9 treesize of output 15 [2021-08-27 04:54:09,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:54:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 833 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:54:11,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761771739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:54:11,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:54:11,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 87 [2021-08-27 04:54:11,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985436388] [2021-08-27 04:54:11,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-27 04:54:11,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:54:11,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-27 04:54:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=6949, Unknown=0, NotChecked=0, Total=7482 [2021-08-27 04:54:11,524 INFO L87 Difference]: Start difference. First operand 1081 states and 1203 transitions. Second operand has 87 states, 85 states have (on average 4.317647058823529) internal successors, (367), 84 states have internal predecessors, (367), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:54:18,085 INFO L93 Difference]: Finished difference Result 2152 states and 2353 transitions. [2021-08-27 04:54:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-27 04:54:18,085 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 85 states have (on average 4.317647058823529) internal successors, (367), 84 states have internal predecessors, (367), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-08-27 04:54:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:54:18,086 INFO L225 Difference]: With dead ends: 2152 [2021-08-27 04:54:18,086 INFO L226 Difference]: Without dead ends: 1116 [2021-08-27 04:54:18,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4441 ImplicationChecksByTransitivity, 4397.6ms TimeCoverageRelationStatistics Valid=1231, Invalid=15539, Unknown=0, NotChecked=0, Total=16770 [2021-08-27 04:54:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-08-27 04:54:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1101. [2021-08-27 04:54:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1090 states have (on average 1.114678899082569) internal successors, (1215), 1092 states have internal predecessors, (1215), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1223 transitions. [2021-08-27 04:54:18,093 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1223 transitions. Word has length 191 [2021-08-27 04:54:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:54:18,094 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1223 transitions. [2021-08-27 04:54:18,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 85 states have (on average 4.317647058823529) internal successors, (367), 84 states have internal predecessors, (367), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1223 transitions. [2021-08-27 04:54:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-08-27 04:54:18,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:54:18,095 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 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] [2021-08-27 04:54:18,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-27 04:54:18,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:54:18,317 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:54:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:54:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1831016448, now seen corresponding path program 31 times [2021-08-27 04:54:18,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:54:18,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757757266] [2021-08-27 04:54:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:54:18,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:54:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:54:19,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:54:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:54:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 435 proven. 959 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:54:19,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:54:19,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757757266] [2021-08-27 04:54:19,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757757266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:54:19,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848498498] [2021-08-27 04:54:19,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:54:19,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:54:19,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:54:19,166 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:54:19,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-27 04:54:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:54:23,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 100 conjunts are in the unsatisfiable core [2021-08-27 04:54:23,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:54:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 496 proven. 898 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:54:24,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848498498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:54:24,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:54:24,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 65 [2021-08-27 04:54:24,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907133689] [2021-08-27 04:54:24,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-27 04:54:24,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:54:24,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-27 04:54:24,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=3725, Unknown=0, NotChecked=0, Total=4290 [2021-08-27 04:54:24,922 INFO L87 Difference]: Start difference. First operand 1101 states and 1223 transitions. Second operand has 66 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 63 states have internal predecessors, (281), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:54:28,043 INFO L93 Difference]: Finished difference Result 1584 states and 1717 transitions. [2021-08-27 04:54:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-27 04:54:28,043 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 63 states have internal predecessors, (281), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2021-08-27 04:54:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:54:28,044 INFO L225 Difference]: With dead ends: 1584 [2021-08-27 04:54:28,045 INFO L226 Difference]: Without dead ends: 1582 [2021-08-27 04:54:28,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2264 ImplicationChecksByTransitivity, 1793.1ms TimeCoverageRelationStatistics Valid=800, Invalid=6682, Unknown=0, NotChecked=0, Total=7482 [2021-08-27 04:54:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-08-27 04:54:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1137. [2021-08-27 04:54:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1126 states have (on average 1.1154529307282415) internal successors, (1256), 1128 states have internal predecessors, (1256), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1264 transitions. [2021-08-27 04:54:28,057 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1264 transitions. Word has length 195 [2021-08-27 04:54:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:54:28,058 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1264 transitions. [2021-08-27 04:54:28,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 63 states have internal predecessors, (281), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1264 transitions. [2021-08-27 04:54:28,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-08-27 04:54:28,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:54:28,059 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 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] [2021-08-27 04:54:28,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-27 04:54:28,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:54:28,280 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:54:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:54:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash -542181164, now seen corresponding path program 32 times [2021-08-27 04:54:28,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:54:28,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890824833] [2021-08-27 