./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf 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/openbsd_cstrspn-alloca-2.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 46421108dc6473f7bf7bcbb7826a3247c1ccc8d1 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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-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:38:44,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:38:44,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:38:44,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:38:44,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:38:44,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:38:44,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:38:44,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:38:44,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:38:44,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:38:44,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:38:44,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:38:44,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:38:44,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:38:44,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:38:44,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:38:44,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:38:44,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:38:44,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:38:44,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:38:44,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:38:44,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:38:44,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:38:44,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:38:44,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:38:44,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:38:44,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:38:44,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:38:44,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:38:44,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:38:44,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:38:44,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:38:44,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:38:44,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:38:44,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:38:44,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:38:44,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:38:44,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:38:44,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:38:44,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:38:44,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:38:44,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 16:38:44,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:38:44,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:38:44,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:38:44,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:38:44,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:38:44,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:38:44,198 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:38:44,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:38:44,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:38:44,199 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:38:44,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:38:44,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:38:44,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:38:44,200 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:38:44,200 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:38:44,200 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 16:38:44,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:38:44,201 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:38:44,201 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:38:44,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:38:44,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:38:44,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:38:44,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:38:44,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:38:44,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:38:44,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:38:44,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:38:44,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:38:44,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:38:44,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46421108dc6473f7bf7bcbb7826a3247c1ccc8d1 [2021-08-30 16:38:44,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:38:44,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:38:44,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:38:44,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:38:44,488 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:38:44,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-08-30 16:38:44,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d10e2a9cb/53e9511c82044a3c98adba6b4e9ff665/FLAG0ccb2a5a8 [2021-08-30 16:38:45,030 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:38:45,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-08-30 16:38:45,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d10e2a9cb/53e9511c82044a3c98adba6b4e9ff665/FLAG0ccb2a5a8 [2021-08-30 16:38:45,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d10e2a9cb/53e9511c82044a3c98adba6b4e9ff665 [2021-08-30 16:38:45,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:38:45,518 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:38:45,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:38:45,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:38:45,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:38:45,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:38:45" (1/1) ... [2021-08-30 16:38:45,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@568396b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45, skipping insertion in model container [2021-08-30 16:38:45,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:38:45" (1/1) ... [2021-08-30 16:38:45,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:38:45,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:38:45,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:38:45,782 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:38:45,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:38:45,845 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:38:45,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45 WrapperNode [2021-08-30 16:38:45,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:38:45,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:38:45,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:38:45,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:38:45,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45" (1/1) ... [2021-08-30 16:38:45,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45" (1/1) ... [2021-08-30 16:38:45,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45" (1/1) ... [2021-08-30 16:38:45,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45" (1/1) ... [2021-08-30 16:38:45,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45" (1/1) ... [2021-08-30 16:38:45,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45" (1/1) ... [2021-08-30 16:38:45,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45" (1/1) ... [2021-08-30 16:38:45,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:38:45,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:38:45,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:38:45,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:38:45,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45" (1/1) ... [2021-08-30 16:38:45,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:38:45,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:45,958 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) [2021-08-30 16:38:46,025 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 [2021-08-30 16:38:46,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:38:46,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:38:46,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 16:38:46,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 16:38:46,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 16:38:46,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 16:38:46,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 16:38:46,049 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrspn [2021-08-30 16:38:46,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:38:46,049 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 16:38:46,049 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 16:38:46,049 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 16:38:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 16:38:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 16:38:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 16:38:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 16:38:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 16:38:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 16:38:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 16:38:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 16:38:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 16:38:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 16:38:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 16:38:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 16:38:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 16:38:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 16:38:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 16:38:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 16:38:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 16:38:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 16:38:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 16:38:46,052 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 16:38:46,052 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 16:38:46,052 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 16:38:46,052 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 16:38:46,052 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 16:38:46,052 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 16:38:46,052 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 16:38:46,052 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 16:38:46,052 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 16:38:46,053 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 16:38:46,053 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 16:38:46,053 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 16:38:46,053 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 16:38:46,053 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 16:38:46,053 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 16:38:46,053 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 16:38:46,053 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 16:38:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 16:38:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 16:38:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 16:38:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 16:38:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 16:38:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 16:38:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 16:38:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 16:38:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 16:38:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 16:38:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 16:38:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 16:38:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 16:38:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 16:38:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 16:38:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 16:38:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 16:38:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 16:38:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 16:38:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 16:38:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 16:38:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 16:38:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 16:38:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 16:38:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 16:38:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 16:38:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 16:38:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 16:38:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 16:38:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 16:38:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 16:38:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 16:38:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 16:38:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 16:38:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 16:38:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 16:38:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 16:38:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 16:38:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 16:38:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 16:38:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 16:38:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 16:38:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 16:38:46,061 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 16:38:46,061 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 16:38:46,061 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 16:38:46,061 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 16:38:46,061 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 16:38:46,061 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 16:38:46,061 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 16:38:46,061 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 16:38:46,061 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 16:38:46,062 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 16:38:46,062 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 16:38:46,062 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 16:38:46,062 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 16:38:46,062 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 16:38:46,062 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 16:38:46,062 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 16:38:46,062 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 16:38:46,063 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 16:38:46,063 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 16:38:46,063 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 16:38:46,063 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 16:38:46,063 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 16:38:46,064 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 16:38:46,064 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 16:38:46,064 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 16:38:46,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:38:46,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-30 16:38:46,064 INFO L130 BoogieDeclarations]: Found specification of procedure cstrspn [2021-08-30 16:38:46,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 16:38:46,064 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:38:46,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:38:46,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 16:38:46,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:38:46,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:38:46,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:38:46,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:38:46,316 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-30 16:38:46,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:38:46 BoogieIcfgContainer [2021-08-30 16:38:46,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:38:46,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:38:46,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:38:46,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:38:46,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:38:45" (1/3) ... [2021-08-30 16:38:46,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123a892d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:38:46, skipping insertion in model container [2021-08-30 16:38:46,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:45" (2/3) ... [2021-08-30 16:38:46,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123a892d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:38:46, skipping insertion in model container [2021-08-30 16:38:46,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:38:46" (3/3) ... [2021-08-30 16:38:46,322 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2021-08-30 16:38:46,325 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:38:46,325 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-08-30 16:38:46,350 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:38:46,354 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 [2021-08-30 16:38:46,354 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-08-30 16:38:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 44 states have internal predecessors, (53), 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) [2021-08-30 16:38:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:38:46,367 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:46,367 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:46,367 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:46,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1915750614, now seen corresponding path program 1 times [2021-08-30 16:38:46,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:46,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458227920] [2021-08-30 16:38:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:46,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:46,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:46,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458227920] [2021-08-30 16:38:46,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458227920] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:46,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:46,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:38:46,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031081360] [2021-08-30 16:38:46,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:38:46,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:46,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:38:46,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:38:46,632 INFO L87 Difference]: Start difference. First operand has 51 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 44 states have internal predecessors, (53), 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) [2021-08-30 16:38:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:46,829 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-08-30 16:38:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:38:46,831 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 [2021-08-30 16:38:46,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:46,837 INFO L225 Difference]: With dead ends: 72 [2021-08-30 16:38:46,837 INFO L226 Difference]: Without dead ends: 68 [2021-08-30 16:38:46,838 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.78ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:38:46,840 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.28ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.04ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:46,841 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 185 Unknown, 0 Unchecked, 4.28ms Time], IncrementalHoareTripleChecker [6 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 148.04ms Time] [2021-08-30 16:38:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-30 16:38:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2021-08-30 16:38:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 45 states have internal predecessors, (52), 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) [2021-08-30 16:38:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-08-30 16:38:46,865 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 11 [2021-08-30 16:38:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:46,865 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-08-30 16:38:46,865 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) [2021-08-30 16:38:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-08-30 16:38:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:38:46,866 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:46,866 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:46,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 16:38:46,867 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:46,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1917597656, now seen corresponding path program 1 times [2021-08-30 16:38:46,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:46,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418489816] [2021-08-30 16:38:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:46,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:46,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:46,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:46,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418489816] [2021-08-30 16:38:46,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418489816] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:46,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:46,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:38:46,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702669756] [2021-08-30 16:38:46,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:38:46,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:46,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:38:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:38:46,933 INFO L87 Difference]: Start difference. First operand 51 states and 57 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) [2021-08-30 16:38:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:47,040 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-08-30 16:38:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:38:47,041 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 [2021-08-30 16:38:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:47,042 INFO L225 Difference]: With dead ends: 73 [2021-08-30 16:38:47,042 INFO L226 Difference]: Without dead ends: 73 [2021-08-30 16:38:47,042 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.86ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:38:47,043 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.01ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:47,044 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 15 Invalid, 177 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [3 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 93.01ms Time] [2021-08-30 16:38:47,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-30 16:38:47,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2021-08-30 16:38:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.6) internal successors, (56), 47 states have internal predecessors, (56), 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) [2021-08-30 16:38:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-08-30 16:38:47,049 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 11 [2021-08-30 16:38:47,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:47,049 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-08-30 16:38:47,049 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) [2021-08-30 16:38:47,049 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-08-30 16:38:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:38:47,050 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:47,050 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:47,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 16:38:47,050 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:47,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1917597655, now seen corresponding path program 1 times [2021-08-30 16:38:47,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:47,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885320864] [2021-08-30 16:38:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:47,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:47,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:47,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885320864] [2021-08-30 16:38:47,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885320864] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:47,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:47,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:38:47,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946718672] [2021-08-30 16:38:47,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:38:47,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:47,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:38:47,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:38:47,082 INFO L87 Difference]: Start difference. First operand 53 states and 61 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) [2021-08-30 16:38:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:47,140 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-08-30 16:38:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:38:47,141 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 [2021-08-30 16:38:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:47,141 INFO L225 Difference]: With dead ends: 51 [2021-08-30 16:38:47,141 INFO L226 Difference]: Without dead ends: 51 [2021-08-30 16:38:47,142 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.92ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:38:47,142 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.21ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:47,143 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 8 Invalid, 102 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 53.21ms Time] [2021-08-30 16:38:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-30 16:38:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-30 16:38:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 45 states have internal predecessors, (53), 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) [2021-08-30 16:38:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-08-30 16:38:47,146 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 11 [2021-08-30 16:38:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:47,147 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-08-30 16:38:47,147 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) [2021-08-30 16:38:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-08-30 16:38:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:38:47,147 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:47,147 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:47,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 16:38:47,148 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1504681331, now seen corresponding path program 1 times [2021-08-30 16:38:47,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:47,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378494682] [2021-08-30 16:38:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:47,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:47,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:47,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378494682] [2021-08-30 16:38:47,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378494682] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:47,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:47,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:38:47,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634929474] [2021-08-30 16:38:47,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:38:47,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:47,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:38:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:38:47,192 INFO L87 Difference]: Start difference. First operand 51 states and 58 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) [2021-08-30 16:38:47,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:47,259 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-08-30 16:38:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:38:47,259 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 [2021-08-30 16:38:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:47,260 INFO L225 Difference]: With dead ends: 50 [2021-08-30 16:38:47,260 INFO L226 Difference]: Without dead ends: 50 [2021-08-30 16:38:47,260 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.04ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:38:47,261 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.54ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:47,261 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 13 Invalid, 118 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 56.54ms Time] [2021-08-30 16:38:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-30 16:38:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-30 16:38:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 44 states have internal predecessors, (52), 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) [2021-08-30 16:38:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-08-30 16:38:47,264 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 13 [2021-08-30 16:38:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:47,265 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-08-30 16:38:47,265 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) [2021-08-30 16:38:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-08-30 16:38:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:38:47,265 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:47,266 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:47,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 16:38:47,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:47,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:47,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1504681279, now seen corresponding path program 1 times [2021-08-30 16:38:47,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:47,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996558428] [2021-08-30 16:38:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:47,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:47,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:47,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996558428] [2021-08-30 16:38:47,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996558428] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:47,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:47,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:38:47,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734992311] [2021-08-30 16:38:47,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:38:47,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:38:47,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:38:47,301 INFO L87 Difference]: Start difference. First operand 50 states and 57 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) [2021-08-30 16:38:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:47,371 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-08-30 16:38:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:38:47,372 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 [2021-08-30 16:38:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:47,373 INFO L225 Difference]: With dead ends: 70 [2021-08-30 16:38:47,373 INFO L226 Difference]: Without dead ends: 70 [2021-08-30 16:38:47,373 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.57ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:38:47,374 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.95ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.04ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:47,374 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 12 Invalid, 130 Unknown, 0 Unchecked, 0.95ms Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 61.04ms Time] [2021-08-30 16:38:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-30 16:38:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2021-08-30 16:38:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.434782608695652) 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) [2021-08-30 16:38:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-08-30 16:38:47,377 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 13 [2021-08-30 16:38:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:47,378 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-08-30 16:38:47,378 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) [2021-08-30 16:38:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-08-30 16:38:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:38:47,378 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:47,378 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:47,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 16:38:47,379 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:47,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1447422977, now seen corresponding path program 1 times [2021-08-30 16:38:47,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:47,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245574648] [2021-08-30 16:38:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:47,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:47,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:47,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245574648] [2021-08-30 16:38:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245574648] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:47,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:47,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:38:47,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987521984] [2021-08-30 16:38:47,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:38:47,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:47,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:38:47,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:38:47,405 INFO L87 Difference]: Start difference. First operand 61 states and 71 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) [2021-08-30 16:38:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:47,454 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-08-30 16:38:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:38:47,455 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 [2021-08-30 16:38:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:47,455 INFO L225 Difference]: With dead ends: 59 [2021-08-30 16:38:47,455 INFO L226 Difference]: Without dead ends: 59 [2021-08-30 16:38:47,456 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.73ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:38:47,456 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.42ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:47,457 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 8 Invalid, 96 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 46.42ms Time] [2021-08-30 16:38:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-30 16:38:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-30 16:38:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.391304347826087) internal successors, (64), 53 states have internal predecessors, (64), 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) [2021-08-30 16:38:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-08-30 16:38:47,460 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 13 [2021-08-30 16:38:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:47,460 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-08-30 16:38:47,460 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) [2021-08-30 16:38:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-08-30 16:38:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:38:47,461 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:47,461 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:47,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 16:38:47,461 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1447422976, now seen corresponding path program 1 times [2021-08-30 16:38:47,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:47,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351284547] [2021-08-30 16:38:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:47,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:47,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:47,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351284547] [2021-08-30 16:38:47,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351284547] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:47,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:47,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:38:47,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407354812] [2021-08-30 16:38:47,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:38:47,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:47,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:38:47,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:38:47,513 INFO L87 Difference]: Start difference. First operand 59 states and 69 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) [2021-08-30 16:38:47,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:47,603 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-08-30 16:38:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:38:47,603 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 [2021-08-30 16:38:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:47,604 INFO L225 Difference]: With dead ends: 70 [2021-08-30 16:38:47,604 INFO L226 Difference]: Without dead ends: 70 [2021-08-30 16:38:47,604 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.63ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:38:47,605 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.78ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:47,605 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 13 Invalid, 161 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 79.78ms Time] [2021-08-30 16:38:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-30 16:38:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2021-08-30 16:38:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 55 states have internal predecessors, (67), 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) [2021-08-30 16:38:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-08-30 16:38:47,608 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 13 [2021-08-30 16:38:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:47,609 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-08-30 16:38:47,609 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) [2021-08-30 16:38:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-08-30 16:38:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-30 16:38:47,609 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:47,609 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:47,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 16:38:47,610 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:47,610 INFO L82 PathProgramCache]: Analyzing trace with hash 599518995, now seen corresponding path program 1 times [2021-08-30 16:38:47,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:47,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698906210] [2021-08-30 16:38:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:47,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:47,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:47,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698906210] [2021-08-30 16:38:47,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698906210] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:47,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:47,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:38:47,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623181980] [2021-08-30 16:38:47,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:38:47,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:47,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:38:47,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:38:47,645 INFO L87 Difference]: Start difference. First operand 61 states and 72 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) [2021-08-30 16:38:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:47,699 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-08-30 16:38:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:38:47,700 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 [2021-08-30 16:38:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:47,701 INFO L225 Difference]: With dead ends: 60 [2021-08-30 16:38:47,701 INFO L226 Difference]: Without dead ends: 60 [2021-08-30 16:38:47,701 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.89ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:38:47,701 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.55ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.11ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:47,702 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 10 Invalid, 92 Unknown, 0 Unchecked, 0.55ms Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 46.11ms Time] [2021-08-30 16:38:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-30 16:38:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-30 16:38:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.375) internal successors, (66), 54 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) [2021-08-30 16:38:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-08-30 16:38:47,705 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 14 [2021-08-30 16:38:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:47,705 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-08-30 16:38:47,705 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) [2021-08-30 16:38:47,705 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-08-30 16:38:47,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 16:38:47,706 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:47,706 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:47,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 16:38:47,706 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:47,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:47,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2133845019, now seen corresponding path program 1 times [2021-08-30 16:38:47,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:47,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52681329] [2021-08-30 16:38:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:47,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:47,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:47,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52681329] [2021-08-30 16:38:47,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52681329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:47,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552045834] [2021-08-30 16:38:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:47,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:47,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:47,785 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) [2021-08-30 16:38:47,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 16:38:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-30 16:38:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:47,969 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:38:47,981 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 [2021-08-30 16:38:47,985 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 [2021-08-30 16:38:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:48,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:48,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552045834] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:48,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:48,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-08-30 16:38:48,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22441128] [2021-08-30 16:38:48,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:38:48,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:38:48,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:38:48,241 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-08-30 16:38:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:48,431 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2021-08-30 16:38:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:38:48,431 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 [2021-08-30 16:38:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:48,432 INFO L225 Difference]: With dead ends: 97 [2021-08-30 16:38:48,432 INFO L226 Difference]: Without dead ends: 97 [2021-08-30 16:38:48,432 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 88.71ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:38:48,433 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 123.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.97ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:48,433 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 25 Invalid, 364 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [14 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 150.97ms Time] [2021-08-30 16:38:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-30 16:38:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-08-30 16:38:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 49 states have internal predecessors, (58), 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) [2021-08-30 16:38:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-08-30 16:38:48,440 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 15 [2021-08-30 16:38:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:48,440 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-08-30 16:38:48,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-08-30 16:38:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-08-30 16:38:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-30 16:38:48,441 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:48,441 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:48,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-30 16:38:48,648 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 [2021-08-30 16:38:48,649 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrspnErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:48,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:48,649 INFO L82 PathProgramCache]: Analyzing trace with hash -145961679, now seen corresponding path program 1 times [2021-08-30 16:38:48,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:48,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369213178] [2021-08-30 16:38:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:48,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:48,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:48,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:48,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369213178] [2021-08-30 16:38:48,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369213178] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:48,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:48,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 16:38:48,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038029143] [2021-08-30 16:38:48,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 16:38:48,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 16:38:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:38:48,692 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-08-30 16:38:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:48,790 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-08-30 16:38:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:38:48,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 18 [2021-08-30 16:38:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:48,791 INFO L225 Difference]: With dead ends: 54 [2021-08-30 16:38:48,791 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 16:38:48,792 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.07ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:38:48,792 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.71ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:48,792 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 17 Invalid, 183 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [6 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 70.71ms Time] [2021-08-30 16:38:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 16:38:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-30 16:38:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 states have internal predecessors, (57), 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) [2021-08-30 16:38:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-08-30 16:38:48,795 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 18 [2021-08-30 16:38:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:48,795 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-08-30 16:38:48,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-08-30 16:38:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-08-30 16:38:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-30 16:38:48,796 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:48,796 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:48,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 16:38:48,796 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:48,797 INFO L82 PathProgramCache]: Analyzing trace with hash -145961678, now seen corresponding path program 1 times [2021-08-30 16:38:48,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:48,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321360142] [2021-08-30 16:38:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:48,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:48,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:48,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:48,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321360142] [2021-08-30 16:38:48,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321360142] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:48,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:48,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 16:38:48,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259423137] [2021-08-30 16:38:48,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 16:38:48,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:48,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 16:38:48,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 16:38:48,867 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-08-30 16:38:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:49,006 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-08-30 16:38:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:38:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 18 [2021-08-30 16:38:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:49,007 INFO L225 Difference]: With dead ends: 57 [2021-08-30 16:38:49,007 INFO L226 Difference]: Without dead ends: 57 [2021-08-30 16:38:49,007 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 69.64ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:38:49,007 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 73 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.62ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:49,008 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 25 Invalid, 244 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [9 