04:54:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:54:28,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:54:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:54:29,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:54:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:54:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:54:29,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:54:29,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890824833] [2021-08-27 04:54:29,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890824833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:54:29,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171243274] [2021-08-27 04:54:29,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:54:29,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:54:29,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:54:29,383 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:54:29,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-27 04:54:33,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:54:33,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:54:33,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 124 conjunts are in the unsatisfiable core [2021-08-27 04:54:33,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:54:34,625 INFO L388 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 21 treesize of output 17 [2021-08-27 04:54:35,252 INFO L388 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 [2021-08-27 04:54:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:54:35,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171243274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:54:35,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:54:35,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45] total 71 [2021-08-27 04:54:35,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927047617] [2021-08-27 04:54:35,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-27 04:54:35,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:54:35,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-27 04:54:35,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=4783, Unknown=0, NotChecked=0, Total=4970 [2021-08-27 04:54:35,281 INFO L87 Difference]: Start difference. First operand 1137 states and 1264 transitions. Second operand has 71 states, 69 states have (on average 4.159420289855072) internal successors, (287), 68 states have internal predecessors, (287), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:54:42,025 INFO L93 Difference]: Finished difference Result 2269 states and 2480 transitions. [2021-08-27 04:54:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-27 04:54:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 69 states have (on average 4.159420289855072) internal successors, (287), 68 states have internal predecessors, (287), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2021-08-27 04:54:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:54:42,026 INFO L225 Difference]: With dead ends: 2269 [2021-08-27 04:54:42,026 INFO L226 Difference]: Without dead ends: 1172 [2021-08-27 04:54:42,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2675.0ms TimeCoverageRelationStatistics Valid=438, Invalid=8874, Unknown=0, NotChecked=0, Total=9312 [2021-08-27 04:54:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-08-27 04:54:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1157. [2021-08-27 04:54:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1146 states have (on average 1.1134380453752182) internal successors, (1276), 1148 states have internal predecessors, (1276), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1284 transitions. [2021-08-27 04:54:42,034 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1284 transitions. Word has length 201 [2021-08-27 04:54:42,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:54:42,034 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 1284 transitions. [2021-08-27 04:54:42,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 69 states have (on average 4.159420289855072) internal successors, (287), 68 states have internal predecessors, (287), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:54:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1284 transitions. [2021-08-27 04:54:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-08-27 04:54:42,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:54:42,036 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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] [2021-08-27 04:54:42,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-27 04:54:42,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-27 04:54:42,255 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting cstrspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:54:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:54:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1839521385, now seen corresponding path program 33 times [2021-08-27 04:54:42,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:54:42,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29803641] [2021-08-27 04:54:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:54:42,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:54:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:54:43,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:54:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:54:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 496 proven. 1070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:54:43,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:54:43,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29803641] [2021-08-27 04:54:43,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29803641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:54:43,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727690631] [2021-08-27 04:54:43,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:54:43,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:54:43,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:54:43,235 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:54:43,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-27 04:54:48,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-27 04:54:48,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:54:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 04:54:48,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:54:48,374 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:54:48,374 INFO L388 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 9 treesize of output 15 [2021-08-27 04:54:48,817 INFO L388 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 23 treesize of output 19 [2021-08-27 04:54:50,175 INFO L354 Elim1Store]: treesize reduction 3, result has 76.9 percent of original size [2021-08-27 04:54:50,176 INFO L388 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 27 treesize of output 24 [2021-08-27 04:54:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 51 proven. 52 refuted. 0 times theorem prover too weak. 1464 trivial. 