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 93.62ms Time] [2021-08-30 16:38:49,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-30 16:38:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-08-30 16:38:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 50 states have internal predecessors, (59), 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) [2021-08-30 16:38:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-08-30 16:38:49,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 18 [2021-08-30 16:38:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:49,010 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-08-30 16:38:49,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-08-30 16:38:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-08-30 16:38:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:38:49,011 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:49,011 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:49,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-30 16:38:49,011 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:49,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1452007619, now seen corresponding path program 1 times [2021-08-30 16:38:49,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:49,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966354883] [2021-08-30 16:38:49,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:49,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:49,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:49,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:49,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966354883] [2021-08-30 16:38:49,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966354883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:49,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112777603] [2021-08-30 16:38:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:49,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:49,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:49,093 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) [2021-08-30 16:38:49,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 16:38:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-30 16:38:49,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:49,191 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:38:49,191 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 [2021-08-30 16:38:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:49,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:49,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112777603] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:49,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:49,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-08-30 16:38:49,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358428264] [2021-08-30 16:38:49,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 16:38:49,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 16:38:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:38:49,386 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) [2021-08-30 16:38:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:49,584 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-08-30 16:38:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 16:38:49,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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 [2021-08-30 16:38:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:49,585 INFO L225 Difference]: With dead ends: 70 [2021-08-30 16:38:49,585 INFO L226 Difference]: Without dead ends: 70 [2021-08-30 16:38:49,585 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 119.13ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-30 16:38:49,585 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.64ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:49,586 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 28 Invalid, 356 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [19 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 146.64ms Time] [2021-08-30 16:38:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-30 16:38:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-08-30 16:38:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.25) internal successors, (55), 47 states have internal predecessors, (55), 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) [2021-08-30 16:38:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-08-30 16:38:49,588 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-08-30 16:38:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:49,588 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-08-30 16:38:49,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) [2021-08-30 16:38:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-08-30 16:38:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:38:49,588 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:49,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:49,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-30 16:38:49,796 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 [2021-08-30 16:38:49,797 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrspnErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1837428737, now seen corresponding path program 1 times [2021-08-30 16:38:49,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:49,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549733393] [2021-08-30 16:38:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:49,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:49,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:49,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:49,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549733393] [2021-08-30 16:38:49,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549733393] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:49,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:49,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 16:38:49,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971709892] [2021-08-30 16:38:49,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:38:49,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:49,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:38:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:38:49,838 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-08-30 16:38:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:49,954 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-08-30 16:38:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:38:49,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 [2021-08-30 16:38:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:49,955 INFO L225 Difference]: With dead ends: 53 [2021-08-30 16:38:49,955 INFO L226 Difference]: Without dead ends: 53 [2021-08-30 16:38:49,956 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.26ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:38:49,956 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 71 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.06ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:49,956 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 20 Invalid, 212 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 78.06ms Time] [2021-08-30 16:38:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-30 16:38:49,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-08-30 16:38:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 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) [2021-08-30 16:38:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-08-30 16:38:49,958 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 21 [2021-08-30 16:38:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:49,959 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-08-30 16:38:49,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-08-30 16:38:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-08-30 16:38:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:38:49,959 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:49,959 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:49,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-30 16:38:49,960 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:49,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1837428736, now seen corresponding path program 1 times [2021-08-30 16:38:49,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:49,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868148183] [2021-08-30 16:38:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:49,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:50,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:50,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:50,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868148183] [2021-08-30 16:38:50,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868148183] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:50,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:50,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-30 16:38:50,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745108326] [2021-08-30 16:38:50,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:38:50,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:50,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:38:50,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:38:50,036 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-30 16:38:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:50,201 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-08-30 16:38:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 16:38:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-08-30 16:38:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:50,202 INFO L225 Difference]: With dead ends: 56 [2021-08-30 16:38:50,202 INFO L226 Difference]: Without dead ends: 56 [2021-08-30 16:38:50,203 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 96.22ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-30 16:38:50,203 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.43ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:50,203 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 28 Invalid, 261 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [10 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 97.43ms Time] [2021-08-30 16:38:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-30 16:38:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-08-30 16:38:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 48 states have internal predecessors, (56), 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) [2021-08-30 16:38:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-08-30 16:38:50,205 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 21 [2021-08-30 16:38:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:50,205 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-08-30 16:38:50,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-08-30 16:38:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-08-30 16:38:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 16:38:50,205 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:50,206 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 16:38:50,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-30 16:38:50,206 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:50,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:50,206 INFO L82 PathProgramCache]: Analyzing trace with hash 291331133, now seen corresponding path program 1 times [2021-08-30 16:38:50,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:50,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220864136] [2021-08-30 16:38:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:50,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:50,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:50,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:50,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220864136] [2021-08-30 16:38:50,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220864136] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:50,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:50,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-30 16:38:50,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74048107] [2021-08-30 16:38:50,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 16:38:50,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:50,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 16:38:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:38:50,318 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-08-30 16:38:50,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:50,573 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-08-30 16:38:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 16:38:50,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 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 26 [2021-08-30 16:38:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:50,574 INFO L225 Difference]: With dead ends: 84 [2021-08-30 16:38:50,574 INFO L226 Difference]: Without dead ends: 84 [2021-08-30 16:38:50,574 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 134.61ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-30 16:38:50,575 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.03ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:50,575 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 47 Invalid, 448 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [12 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 166.03ms Time] [2021-08-30 16:38:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-30 16:38:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-08-30 16:38:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 71 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:38:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-08-30 16:38:50,577 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 26 [2021-08-30 16:38:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:50,577 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-08-30 16:38:50,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-08-30 16:38:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-08-30 16:38:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 16:38:50,578 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:50,578 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 16:38:50,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-30 16:38:50,578 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:50,578 INFO L82 PathProgramCache]: Analyzing trace with hash 291333311, now seen corresponding path program 1 times [2021-08-30 16:38:50,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:50,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755957989] [2021-08-30 16:38:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:50,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:50,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:50,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:50,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755957989] [2021-08-30 16:38:50,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755957989] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:50,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:50,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-30 16:38:50,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121579973] [2021-08-30 16:38:50,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 16:38:50,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 16:38:50,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:38:50,690 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-08-30 16:38:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:50,921 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-08-30 16:38:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 16:38:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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 26 [2021-08-30 16:38:50,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:50,924 INFO L225 Difference]: With dead ends: 109 [2021-08-30 16:38:50,924 INFO L226 Difference]: Without dead ends: 109 [2021-08-30 16:38:50,924 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 144.91ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-30 16:38:50,926 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 68 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 132.56ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:50,928 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 386 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [15 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 132.56ms Time] [2021-08-30 16:38:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-30 16:38:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2021-08-30 16:38:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 16:38:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-08-30 16:38:50,933 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 26 [2021-08-30 16:38:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:50,933 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-08-30 16:38:50,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-08-30 16:38:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-08-30 16:38:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 16:38:50,935 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:50,935 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 16:38:50,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-30 16:38:50,935 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:50,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1397610431, now seen corresponding path program 1 times [2021-08-30 16:38:50,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:50,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763464490] [2021-08-30 16:38:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:50,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:51,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:51,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:51,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763464490] [2021-08-30 16:38:51,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763464490] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:51,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:51,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-30 16:38:51,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549691219] [2021-08-30 16:38:51,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 16:38:51,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:51,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 16:38:51,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:38:51,084 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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) [2021-08-30 16:38:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:51,332 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-08-30 16:38:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-30 16:38:51,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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 26 [2021-08-30 16:38:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:51,333 INFO L225 Difference]: With dead ends: 129 [2021-08-30 16:38:51,333 INFO L226 Difference]: Without dead ends: 129 [2021-08-30 16:38:51,333 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 142.26ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-08-30 16:38:51,334 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 100 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.56ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.65ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:51,335 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 39 Invalid, 410 Unknown, 0 Unchecked, 2.56ms Time], IncrementalHoareTripleChecker [19 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 159.65ms Time] [2021-08-30 16:38:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-30 16:38:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 92. [2021-08-30 16:38:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.1875) internal successors, (95), 84 states have internal predecessors, (95), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 16:38:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2021-08-30 16:38:51,338 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 26 [2021-08-30 16:38:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:51,338 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2021-08-30 16:38:51,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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) [2021-08-30 16:38:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2021-08-30 16:38:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 16:38:51,339 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:51,339 INFO L513 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] [2021-08-30 16:38:51,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-30 16:38:51,339 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:51,339 INFO L82 PathProgramCache]: Analyzing trace with hash 746415946, now seen corresponding path program 1 times [2021-08-30 16:38:51,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:51,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848038386] [2021-08-30 16:38:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:51,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:51,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:51,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-30 16:38:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:51,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:51,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848038386] [2021-08-30 16:38:51,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848038386] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:51,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:51,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:38:51,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940348372] [2021-08-30 16:38:51,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:38:51,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:38:51,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:38:51,423 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-08-30 16:38:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:51,479 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2021-08-30 16:38:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:38:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 28 [2021-08-30 16:38:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:51,480 INFO L225 Difference]: With dead ends: 91 [2021-08-30 16:38:51,480 INFO L226 Difference]: Without dead ends: 60 [2021-08-30 16:38:51,480 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.03ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:38:51,480 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.37ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.48ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:51,480 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 6 Invalid, 86 Unknown, 0 Unchecked, 0.37ms Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 53.48ms Time] [2021-08-30 16:38:51,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-30 16:38:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-30 16:38:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.150943396226415) internal successors, (61), 54 states have internal predecessors, (61), 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) [2021-08-30 16:38:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-08-30 16:38:51,483 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 28 [2021-08-30 16:38:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:51,483 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-08-30 16:38:51,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-08-30 16:38:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-08-30 16:38:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 16:38:51,483 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:51,484 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 16:38:51,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-30 16:38:51,484 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash -467898274, now seen corresponding path program 1 times [2021-08-30 16:38:51,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:51,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691158728] [2021-08-30 16:38:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:51,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:51,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:51,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:51,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691158728] [2021-08-30 16:38:51,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691158728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:51,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702659134] [2021-08-30 16:38:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:51,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:51,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:51,623 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) [2021-08-30 16:38:51,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 16:38:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:51,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-30 16:38:51,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:51,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:52,098 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 5 treesize of output 3 [2021-08-30 16:38:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:52,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702659134] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:52,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:52,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2021-08-30 16:38:52,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920518218] [2021-08-30 16:38:52,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-30 16:38:52,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:52,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-30 16:38:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-08-30 16:38:52,137 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 28 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:52,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:52,536 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-08-30 16:38:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 16:38:52,537 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-08-30 16:38:52,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:52,537 INFO L225 Difference]: With dead ends: 84 [2021-08-30 16:38:52,537 INFO L226 Difference]: Without dead ends: 84 [2021-08-30 16:38:52,538 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 422.78ms TimeCoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 16:38:52,538 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 159 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.86ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.90ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:52,538 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 58 Invalid, 634 Unknown, 0 Unchecked, 2.86ms Time], IncrementalHoareTripleChecker [27 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 225.90ms Time] [2021-08-30 16:38:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-30 16:38:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2021-08-30 16:38:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 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) [2021-08-30 16:38:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2021-08-30 16:38:52,540 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 30 [2021-08-30 16:38:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:52,540 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2021-08-30 16:38:52,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2021-08-30 16:38:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 16:38:52,541 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:52,541 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 16:38:52,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:52,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:52,749 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash -601913958, now seen corresponding path program 1 times [2021-08-30 16:38:52,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:52,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002006081] [2021-08-30 16:38:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:52,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:52,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:38:52,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:52,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002006081] [2021-08-30 16:38:52,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002006081] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:52,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:52,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-30 16:38:52,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529863951] [2021-08-30 16:38:52,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 16:38:52,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:52,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 16:38:52,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:38:52,879 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 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) [2021-08-30 16:38:53,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:53,097 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2021-08-30 16:38:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 16:38:53,098 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 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 30 [2021-08-30 16:38:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:53,098 INFO L225 Difference]: With dead ends: 100 [2021-08-30 16:38:53,098 INFO L226 Difference]: Without dead ends: 100 [2021-08-30 16:38:53,099 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 143.37ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-08-30 16:38:53,099 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 78 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.01ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:53,099 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 33 Invalid, 360 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [13 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 131.01ms Time] [2021-08-30 16:38:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-30 16:38:53,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2021-08-30 16:38:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 64 states have (on average 1.15625) internal successors, (74), 65 states have internal predecessors, (74), 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) [2021-08-30 16:38:53,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-08-30 16:38:53,101 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 30 [2021-08-30 16:38:53,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:53,101 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-08-30 16:38:53,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 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) [2021-08-30 16:38:53,101 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-08-30 16:38:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-30 16:38:53,101 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:53,101 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:53,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-30 16:38:53,102 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:53,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1610718345, now seen corresponding path program 1 times [2021-08-30 16:38:53,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:53,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199833793] [2021-08-30 16:38:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:53,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:53,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:38:53,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:53,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199833793] [2021-08-30 16:38:53,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199833793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:53,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176776524] [2021-08-30 16:38:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:53,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:53,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:53,221 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) [2021-08-30 16:38:53,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 16:38:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:53,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-30 16:38:53,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:53,329 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:38:53,329 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 [2021-08-30 16:38:53,331 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 [2021-08-30 16:38:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:38:53,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:38:53,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176776524] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:53,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:53,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2021-08-30 16:38:53,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221010467] [2021-08-30 16:38:53,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-30 16:38:53,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:53,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-30 16:38:53,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-30 16:38:53,775 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 26 states, 25 states have (on average 3.24) internal successors, (81), 22 states have internal predecessors, (81), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:54,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:54,239 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-08-30 16:38:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 16:38:54,240 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.24) internal successors, (81), 22 states have internal predecessors, (81), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-08-30 16:38:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:54,240 INFO L225 Difference]: With dead ends: 92 [2021-08-30 16:38:54,240 INFO L226 Difference]: Without dead ends: 92 [2021-08-30 16:38:54,241 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 406.56ms TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 16:38:54,241 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 108 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 235.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 287.92ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:54,241 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 58 Invalid, 864 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [17 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 287.92ms Time] [2021-08-30 16:38:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-30 16:38:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-08-30 16:38:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 80 states have internal predecessors, (92), 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) [2021-08-30 16:38:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2021-08-30 16:38:54,243 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 34 [2021-08-30 16:38:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:54,243 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2021-08-30 16:38:54,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.24) internal successors, (81), 22 states have internal predecessors, (81), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2021-08-30 16:38:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 16:38:54,244 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:54,244 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 16:38:54,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:54,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:54,453 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash 234852129, now seen corresponding path program 2 times [2021-08-30 16:38:54,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:54,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480849810] [2021-08-30 16:38:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:54,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:54,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:54,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:54,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480849810] [2021-08-30 16:38:54,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480849810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:54,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235276299] [2021-08-30 16:38:54,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:38:54,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:54,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:54,649 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) [2021-08-30 16:38:54,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 16:38:54,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:38:54,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-30 16:38:54,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:54,817 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 21 treesize of output 17 [2021-08-30 16:38:55,043 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-08-30 16:38:55,043 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 [2021-08-30 16:38:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:55,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:55,178 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 13 [2021-08-30 16:38:55,179 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 26 treesize of output 22 [2021-08-30 16:38:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:55,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235276299] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:55,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:55,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 35 [2021-08-30 16:38:55,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812079574] [2021-08-30 16:38:55,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-30 16:38:55,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-30 16:38:55,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-08-30 16:38:55,287 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 35 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:55,731 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2021-08-30 16:38:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 16:38:55,732 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-08-30 16:38:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:55,732 INFO L225 Difference]: With dead ends: 135 [2021-08-30 16:38:55,733 INFO L226 Difference]: Without dead ends: 115 [2021-08-30 16:38:55,733 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 628.71ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-08-30 16:38:55,734 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 88 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 171.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 208.10ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:55,734 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 76 Invalid, 813 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [14 Valid, 634 Invalid, 0 Unknown, 165 Unchecked, 208.10ms Time] [2021-08-30 16:38:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-30 16:38:55,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2021-08-30 16:38:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 99 states have internal predecessors, (112), 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) [2021-08-30 16:38:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-08-30 16:38:55,736 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 35 [2021-08-30 16:38:55,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:55,736 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-08-30 16:38:55,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:55,736 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-08-30 16:38:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-30 16:38:55,736 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:55,736 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-08-30 16:38:55,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:55,944 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,SelfDestructingSolverStorable21 [2021-08-30 16:38:55,945 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:55,945 INFO L82 PathProgramCache]: Analyzing trace with hash -503834716, now seen corresponding path program 3 times [2021-08-30 16:38:55,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:55,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175230951] [2021-08-30 16:38:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:55,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:56,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:56,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:56,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175230951] [2021-08-30 16:38:56,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175230951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:56,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561986013] [2021-08-30 16:38:56,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:38:56,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:56,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:56,088 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) [2021-08-30 16:38:56,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 16:38:56,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-30 16:38:56,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-30 16:38:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:56,200 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:38:56,200 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 [2021-08-30 16:38:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:56,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:56,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561986013] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:56,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:56,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2021-08-30 16:38:56,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503957308] [2021-08-30 16:38:56,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-30 16:38:56,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:56,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-30 16:38:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-30 16:38:56,861 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 37 states, 35 states have (on average 2.742857142857143) internal successors, (96), 33 states have internal predecessors, (96), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:57,365 INFO L93 Difference]: Finished difference Result 158 states and 174 transitions. [2021-08-30 16:38:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 16:38:57,366 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.742857142857143) internal successors, (96), 33 states have internal predecessors, (96), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-08-30 16:38:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:57,367 INFO L225 Difference]: With dead ends: 158 [2021-08-30 16:38:57,367 INFO L226 Difference]: Without dead ends: 158 [2021-08-30 16:38:57,367 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 636.75ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-08-30 16:38:57,368 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 229 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 265.21ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:57,368 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 44 Invalid, 752 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [33 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 265.21ms Time] [2021-08-30 16:38:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-30 16:38:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2021-08-30 16:38:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 131 states have internal predecessors, (150), 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) [2021-08-30 16:38:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 156 transitions. [2021-08-30 16:38:57,371 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 156 transitions. Word has length 39 [2021-08-30 16:38:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:57,371 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 156 transitions. [2021-08-30 16:38:57,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.742857142857143) internal successors, (96), 33 states have internal predecessors, (96), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 156 transitions. [2021-08-30 16:38:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-30 16:38:57,371 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:57,371 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-08-30 16:38:57,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:57,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:57,581 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:38:57,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:57,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2004165246, now seen corresponding path program 2 times [2021-08-30 16:38:57,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:57,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848882070] [2021-08-30 16:38:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:57,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:57,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:38:57,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:57,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848882070] [2021-08-30 16:38:57,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848882070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:57,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847179069] [2021-08-30 16:38:57,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:38:57,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:57,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:57,832 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) [2021-08-30 16:38:57,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 16:38:57,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:38:57,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:57,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-30 16:38:57,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:57,927 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 [2021-08-30 16:38:58,053 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 [2021-08-30 16:38:58,089 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:38:58,089 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 [2021-08-30 16:38:58,421 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:38:58,422 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 [2021-08-30 16:38:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:38:58,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:59,123 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (= 0 (select (select (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)) c_main_~nondetString1~0.base) (+ c_main_~nondetString1~0.offset 1)))) is different from false [2021-08-30 16:38:59,128 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 56 treesize of output 50 [2021-08-30 16:38:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:38:59,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847179069] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:59,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:59,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2021-08-30 16:38:59,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76666909] [2021-08-30 16:38:59,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-30 16:38:59,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:59,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-30 16:38:59,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1151, Unknown=1, NotChecked=68, Total=1332 [2021-08-30 16:38:59,269 INFO L87 Difference]: Start difference. First operand 138 states and 156 transitions. Second operand has 37 states, 35 states have (on average 2.6) internal successors, (91), 33 states have internal predecessors, (91), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:01,840 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2021-08-30 16:39:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 16:39:01,841 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.6) internal successors, (91), 33 states have internal predecessors, (91), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-08-30 16:39:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:01,842 INFO L225 Difference]: With dead ends: 218 [2021-08-30 16:39:01,842 INFO L226 Difference]: Without dead ends: 218 [2021-08-30 16:39:01,843 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3367.42ms TimeCoverageRelationStatistics Valid=212, Invalid=2239, Unknown=3, NotChecked=96, Total=2550 [2021-08-30 16:39:01,843 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 104 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.98ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 253.09ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:01,843 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 88 Invalid, 1093 Unknown, 0 Unchecked, 3.98ms Time], IncrementalHoareTripleChecker [14 Valid, 784 Invalid, 0 Unknown, 295 Unchecked, 253.09ms Time] [2021-08-30 16:39:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-30 16:39:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 179. [2021-08-30 16:39:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 170 states have internal predecessors, (193), 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) [2021-08-30 16:39:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-08-30 16:39:01,849 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 42 [2021-08-30 16:39:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:01,849 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-08-30 16:39:01,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.6) internal successors, (91), 33 states have internal predecessors, (91), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-08-30 16:39:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-30 16:39:01,853 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:01,854 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-08-30 16:39:01,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:02,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:02,065 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:02,066 INFO L82 PathProgramCache]: Analyzing trace with hash -238582885, now seen corresponding path program 4 times [2021-08-30 16:39:02,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:02,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258431664] [2021-08-30 16:39:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:02,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:02,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:39:02,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:02,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258431664] [2021-08-30 16:39:02,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258431664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:02,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688832149] [2021-08-30 16:39:02,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:39:02,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:02,253 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) [2021-08-30 16:39:02,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-30 16:39:02,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:39:02,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:02,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-30 16:39:02,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:02,418 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:39:02,418 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 [2021-08-30 16:39:02,577 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 [2021-08-30 16:39:02,815 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-30 16:39:02,815 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 34 treesize of output 25 [2021-08-30 16:39:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:39:02,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:03,234 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 24 treesize of output 22 [2021-08-30 16:39:03,236 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 30 treesize of output 28 [2021-08-30 16:39:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:39:03,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688832149] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:03,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:03,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 45 [2021-08-30 16:39:03,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127285478] [2021-08-30 16:39:03,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-30 16:39:03,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:03,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-30 16:39:03,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1828, Unknown=0, NotChecked=0, Total=1980 [2021-08-30 16:39:03,559 INFO L87 Difference]: Start difference. First operand 179 states and 201 transitions. Second operand has 45 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:05,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:05,077 INFO L93 Difference]: Finished difference Result 306 states and 330 transitions. [2021-08-30 16:39:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-30 16:39:05,077 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-08-30 16:39:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:05,078 INFO L225 Difference]: With dead ends: 306 [2021-08-30 16:39:05,078 INFO L226 Difference]: Without dead ends: 269 [2021-08-30 16:39:05,080 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1686.24ms TimeCoverageRelationStatistics Valid=656, Invalid=5196, Unknown=0, NotChecked=0, Total=5852 [2021-08-30 16:39:05,080 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 245 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 425.