0 not checked. [2021-08-27 04:54:50,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727690631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:54:50,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:54:50,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 11] total 54 [2021-08-27 04:54:50,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046766957] [2021-08-27 04:54:50,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-27 04:54:50,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:54:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-27 04:54:50,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=2648, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 04:54:50,264 INFO L87 Difference]: Start difference. First operand 1157 states and 1284 transitions. Second operand has 55 states, 52 states have (on average 4.5) internal successors, (234), 52 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:55:01,032 INFO L93 Difference]: Finished difference Result 1608 states and 1719 transitions. [2021-08-27 04:55:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-08-27 04:55:01,032 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 4.5) internal successors, (234), 52 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2021-08-27 04:55:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:55:01,033 INFO L225 Difference]: With dead ends: 1608 [2021-08-27 04:55:01,033 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 04:55:01,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9419 ImplicationChecksByTransitivity, 8123.7ms TimeCoverageRelationStatistics Valid=2270, Invalid=27486, Unknown=0, NotChecked=0, Total=29756 [2021-08-27 04:55:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 04:55:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 04:55:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 04:55:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 04:55:01,035 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 205 [2021-08-27 04:55:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:55:01,035 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 04:55:01,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 4.5) internal successors, (234), 52 states have internal predecessors, (234), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:55:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 04:55:01,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 04:55:01,037 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:55:01,037 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:55:01,037 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:55:01,038 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:55:01,038 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-08-27 04:55:01,038 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-08-27 04:55:01,038 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-08-27 04:55:01,038 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-08-27 04:55:01,038 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:55:01,039 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr0REQUIRES_VIOLATION [2021-08-27 04:55:01,039 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr1REQUIRES_VIOLATION [2021-08-27 04:55:01,039 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr2REQUIRES_VIOLATION [2021-08-27 04:55:01,039 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr3REQUIRES_VIOLATION [2021-08-27 04:55:01,039 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr4REQUIRES_VIOLATION [2021-08-27 04:55:01,039 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr5REQUIRES_VIOLATION [2021-08-27 04:55:01,039 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr6REQUIRES_VIOLATION [2021-08-27 04:55:01,040 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr7REQUIRES_VIOLATION [2021-08-27 04:55:01,040 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr8REQUIRES_VIOLATION [2021-08-27 04:55:01,040 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr9REQUIRES_VIOLATION [2021-08-27 04:55:01,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-27 04:55:01,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-27 04:55:01,256 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:55:01,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:55:01 BoogieIcfgContainer [2021-08-27 04:55:01,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:55:01,258 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:55:01,258 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:55:01,258 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:55:01,259 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:43:31" (3/4) ... [2021-08-27 04:55:01,275 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 04:55:01,280 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 04:55:01,280 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 04:55:01,280 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 04:55:01,280 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 04:55:01,281 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 04:55:01,281 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 04:55:01,281 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrspn [2021-08-27 04:55:01,281 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 04:55:01,299 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-08-27 04:55:01,299 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-27 04:55:01,299 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:55:01,300 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:55:01,363 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:55:01,363 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:55:01,364 INFO L168 Benchmark]: Toolchain (without parser) took 690577.79 ms. Allocated memory was 52.4 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 27.9 MB in the beginning and 1.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 568.4 MB. Max. memory is 16.1 GB. [2021-08-27 04:55:01,364 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 52.4 MB. Free memory was 34.1 MB in the beginning and 34.0 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:55:01,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.94 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 27.7 MB in the beginning and 46.6 MB in the end (delta: -18.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:55:01,364 INFO L168 Benchmark]: Boogie Preprocessor took 67.68 ms. Allocated memory is still 69.2 MB. Free memory was 46.6 MB in the beginning and 44.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:55:01,364 INFO L168 Benchmark]: RCFGBuilder took 772.98 ms. Allocated memory is still 69.2 MB. Free memory was 44.0 MB in the beginning and 34.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:55:01,365 INFO L168 Benchmark]: TraceAbstraction took 689320.71 ms. Allocated memory was 69.2 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 33.9 MB in the beginning and 1.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 555.4 MB. Max. memory is 16.1 GB. [2021-08-27 04:55:01,365 INFO L168 Benchmark]: Witness Printer took 104.75 ms. Allocated memory is still 1.9 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:55:01,366 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 52.4 MB. Free memory was 34.1 MB in the beginning and 34.0 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.94 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 27.7 MB in the beginning and 46.6 MB in the end (delta: -18.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.68 ms. Allocated memory is still 69.2 MB. Free memory was 46.6 MB in the beginning and 44.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 772.98 ms. Allocated memory is still 69.2 MB. Free memory was 44.0 MB in the beginning and 34.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 689320.71 ms. Allocated memory was 69.2 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 33.9 MB in the beginning and 1.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 555.4 MB. Max. memory is 16.1 GB. * Witness Printer took 104.75 ms. Allocated memory is still 1.9 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 77 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 689263.1ms, OverallIterations: 68, TraceHistogramMax: 18, EmptinessCheckTime: 122.2ms, AutomataDifference: 497355.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4850 SDtfs, 27438 SDslu, 28232 SDs, 0 SdLazy, 215384 SolverSat, 2714 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 91292.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7890 GetRequests, 4509 SyntacticMatches, 33 SemanticMatches, 3348 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71298 ImplicationChecksByTransitivity, 426822.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10571occurred in iteration=54, InterpolantAutomatonStates: 1803, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1337.0ms AutomataMinimizationTime, 68 MinimizatonAttempts, 18395 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 711.4ms SsaConstructionTime, 5354.9ms SatisfiabilityAnalysisTime, 89895.3ms InterpolantComputationTime, 10835 NumberOfCodeBlocks, 10716 NumberOfCodeBlocksAsserted, 314 NumberOfCheckSat, 10718 ConstructedInterpolants, 833 QuantifiedInterpolants, 119538 SizeOfPredicates, 549 NumberOfNonLiveVariables, 18655 ConjunctsInSsa, 2833 ConjunctsInUnsatCore, 117 InterpolantComputations, 19 PerfectInterpolantSequences, 11232/40527 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 04:55:01,596 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-27 04:55:01,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...