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.42ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 557.08ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:05,080 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 121 Invalid, 2088 Unknown, 0 Unchecked, 5.42ms Time], IncrementalHoareTripleChecker [52 Valid, 1676 Invalid, 0 Unknown, 360 Unchecked, 557.08ms Time] [2021-08-30 16:39:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-30 16:39:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 245. [2021-08-30 16:39:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 233 states have (on average 1.1201716738197425) internal successors, (261), 234 states have internal predecessors, (261), 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) [2021-08-30 16:39:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2021-08-30 16:39:05,097 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 44 [2021-08-30 16:39:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:05,097 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2021-08-30 16:39:05,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2021-08-30 16:39:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-30 16:39:05,098 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:05,098 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-08-30 16:39:05,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-30 16:39:05,311 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,SelfDestructingSolverStorable24 [2021-08-30 16:39:05,311 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:05,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1931663327, now seen corresponding path program 3 times [2021-08-30 16:39:05,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:05,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063288709] [2021-08-30 16:39:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:05,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:05,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:05,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:05,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063288709] [2021-08-30 16:39:05,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063288709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:05,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966880607] [2021-08-30 16:39:05,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:39:05,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:05,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:05,455 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) [2021-08-30 16:39:05,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 16:39:05,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-30 16:39:05,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-30 16:39:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:05,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:05,954 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 21 treesize of output 17 [2021-08-30 16:39:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:06,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966880607] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:06,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:06,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2021-08-30 16:39:06,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998383275] [2021-08-30 16:39:06,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-30 16:39:06,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-30 16:39:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-30 16:39:06,099 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 28 states, 27 states have (on average 3.740740740740741) internal successors, (101), 24 states have internal predecessors, (101), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:06,639 INFO L93 Difference]: Finished difference Result 356 states and 395 transitions. [2021-08-30 16:39:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-30 16:39:06,639 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.740740740740741) internal successors, (101), 24 states have internal predecessors, (101), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-08-30 16:39:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:06,644 INFO L225 Difference]: With dead ends: 356 [2021-08-30 16:39:06,645 INFO L226 Difference]: Without dead ends: 356 [2021-08-30 16:39:06,645 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 396.46ms TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2021-08-30 16:39:06,647 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 93 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 318.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 401.09ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:06,648 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 107 Invalid, 1511 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [12 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 401.09ms Time] [2021-08-30 16:39:06,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-08-30 16:39:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 291. [2021-08-30 16:39:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 279 states have (on average 1.125448028673835) internal successors, (314), 280 states have internal predecessors, (314), 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) [2021-08-30 16:39:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 324 transitions. [2021-08-30 16:39:06,678 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 324 transitions. Word has length 46 [2021-08-30 16:39:06,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:06,678 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 324 transitions. [2021-08-30 16:39:06,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.740740740740741) internal successors, (101), 24 states have internal predecessors, (101), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 324 transitions. [2021-08-30 16:39:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-30 16:39:06,679 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:06,680 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 1] [2021-08-30 16:39:06,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:06,880 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,SelfDestructingSolverStorable25 [2021-08-30 16:39:06,881 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:06,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1063866053, now seen corresponding path program 1 times [2021-08-30 16:39:06,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:06,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560510354] [2021-08-30 16:39:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:06,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:07,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:39:07,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:07,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560510354] [2021-08-30 16:39:07,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560510354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:07,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673890303] [2021-08-30 16:39:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:07,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:07,081 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) [2021-08-30 16:39:07,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-30 16:39:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:07,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-30 16:39:07,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:07,254 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 [2021-08-30 16:39:07,605 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-08-30 16:39:07,606 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 34 treesize of output 20 [2021-08-30 16:39:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:39:07,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:07,905 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 29 treesize of output 25 [2021-08-30 16:39:07,908 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-30 16:39:07,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2021-08-30 16:39:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:39:08,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673890303] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:08,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:08,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2021-08-30 16:39:08,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025284526] [2021-08-30 16:39:08,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-30 16:39:08,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-30 16:39:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2021-08-30 16:39:08,067 INFO L87 Difference]: Start difference. First operand 291 states and 324 transitions. Second operand has 43 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:08,781 INFO L93 Difference]: Finished difference Result 287 states and 314 transitions. [2021-08-30 16:39:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-30 16:39:08,782 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-08-30 16:39:08,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:08,783 INFO L225 Difference]: With dead ends: 287 [2021-08-30 16:39:08,783 INFO L226 Difference]: Without dead ends: 255 [2021-08-30 16:39:08,783 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1089.95ms TimeCoverageRelationStatistics Valid=354, Invalid=2951, Unknown=1, NotChecked=0, Total=3306 [2021-08-30 16:39:08,784 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 96 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 232.24ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:08,784 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 79 Invalid, 920 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [17 Valid, 669 Invalid, 0 Unknown, 234 Unchecked, 232.24ms Time] [2021-08-30 16:39:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-30 16:39:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2021-08-30 16:39:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 243 states have (on average 1.123456790123457) internal successors, (273), 244 states have internal predecessors, (273), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 282 transitions. [2021-08-30 16:39:08,787 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 282 transitions. Word has length 47 [2021-08-30 16:39:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:08,787 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 282 transitions. [2021-08-30 16:39:08,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 282 transitions. [2021-08-30 16:39:08,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-30 16:39:08,788 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:08,788 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-08-30 16:39:08,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:08,996 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,SelfDestructingSolverStorable26 [2021-08-30 16:39:08,997 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:08,997 INFO L82 PathProgramCache]: Analyzing trace with hash 444391032, now seen corresponding path program 5 times [2021-08-30 16:39:08,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:08,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47053205] [2021-08-30 16:39:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:08,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:09,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:39:09,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:09,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47053205] [2021-08-30 16:39:09,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47053205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:09,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243906017] [2021-08-30 16:39:09,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:39:09,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:09,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:09,170 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) [2021-08-30 16:39:09,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-30 16:39:09,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-30 16:39:09,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:09,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-30 16:39:09,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:09,271 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:39:09,272 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 [2021-08-30 16:39:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:39:09,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:39:09,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243906017] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:09,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:09,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 33 [2021-08-30 16:39:09,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805841844] [2021-08-30 16:39:09,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-30 16:39:09,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-30 16:39:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-08-30 16:39:09,942 INFO L87 Difference]: Start difference. First operand 254 states and 282 transitions. Second operand has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 31 states have internal predecessors, (113), 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) [2021-08-30 16:39:10,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:10,570 INFO L93 Difference]: Finished difference Result 313 states and 343 transitions. [2021-08-30 16:39:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-30 16:39:10,571 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 31 states have internal predecessors, (113), 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 48 [2021-08-30 16:39:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:10,572 INFO L225 Difference]: With dead ends: 313 [2021-08-30 16:39:10,572 INFO L226 Difference]: Without dead ends: 313 [2021-08-30 16:39:10,572 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 650.49ms TimeCoverageRelationStatistics Valid=303, Invalid=1953, Unknown=0, NotChecked=0, Total=2256 [2021-08-30 16:39:10,573 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 202 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 280.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 336.75ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:10,573 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 47 Invalid, 974 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [31 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 336.75ms Time] [2021-08-30 16:39:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-30 16:39:10,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 274. [2021-08-30 16:39:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 263 states have (on average 1.1254752851711027) internal successors, (296), 264 states have internal predecessors, (296), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 305 transitions. [2021-08-30 16:39:10,577 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 305 transitions. Word has length 48 [2021-08-30 16:39:10,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:10,577 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 305 transitions. [2021-08-30 16:39:10,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 31 states have internal predecessors, (113), 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) [2021-08-30 16:39:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 305 transitions. [2021-08-30 16:39:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-30 16:39:10,578 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:10,578 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-08-30 16:39:10,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:10,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-30 16:39:10,789 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -257491982, now seen corresponding path program 1 times [2021-08-30 16:39:10,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:10,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446117271] [2021-08-30 16:39:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:10,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:11,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:39:11,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:11,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446117271] [2021-08-30 16:39:11,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446117271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:11,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116798070] [2021-08-30 16:39:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:11,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:11,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:11,045 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) [2021-08-30 16:39:11,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-30 16:39:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-30 16:39:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:11,293 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 [2021-08-30 16:39:11,332 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:39:11,332 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 31 treesize of output 30 [2021-08-30 16:39:11,493 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 [2021-08-30 16:39:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:39:11,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:11,700 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 13 [2021-08-30 16:39:11,711 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 26 treesize of output 22 [2021-08-30 16:39:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:39:11,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116798070] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:11,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:11,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2021-08-30 16:39:11,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606467035] [2021-08-30 16:39:11,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-30 16:39:11,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:11,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-30 16:39:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-08-30 16:39:11,863 INFO L87 Difference]: Start difference. First operand 274 states and 305 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 30 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:12,583 INFO L93 Difference]: Finished difference Result 364 states and 398 transitions. [2021-08-30 16:39:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 16:39:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 30 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-30 16:39:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:12,584 INFO L225 Difference]: With dead ends: 364 [2021-08-30 16:39:12,585 INFO L226 Difference]: Without dead ends: 334 [2021-08-30 16:39:12,585 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 717.42ms TimeCoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2021-08-30 16:39:12,585 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 133 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 359.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.67ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 431.95ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:12,585 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 91 Invalid, 1328 Unknown, 0 Unchecked, 2.67ms Time], IncrementalHoareTripleChecker [21 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 431.95ms Time] [2021-08-30 16:39:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-30 16:39:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 279. [2021-08-30 16:39:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 269 states have (on average 1.1338289962825279) internal successors, (305), 270 states have internal predecessors, (305), 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) [2021-08-30 16:39:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 313 transitions. [2021-08-30 16:39:12,589 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 313 transitions. Word has length 51 [2021-08-30 16:39:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:12,589 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 313 transitions. [2021-08-30 16:39:12,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 30 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 313 transitions. [2021-08-30 16:39:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-30 16:39:12,590 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:12,590 INFO L513 BasicCegarLoop]: trace histogram [5, 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] [2021-08-30 16:39:12,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-30 16:39:12,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-30 16:39:12,791 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:12,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:12,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1257119417, now seen corresponding path program 6 times [2021-08-30 16:39:12,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:12,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127015173] [2021-08-30 16:39:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:12,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:13,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:39:13,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:13,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127015173] [2021-08-30 16:39:13,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127015173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:13,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072141857] [2021-08-30 16:39:13,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:39:13,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:13,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:13,029 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) [2021-08-30 16:39:13,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-30 16:39:13,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-30 16:39:13,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:13,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-30 16:39:13,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:13,143 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:39:13,143 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 [2021-08-30 16:39:13,205 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 [2021-08-30 16:39:13,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:39:13,412 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 21 treesize of output 21 [2021-08-30 16:39:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:39:13,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:14,484 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 39 treesize of output 37 [2021-08-30 16:39:14,486 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 45 treesize of output 43 [2021-08-30 16:39:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:39:14,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072141857] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:14,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:14,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2021-08-30 16:39:14,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090217486] [2021-08-30 16:39:14,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-30 16:39:14,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:14,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-30 16:39:14,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2004, Unknown=0, NotChecked=0, Total=2162 [2021-08-30 16:39:14,812 INFO L87 Difference]: Start difference. First operand 279 states and 313 transitions. Second operand has 47 states, 44 states have (on average 2.772727272727273) internal successors, (122), 43 states have internal predecessors, (122), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:17,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:17,558 INFO L93 Difference]: Finished difference Result 523 states and 564 transitions. [2021-08-30 16:39:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-30 16:39:17,558 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 2.772727272727273) internal successors, (122), 43 states have internal predecessors, (122), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-08-30 16:39:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:17,559 INFO L225 Difference]: With dead ends: 523 [2021-08-30 16:39:17,560 INFO L226 Difference]: Without dead ends: 376 [2021-08-30 16:39:17,562 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2951 ImplicationChecksByTransitivity, 2789.29ms TimeCoverageRelationStatistics Valid=1158, Invalid=10614, Unknown=0, NotChecked=0, Total=11772 [2021-08-30 16:39:17,562 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 272 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 590.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.23ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 709.49ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:17,562 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 112 Invalid, 2691 Unknown, 0 Unchecked, 5.23ms Time], IncrementalHoareTripleChecker [68 Valid, 2201 Invalid, 0 Unknown, 422 Unchecked, 709.49ms Time] [2021-08-30 16:39:17,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-08-30 16:39:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 292. [2021-08-30 16:39:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 282 states have (on average 1.1170212765957446) internal successors, (315), 283 states have internal predecessors, (315), 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) [2021-08-30 16:39:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 323 transitions. [2021-08-30 16:39:17,567 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 323 transitions. Word has length 53 [2021-08-30 16:39:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:17,567 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 323 transitions. [2021-08-30 16:39:17,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 2.772727272727273) internal successors, (122), 43 states have internal predecessors, (122), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 323 transitions. [2021-08-30 16:39:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-30 16:39:17,568 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:17,568 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-08-30 16:39:17,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:17,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:17,769 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:17,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:17,770 INFO L82 PathProgramCache]: Analyzing trace with hash 902326762, now seen corresponding path program 4 times [2021-08-30 16:39:17,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:17,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207947139] [2021-08-30 16:39:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:17,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:18,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:39:18,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:18,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207947139] [2021-08-30 16:39:18,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207947139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:18,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685670603] [2021-08-30 16:39:18,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:39:18,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:18,305 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) [2021-08-30 16:39:18,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-30 16:39:18,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:39:18,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:18,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-30 16:39:18,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:18,451 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:39:18,451 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 [2021-08-30 16:39:18,461 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 [2021-08-30 16:39:18,728 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 16 treesize of output 12 [2021-08-30 16:39:18,775 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:39:18,775 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 33 treesize of output 32 [2021-08-30 16:39:19,347 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 16:39:19,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-08-30 16:39:19,354 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:39:19,355 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 48 treesize of output 33 [2021-08-30 16:39:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:19,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:20,958 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 58 treesize of output 54 [2021-08-30 16:39:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:21,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685670603] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:21,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:21,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16, 16] total 55 [2021-08-30 16:39:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672930376] [2021-08-30 16:39:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-30 16:39:21,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-30 16:39:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2805, Unknown=1, NotChecked=0, Total=2970 [2021-08-30 16:39:21,344 INFO L87 Difference]: Start difference. First operand 292 states and 323 transitions. Second operand has 55 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 51 states have internal predecessors, (132), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:23,302 INFO L93 Difference]: Finished difference Result 442 states and 484 transitions. [2021-08-30 16:39:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-30 16:39:23,303 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 51 states have internal predecessors, (132), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-08-30 16:39:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:23,304 INFO L225 Difference]: With dead ends: 442 [2021-08-30 16:39:23,304 INFO L226 Difference]: Without dead ends: 414 [2021-08-30 16:39:23,305 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 3806.02ms TimeCoverageRelationStatistics Valid=601, Invalid=7588, Unknown=1, NotChecked=0, Total=8190 [2021-08-30 16:39:23,306 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 120 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 347.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.01ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 413.95ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:23,306 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 142 Invalid, 1466 Unknown, 0 Unchecked, 3.01ms Time], IncrementalHoareTripleChecker [40 Valid, 1140 Invalid, 0 Unknown, 286 Unchecked, 413.95ms Time] [2021-08-30 16:39:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-30 16:39:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 398. [2021-08-30 16:39:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 385 states have (on average 1.1116883116883116) internal successors, (428), 386 states have internal predecessors, (428), 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) [2021-08-30 16:39:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 439 transitions. [2021-08-30 16:39:23,314 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 439 transitions. Word has length 54 [2021-08-30 16:39:23,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:23,315 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 439 transitions. [2021-08-30 16:39:23,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 51 states have internal predecessors, (132), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:23,315 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 439 transitions. [2021-08-30 16:39:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-30 16:39:23,316 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:23,316 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-08-30 16:39:23,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:23,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:23,529 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:23,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:23,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1882013497, now seen corresponding path program 5 times [2021-08-30 16:39:23,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:23,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949662113] [2021-08-30 16:39:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:23,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:23,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:23,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:23,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949662113] [2021-08-30 16:39:23,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949662113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:23,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539174966] [2021-08-30 16:39:23,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:39:23,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:23,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:23,692 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) [2021-08-30 16:39:23,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-30 16:39:23,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-30 16:39:23,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:23,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-30 16:39:23,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:24,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:24,266 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 7 treesize of output 5 [2021-08-30 16:39:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539174966] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:24,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:24,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2021-08-30 16:39:24,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288084083] [2021-08-30 16:39:24,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-30 16:39:24,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:24,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-30 16:39:24,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-08-30 16:39:24,325 INFO L87 Difference]: Start difference. First operand 398 states and 439 transitions. Second operand has 35 states, 34 states have (on average 3.911764705882353) internal successors, (133), 31 states have internal predecessors, (133), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:25,051 INFO L93 Difference]: Finished difference Result 608 states and 674 transitions. [2021-08-30 16:39:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 16:39:25,051 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.911764705882353) internal successors, (133), 31 states have internal predecessors, (133), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-08-30 16:39:25,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:25,053 INFO L225 Difference]: With dead ends: 608 [2021-08-30 16:39:25,053 INFO L226 Difference]: Without dead ends: 608 [2021-08-30 16:39:25,053 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 607.91ms TimeCoverageRelationStatistics Valid=284, Invalid=1972, Unknown=0, NotChecked=0, Total=2256 [2021-08-30 16:39:25,053 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 199 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 374.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 450.25ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:25,053 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 65 Invalid, 1328 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [26 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 450.25ms Time] [2021-08-30 16:39:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-08-30 16:39:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 467. [2021-08-30 16:39:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 454 states have (on average 1.1145374449339207) internal successors, (506), 455 states have internal predecessors, (506), 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) [2021-08-30 16:39:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 517 transitions. [2021-08-30 16:39:25,060 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 517 transitions. Word has length 58 [2021-08-30 16:39:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:25,061 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 517 transitions. [2021-08-30 16:39:25,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.911764705882353) internal successors, (133), 31 states have internal predecessors, (133), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 517 transitions. [2021-08-30 16:39:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-30 16:39:25,062 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:25,062 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-08-30 16:39:25,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-30 16:39:25,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:25,278 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:25,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1413841964, now seen corresponding path program 2 times [2021-08-30 16:39:25,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:25,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433935536] [2021-08-30 16:39:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:25,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:25,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:39:25,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:25,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433935536] [2021-08-30 16:39:25,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433935536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:25,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293028029] [2021-08-30 16:39:25,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:39:25,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:25,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:25,494 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) [2021-08-30 16:39:25,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-30 16:39:25,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:39:25,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-30 16:39:25,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:25,607 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 [2021-08-30 16:39:25,750 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 [2021-08-30 16:39:25,783 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:39:25,783 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 [2021-08-30 16:39:26,357 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:39:26,357 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 [2021-08-30 16:39:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:39:26,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:32,704 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 13 [2021-08-30 16:39:32,705 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 26 treesize of output 22 [2021-08-30 16:39:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:39:32,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293028029] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:32,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:32,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 39 [2021-08-30 16:39:32,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301766248] [2021-08-30 16:39:32,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-30 16:39:32,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:32,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-30 16:39:32,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2021-08-30 16:39:32,890 INFO L87 Difference]: Start difference. First operand 467 states and 517 transitions. Second operand has 39 states, 38 states have (on average 2.973684210526316) internal successors, (113), 35 states have internal predecessors, (113), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:33,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:33,317 INFO L93 Difference]: Finished difference Result 503 states and 551 transitions. [2021-08-30 16:39:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-30 16:39:33,317 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.973684210526316) internal successors, (113), 35 states have internal predecessors, (113), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-08-30 16:39:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:33,318 INFO L225 Difference]: With dead ends: 503 [2021-08-30 16:39:33,318 INFO L226 Difference]: Without dead ends: 472 [2021-08-30 16:39:33,319 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 7042.86ms TimeCoverageRelationStatistics Valid=190, Invalid=2066, Unknown=0, NotChecked=0, Total=2256 [2021-08-30 16:39:33,319 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 163.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 197.75ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:33,319 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 793 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [11 Valid, 600 Invalid, 0 Unknown, 182 Unchecked, 197.75ms Time] [2021-08-30 16:39:33,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-30 16:39:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 443. [2021-08-30 16:39:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 430 states have (on average 1.1162790697674418) internal successors, (480), 431 states have internal predecessors, (480), 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) [2021-08-30 16:39:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 491 transitions. [2021-08-30 16:39:33,325 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 491 transitions. Word has length 63 [2021-08-30 16:39:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:33,325 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 491 transitions. [2021-08-30 16:39:33,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.973684210526316) internal successors, (113), 35 states have internal predecessors, (113), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 491 transitions. [2021-08-30 16:39:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-30 16:39:33,326 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:33,326 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-08-30 16:39:33,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:33,543 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,SelfDestructingSolverStorable32 [2021-08-30 16:39:33,543 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:33,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1715807242, now seen corresponding path program 3 times [2021-08-30 16:39:33,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:33,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919232228] [2021-08-30 16:39:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:33,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:33,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:39:33,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:33,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919232228] [2021-08-30 16:39:33,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919232228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:33,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730671641] [2021-08-30 16:39:33,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:39:33,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:33,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:33,910 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) [2021-08-30 16:39:33,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-30 16:39:34,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-30 16:39:34,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-30 16:39:34,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:34,022 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 [2021-08-30 16:39:34,218 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 [2021-08-30 16:39:34,269 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:39:34,270 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 [2021-08-30 16:39:34,870 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:39:34,871 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 [2021-08-30 16:39:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:39:34,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:39,323 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 13 [2021-08-30 16:39:39,324 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 26 treesize of output 22 [2021-08-30 16:39:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:39:39,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730671641] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:39,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:39,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 16] total 50 [2021-08-30 16:39:39,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190687524] [2021-08-30 16:39:39,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-30 16:39:39,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-30 16:39:39,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 16:39:39,542 INFO L87 Difference]: Start difference. First operand 443 states and 491 transitions. Second operand has 50 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 46 states have internal predecessors, (135), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:40,779 INFO L93 Difference]: Finished difference Result 575 states and 627 transitions. [2021-08-30 16:39:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-30 16:39:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 46 states have internal predecessors, (135), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-08-30 16:39:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:40,780 INFO L225 Difference]: With dead ends: 575 [2021-08-30 16:39:40,780 INFO L226 Difference]: Without dead ends: 513 [2021-08-30 16:39:40,781 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 5901.53ms TimeCoverageRelationStatistics Valid=323, Invalid=5227, Unknown=0, NotChecked=0, Total=5550 [2021-08-30 16:39:40,781 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 69 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 357.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.42ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 437.17ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:40,781 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 137 Invalid, 1696 Unknown, 0 Unchecked, 3.42ms Time], IncrementalHoareTripleChecker [14 Valid, 1353 Invalid, 0 Unknown, 329 Unchecked, 437.17ms Time] [2021-08-30 16:39:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-30 16:39:40,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 444. [2021-08-30 16:39:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 431 states have (on average 1.1206496519721578) internal successors, (483), 432 states have internal predecessors, (483), 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) [2021-08-30 16:39:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 494 transitions. [2021-08-30 16:39:40,787 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 494 transitions. Word has length 63 [2021-08-30 16:39:40,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:40,788 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 494 transitions. [2021-08-30 16:39:40,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.7551020408163267) internal successors, (135), 46 states have internal predecessors, (135), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 494 transitions. [2021-08-30 16:39:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-30 16:39:40,789 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:40,789 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-08-30 16:39:40,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:41,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:41,006 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash 639055424, now seen corresponding path program 4 times [2021-08-30 16:39:41,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:41,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792756747] [2021-08-30 16:39:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:41,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:41,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:39:41,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:41,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792756747] [2021-08-30 16:39:41,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792756747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:41,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516310021] [2021-08-30 16:39:41,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:39:41,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:41,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:41,310 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) [2021-08-30 16:39:41,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-30 16:39:41,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:39:41,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:41,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-30 16:39:41,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:41,419 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:39:41,419 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 [2021-08-30 16:39:41,434 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 [2021-08-30 16:39:41,677 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 [2021-08-30 16:39:41,713 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-08-30 16:39:41,713 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 32 treesize of output 31 [2021-08-30 16:39:42,219 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 16:39:42,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2021-08-30 16:39:42,226 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-08-30 16:39:42,226 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 42 treesize of output 28 [2021-08-30 16:39:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:39:42,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:44,114 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 56 treesize of output 52 [2021-08-30 16:39:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:39:44,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516310021] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:44,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:44,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 52 [2021-08-30 16:39:44,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809619931] [2021-08-30 16:39:44,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-30 16:39:44,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-30 16:39:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2497, Unknown=2, NotChecked=0, Total=2652 [2021-08-30 16:39:44,443 INFO L87 Difference]: Start difference. First operand 444 states and 494 transitions. Second operand has 52 states, 50 states have (on average 2.7) internal successors, (135), 48 states have internal predecessors, (135), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:48,330 INFO L93 Difference]: Finished difference Result 646 states and 717 transitions. [2021-08-30 16:39:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-30 16:39:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 2.7) internal successors, (135), 48 states have internal predecessors, (135), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-08-30 16:39:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:48,332 INFO L225 Difference]: With dead ends: 646 [2021-08-30 16:39:48,332 INFO L226 Difference]: Without dead ends: 646 [2021-08-30 16:39:48,333 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 5795.06ms TimeCoverageRelationStatistics Valid=635, Invalid=7373, Unknown=2, NotChecked=0, Total=8010 [2021-08-30 16:39:48,333 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 124 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 301.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.85ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 940 IncrementalHoareTripleChecker+Unchecked, 361.21ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:48,333 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 129 Invalid, 2068 Unknown, 0 Unchecked, 2.85ms Time], IncrementalHoareTripleChecker [20 Valid, 1108 Invalid, 0 Unknown, 940 Unchecked, 361.21ms Time] [2021-08-30 16:39:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-08-30 16:39:48,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 607. [2021-08-30 16:39:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 594 states have (on average 1.1262626262626263) internal successors, (669), 595 states have internal predecessors, (669), 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) [2021-08-30 16:39:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 680 transitions. [2021-08-30 16:39:48,340 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 680 transitions. Word has length 63 [2021-08-30 16:39:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:48,340 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 680 transitions. [2021-08-30 16:39:48,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 2.7) internal successors, (135), 48 states have internal predecessors, (135), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 680 transitions. [2021-08-30 16:39:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-30 16:39:48,341 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:48,341 INFO L513 BasicCegarLoop]: trace histogram [5, 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] [2021-08-30 16:39:48,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:48,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:48,542 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1777014062, now seen corresponding path program 6 times [2021-08-30 16:39:48,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:48,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605482726] [2021-08-30 16:39:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:48,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:48,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:48,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:48,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605482726] [2021-08-30 16:39:48,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605482726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:48,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111228129] [2021-08-30 16:39:48,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:39:48,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:48,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:48,973 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) [2021-08-30 16:39:48,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-30 16:39:49,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-30 16:39:49,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:49,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 140 conjunts are in the unsatisfiable core [2021-08-30 16:39:49,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:49,137 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 [2021-08-30 16:39:49,474 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 [2021-08-30 16:39:49,509 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 [2021-08-30 16:39:51,780 INFO L354 Elim1Store]: treesize reduction 101, result has 10.6 percent of original size [2021-08-30 16:39:51,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 44 [2021-08-30 16:39:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:51,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:53,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:39:53,986 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 211 treesize of output 199 [2021-08-30 16:39:54,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:39:54,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:39:54,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:39:54,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 97 [2021-08-30 16:39:54,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:39:54,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:39:54,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:39:54,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:39:54,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 138 [2021-08-30 16:39:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:39:54,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111228129] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:54,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:54,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 38, 37] total 97 [2021-08-30 16:39:54,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300188400] [2021-08-30 16:39:54,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-08-30 16:39:54,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-08-30 16:39:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=8707, Unknown=0, NotChecked=0, Total=9312 [2021-08-30 16:39:54,993 INFO L87 Difference]: Start difference. First operand 607 states and 680 transitions. Second operand has 97 states, 96 states have (on average 1.7916666666666667) internal successors, (172), 93 states have internal predecessors, (172), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:59,389 INFO L93 Difference]: Finished difference Result 857 states and 941 transitions. [2021-08-30 16:39:59,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-30 16:39:59,390 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 1.7916666666666667) internal successors, (172), 93 states have internal predecessors, (172), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-08-30 16:39:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:59,391 INFO L225 Difference]: With dead ends: 857 [2021-08-30 16:39:59,392 INFO L226 Difference]: Without dead ends: 790 [2021-08-30 16:39:59,393 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 7780.79ms TimeCoverageRelationStatistics Valid=1469, Invalid=25921, Unknown=0, NotChecked=0, Total=27390 [2021-08-30 16:39:59,393 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 226 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 769.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 3272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.46ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 919.08ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:59,394 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 161 Invalid, 3272 Unknown, 0 Unchecked, 4.46ms Time], IncrementalHoareTripleChecker [50 Valid, 2593 Invalid, 0 Unknown, 629 Unchecked, 919.08ms Time] [2021-08-30 16:39:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-08-30 16:39:59,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 731. [2021-08-30 16:39:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 715 states have (on average 1.1202797202797203) internal successors, (801), 716 states have internal predecessors, (801), 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) [2021-08-30 16:39:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 815 transitions. [2021-08-30 16:39:59,402 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 815 transitions. Word has length 66 [2021-08-30 16:39:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:59,402 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 815 transitions. [2021-08-30 16:39:59,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 1.7916666666666667) internal successors, (172), 93 states have internal predecessors, (172), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 815 transitions. [2021-08-30 16:39:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-30 16:39:59,404 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:59,404 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-08-30 16:39:59,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:59,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:59,619 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:39:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:59,619 INFO L82 PathProgramCache]: Analyzing trace with hash 691672763, now seen corresponding path program 5 times [2021-08-30 16:39:59,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:59,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940969599] [2021-08-30 16:39:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:59,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:59,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:39:59,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:59,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940969599] [2021-08-30 16:39:59,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940969599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:59,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956335535] [2021-08-30 16:39:59,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:39:59,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:59,909 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) [2021-08-30 16:39:59,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-30 16:40:00,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-30 16:40:00,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:40:00,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-30 16:40:00,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:00,054 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 [2021-08-30 16:40:00,299 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 [2021-08-30 16:40:00,338 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 [2021-08-30 16:40:01,493 INFO L354 Elim1Store]: treesize reduction 55, result has 36.8 percent of original size [2021-08-30 16:40:01,493 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 45 treesize of output 54 [2021-08-30 16:40:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-30 16:40:01,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:02,590 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)) c_main_~nondetString1~0.base) (+ 2 c_main_~nondetString1~0.offset)) 0)) is different from false [2021-08-30 16:40:02,594 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 56 treesize of output 50 [2021-08-30 16:40:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-30 16:40:02,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956335535] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:02,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:02,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2021-08-30 16:40:02,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213264173] [2021-08-30 16:40:02,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-30 16:40:02,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:02,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-30 16:40:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1923, Unknown=1, NotChecked=88, Total=2162 [2021-08-30 16:40:02,797 INFO L87 Difference]: Start difference. First operand 731 states and 815 transitions. Second operand has 47 states, 45 states have (on average 2.933333333333333) internal successors, (132), 43 states have internal predecessors, (132), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:04,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:04,604 INFO L93 Difference]: Finished difference Result 838 states and 922 transitions. [2021-08-30 16:40:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-30 16:40:04,604 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.933333333333333) internal successors, (132), 43 states have internal predecessors, (132), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-08-30 16:40:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:04,606 INFO L225 Difference]: With dead ends: 838 [2021-08-30 16:40:04,606 INFO L226 Difference]: Without dead ends: 807 [2021-08-30 16:40:04,607 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 3340.81ms TimeCoverageRelationStatistics Valid=225, Invalid=2858, Unknown=1, NotChecked=108, Total=3192 [2021-08-30 16:40:04,608 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 92 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 233.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.24ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 285.93ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:04,609 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 124 Invalid, 1315 Unknown, 0 Unchecked, 2.24ms Time], IncrementalHoareTripleChecker [12 Valid, 895 Invalid, 0 Unknown, 408 Unchecked, 285.93ms Time] [2021-08-30 16:40:04,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-08-30 16:40:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 725. [2021-08-30 16:40:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 709 states have (on average 1.1184767277856136) internal successors, (793), 710 states have internal predecessors, (793), 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) [2021-08-30 16:40:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 807 transitions. [2021-08-30 16:40:04,619 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 807 transitions. Word has length 68 [2021-08-30 16:40:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:04,619 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 807 transitions. [2021-08-30 16:40:04,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.933333333333333) internal successors, (132), 43 states have internal predecessors, (132), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 807 transitions. [2021-08-30 16:40:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-30 16:40:04,621 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:04,621 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-08-30 16:40:04,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:04,836 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,SelfDestructingSolverStorable36 [2021-08-30 16:40:04,837 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:40:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash -473645327, now seen corresponding path program 6 times [2021-08-30 16:40:04,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:04,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173629475] [2021-08-30 16:40:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:04,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:05,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-30 16:40:05,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:05,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173629475] [2021-08-30 16:40:05,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173629475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:05,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258215959] [2021-08-30 16:40:05,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:40:05,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:05,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:05,174 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) [2021-08-30 16:40:05,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-30 16:40:05,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-30 16:40:05,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:40:05,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-30 16:40:05,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:05,296 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 [2021-08-30 16:40:05,524 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 [2021-08-30 16:40:05,582 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:40:05,582 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 [2021-08-30 16:40:06,187 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:40:06,187 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 [2021-08-30 16:40:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-30 16:40:06,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:07,982 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 13 [2021-08-30 16:40:07,983 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 26 treesize of output 22 [2021-08-30 16:40:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-30 16:40:08,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258215959] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:08,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:08,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 39 [2021-08-30 16:40:08,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948341302] [2021-08-30 16:40:08,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-30 16:40:08,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:08,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-30 16:40:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2021-08-30 16:40:08,181 INFO L87 Difference]: Start difference. First operand 725 states and 807 transitions. Second operand has 39 states, 38 states have (on average 3.026315789473684) internal successors, (115), 35 states have internal predecessors, (115), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:08,834 INFO L93 Difference]: Finished difference Result 728 states and 794 transitions. [2021-08-30 16:40:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-30 16:40:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.026315789473684) internal successors, (115), 35 states have internal predecessors, (115), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-08-30 16:40:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:08,836 INFO L225 Difference]: With dead ends: 728 [2021-08-30 16:40:08,836 INFO L226 Difference]: Without dead ends: 627 [2021-08-30 16:40:08,836 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2723.70ms TimeCoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 16:40:08,836 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 305.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 366.97ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:08,836 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 121 Invalid, 1425 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [15 Valid, 1095 Invalid, 0 Unknown, 315 Unchecked, 366.97ms Time] [2021-08-30 16:40:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-08-30 16:40:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 539. [2021-08-30 16:40:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 525 states have (on average 1.1142857142857143) internal successors, (585), 526 states have internal predecessors, (585), 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) [2021-08-30 16:40:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 597 transitions. [2021-08-30 16:40:08,842 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 597 transitions. Word has length 68 [2021-08-30 16:40:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:08,842 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 597 transitions. [2021-08-30 16:40:08,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.026315789473684) internal successors, (115), 35 states have internal predecessors, (115), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 597 transitions. [2021-08-30 16:40:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-30 16:40:08,843 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:08,843 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:08,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:09,043 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,SelfDestructingSolverStorable37 [2021-08-30 16:40:09,044 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:40:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:09,044 INFO L82 PathProgramCache]: Analyzing trace with hash 745766948, now seen corresponding path program 2 times [2021-08-30 16:40:09,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:09,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903136736] [2021-08-30 16:40:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:09,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:09,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:40:09,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:09,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903136736] [2021-08-30 16:40:09,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903136736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:09,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362069120] [2021-08-30 16:40:09,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:40:09,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:09,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:09,305 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) [2021-08-30 16:40:09,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-30 16:40:09,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:40:09,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:40:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-30 16:40:09,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:09,467 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:40:09,468 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 [2021-08-30 16:40:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:40:10,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:40:10,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362069120] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:10,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:10,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 48 [2021-08-30 16:40:10,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027918634] [2021-08-30 16:40:10,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-30 16:40:10,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-30 16:40:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-08-30 16:40:10,731 INFO L87 Difference]: Start difference. First operand 539 states and 597 transitions. Second operand has 49 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 45 states have internal predecessors, (180), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:11,759 INFO L93 Difference]: Finished difference Result 719 states and 792 transitions. [2021-08-30 16:40:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-30 16:40:11,760 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 45 states have internal predecessors, (180), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-08-30 16:40:11,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:11,761 INFO L225 Difference]: With dead ends: 719 [2021-08-30 16:40:11,761 INFO L226 Difference]: Without dead ends: 719 [2021-08-30 16:40:11,762 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1166.62ms TimeCoverageRelationStatistics Valid=505, Invalid=3785, Unknown=0, NotChecked=0, Total=4290 [2021-08-30 16:40:11,762 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 248 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 478.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.58ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 574.37ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:11,762 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 62 Invalid, 1575 Unknown, 0 Unchecked, 3.58ms Time], IncrementalHoareTripleChecker [34 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 574.37ms Time] [2021-08-30 16:40:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-08-30 16:40:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 564. [2021-08-30 16:40:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 550 states have (on average 1.1163636363636364) internal successors, (614), 551 states have internal predecessors, (614), 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) [2021-08-30 16:40:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 626 transitions. [2021-08-30 16:40:11,768 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 626 transitions. Word has length 69 [2021-08-30 16:40:11,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:11,768 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 626 transitions. [2021-08-30 16:40:11,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 45 states have internal predecessors, (180), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 626 transitions. [2021-08-30 16:40:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-30 16:40:11,770 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:11,770 INFO L513 BasicCegarLoop]: trace histogram [5, 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] [2021-08-30 16:40:11,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:11,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-30 16:40:11,971 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:40:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:11,971 INFO L82 PathProgramCache]: Analyzing trace with hash 476765743, now seen corresponding path program 7 times [2021-08-30 16:40:11,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:11,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297261975] [2021-08-30 16:40:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:11,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:40:12,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:12,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297261975] [2021-08-30 16:40:12,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297261975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:12,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998080349] [2021-08-30 16:40:12,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:40:12,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:12,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:12,175 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) [2021-08-30 16:40:12,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-30 16:40:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:12,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-30 16:40:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:12,293 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:40:12,293 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 [2021-08-30 16:40:12,295 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 [2021-08-30 16:40:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:40:12,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:40:13,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998080349] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:13,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:13,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 42 [2021-08-30 16:40:13,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658302864] [2021-08-30 16:40:13,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-30 16:40:13,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:13,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-30 16:40:13,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2021-08-30 16:40:13,264 INFO L87 Difference]: Start difference. First operand 564 states and 626 transitions. Second operand has 43 states, 42 states have (on average 4.5) internal successors, (189), 39 states have internal predecessors, (189), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:14,268 INFO L93 Difference]: Finished difference Result 851 states and 949 transitions. [2021-08-30 16:40:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-30 16:40:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.5) internal successors, (189), 39 states have internal predecessors, (189), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-08-30 16:40:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:14,271 INFO L225 Difference]: With dead ends: 851 [2021-08-30 16:40:14,271 INFO L226 Difference]: Without dead ends: 851 [2021-08-30 16:40:14,271 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 871.12ms TimeCoverageRelationStatistics Valid=416, Invalid=3490, Unknown=0, NotChecked=0, Total=3906 [2021-08-30 16:40:14,271 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 219 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 559.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.64ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 653.36ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:14,272 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 88 Invalid, 2418 Unknown, 0 Unchecked, 3.64ms Time], IncrementalHoareTripleChecker [27 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 653.36ms Time] [2021-08-30 16:40:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-08-30 16:40:14,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 638. [2021-08-30 16:40:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 624 states have (on average 1.1185897435897436) internal successors, (698), 625 states have internal predecessors, (698), 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) [2021-08-30 16:40:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 710 transitions. [2021-08-30 16:40:14,312 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 710 transitions. Word has length 70 [2021-08-30 16:40:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:14,313 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 710 transitions. [2021-08-30 16:40:14,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.5) internal successors, (189), 39 states have internal predecessors, (189), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 710 transitions. [2021-08-30 16:40:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-30 16:40:14,314 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:14,314 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:14,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:14,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:14,515 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:40:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:14,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1318677275, now seen corresponding path program 3 times [2021-08-30 16:40:14,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:14,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140136047] [2021-08-30 16:40:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:14,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:14,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 17 proven. 98 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:40:14,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:14,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140136047] [2021-08-30 16:40:14,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140136047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:14,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890858447] [2021-08-30 16:40:14,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:40:14,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:14,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:14,714 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) [2021-08-30 16:40:14,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-30 16:40:14,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-30 16:40:14,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:40:14,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-30 16:40:14,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:15,061 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 [2021-08-30 16:40:16,201 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-08-30 16:40:16,201 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 35 treesize of output 27 [2021-08-30 16:40:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 17 proven. 98 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:40:16,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:16,538 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 22 treesize of output 20 [2021-08-30 16:40:16,540 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 32 treesize of output 28 [2021-08-30 16:40:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 17 proven. 98 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:40:16,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890858447] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:16,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:16,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 53 [2021-08-30 16:40:16,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265720857] [2021-08-30 16:40:16,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-30 16:40:16,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-30 16:40:16,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2567, Unknown=0, NotChecked=0, Total=2756 [2021-08-30 16:40:16,974 INFO L87 Difference]: Start difference. First operand 638 states and 710 transitions. Second operand has 53 states, 50 states have (on average 3.18) internal successors, (159), 49 states have internal predecessors, (159), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:17,889 INFO L93 Difference]: Finished difference Result 992 states and 1096 transitions. [2021-08-30 16:40:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-30 16:40:17,889 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 3.18) internal successors, (159), 49 states have internal predecessors, (159), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-08-30 16:40:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:17,891 INFO L225 Difference]: With dead ends: 992 [2021-08-30 16:40:17,891 INFO L226 Difference]: Without dead ends: 929 [2021-08-30 16:40:17,891 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1461.79ms TimeCoverageRelationStatistics Valid=399, Invalid=5003, Unknown=0, NotChecked=0, Total=5402 [2021-08-30 16:40:17,892 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 139 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 275.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 332.99ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:17,892 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 147 Invalid, 1630 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [32 Valid, 937 Invalid, 0 Unknown, 661 Unchecked, 332.99ms Time] [2021-08-30 16:40:17,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-30 16:40:17,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 875. [2021-08-30 16:40:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 857 states have (on average 1.11901983663944) internal successors, (959), 858 states have internal predecessors, (959), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 975 transitions. [2021-08-30 16:40:17,901 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 975 transitions. Word has length 74 [2021-08-30 16:40:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:17,901 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 975 transitions. [2021-08-30 16:40:17,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 3.18) internal successors, (159), 49 states have internal predecessors, (159), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 975 transitions. [2021-08-30 16:40:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-30 16:40:17,903 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:17,903 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-08-30 16:40:17,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:18,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:18,120 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:40:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash -827856990, now seen corresponding path program 7 times [2021-08-30 16:40:18,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:18,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934155299] [2021-08-30 16:40:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:18,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:18,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:40:18,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:18,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934155299] [2021-08-30 16:40:18,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934155299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:18,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782387240] [2021-08-30 16:40:18,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:40:18,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:18,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:18,875 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) [2021-08-30 16:40:18,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-30 16:40:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:18,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-30 16:40:18,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:18,991 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:40:18,991 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 [2021-08-30 16:40:19,599 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 26 treesize of output 22 [2021-08-30 16:40:19,669 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-08-30 16:40:19,669 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 43 treesize of output 42 [2021-08-30 16:40:23,131 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:40:23,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 52 [2021-08-30 16:40:23,139 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-08-30 16:40:23,139 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 45 treesize of output 31 [2021-08-30 16:40:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 43 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:40:23,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:24,802 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 56 treesize of output 52 [2021-08-30 16:40:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:40:25,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782387240] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:25,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:25,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 23, 23] total 72 [2021-08-30 16:40:25,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043182451] [2021-08-30 16:40:25,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-08-30 16:40:25,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:25,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-08-30 16:40:25,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=4837, Unknown=2, NotChecked=0, Total=5112 [2021-08-30 16:40:25,732 INFO L87 Difference]: Start difference. First operand 875 states and 975 transitions. Second operand has 72 states, 69 states have (on average 2.652173913043478) internal successors, (183), 68 states have internal predecessors, (183), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:33,615 INFO L93 Difference]: Finished difference Result 983 states and 1090 transitions. [2021-08-30 16:40:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-30 16:40:33,619 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 69 states have (on average 2.652173913043478) internal successors, (183), 68 states have internal predecessors, (183), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-08-30 16:40:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:33,621 INFO L225 Difference]: With dead ends: 983 [2021-08-30 16:40:33,622 INFO L226 Difference]: Without dead ends: 983 [2021-08-30 16:40:33,623 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4333 ImplicationChecksByTransitivity, 10646.75ms TimeCoverageRelationStatistics Valid=1386, Invalid=18352, Unknown=2, NotChecked=0, Total=19740 [2021-08-30 16:40:33,623 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 346 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 725.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 4724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.67ms SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2228 IncrementalHoareTripleChecker+Unchecked, 856.92ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:33,624 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 218 Invalid, 4724 Unknown, 0 Unchecked, 6.67ms Time], IncrementalHoareTripleChecker [84 Valid, 2412 Invalid, 0 Unknown, 2228 Unchecked, 856.92ms Time] [2021-08-30 16:40:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-08-30 16:40:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 956. [2021-08-30 16:40:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 938 states have (on average 1.1162046908315566) internal successors, (1047), 939 states have internal predecessors, (1047), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1063 transitions. [2021-08-30 16:40:33,636 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1063 transitions. Word has length 75 [2021-08-30 16:40:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:33,636 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1063 transitions. [2021-08-30 16:40:33,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 69 states have (on average 2.652173913043478) internal successors, (183), 68 states have internal predecessors, (183), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1063 transitions. [2021-08-30 16:40:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-30 16:40:33,638 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:33,638 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-08-30 16:40:33,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:33,852 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,SelfDestructingSolverStorable41 [2021-08-30 16:40:33,853 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:40:33,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:33,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1921611278, now seen corresponding path program 8 times [2021-08-30 16:40:33,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:33,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461477751] [2021-08-30 16:40:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:33,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:34,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:40:34,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:34,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461477751] [2021-08-30 16:40:34,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461477751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:34,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262938251] [2021-08-30 16:40:34,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:40:34,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:34,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:34,694 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) [2021-08-30 16:40:34,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-30 16:40:34,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:40:34,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:40:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 111 conjunts are in the unsatisfiable core [2021-08-30 16:40:34,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:34,809 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 [2021-08-30 16:40:35,072 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 [2021-08-30 16:40:35,136 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 [2021-08-30 16:40:37,058 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:40:37,059 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 63 treesize of output 45 [2021-08-30 16:40:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:40:37,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:48,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:40:48,248 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 97 treesize of output 97 [2021-08-30 16:40:48,264 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 36 treesize of output 32 [2021-08-30 16:40:48,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:40:48,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2021-08-30 16:40:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:40:49,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262938251] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:49,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:49,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 27] total 77 [2021-08-30 16:40:49,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392263042] [2021-08-30 16:40:49,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-08-30 16:40:49,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:49,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-08-30 16:40:49,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=5558, Unknown=0, NotChecked=0, Total=5852 [2021-08-30 16:40:49,328 INFO L87 Difference]: Start difference. First operand 956 states and 1063 transitions. Second operand has 77 states, 75 states have (on average 2.2) internal successors, (165), 73 states have internal predecessors, (165), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:52,652 INFO L93 Difference]: Finished difference Result 1146 states and 1274 transitions. [2021-08-30 16:40:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-30 16:40:52,653 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 2.2) internal successors, (165), 73 states have internal predecessors, (165), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-08-30 16:40:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:52,656 INFO L225 Difference]: With dead ends: 1146 [2021-08-30 16:40:52,656 INFO L226 Difference]: Without dead ends: 1146 [2021-08-30 16:40:52,657 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4180 ImplicationChecksByTransitivity, 15721.54ms TimeCoverageRelationStatistics Valid=848, Invalid=16974, Unknown=0, NotChecked=0, Total=17822 [2021-08-30 16:40:52,659 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 221 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 671.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.72ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 788 IncrementalHoareTripleChecker+Unchecked, 793.54ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:52,660 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 195 Invalid, 2878 Unknown, 0 Unchecked, 5.72ms Time], IncrementalHoareTripleChecker [46 Valid, 2044 Invalid, 0 Unknown, 788 Unchecked, 793.54ms Time] [2021-08-30 16:40:52,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-08-30 16:40:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1131. [2021-08-30 16:40:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1113 states have (on average 1.1168014375561546) internal successors, (1243), 1114 states have internal predecessors, (1243), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1259 transitions. [2021-08-30 16:40:52,703 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1259 transitions. Word has length 75 [2021-08-30 16:40:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:52,705 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1259 transitions. [2021-08-30 16:40:52,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 2.2) internal successors, (165), 73 states have internal predecessors, (165), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1259 transitions. [2021-08-30 16:40:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-30 16:40:52,708 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:52,724 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 5, 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] [2021-08-30 16:40:52,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:52,925 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,SelfDestructingSolverStorable42 [2021-08-30 16:40:52,925 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:40:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash 5502520, now seen corresponding path program 4 times [2021-08-30 16:40:52,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:52,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681253425] [2021-08-30 16:40:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:52,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:53,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:40:53,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:53,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681253425] [2021-08-30 16:40:53,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681253425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:53,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492276944] [2021-08-30 16:40:53,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:40:53,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:53,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:53,197 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) [2021-08-30 16:40:53,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-30 16:40:53,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:40:53,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:40:53,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 73 conjunts are in the unsatisfiable core [2021-08-30 16:40:53,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:53,305 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:40:53,306 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 [2021-08-30 16:40:53,508 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 [2021-08-30 16:40:54,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:40:54,026 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 21 treesize of output 21 [2021-08-30 16:40:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 32 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:40:54,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:55,000 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 29 treesize of output 27 [2021-08-30 16:40:55,002 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 39 treesize of output 35 [2021-08-30 16:40:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:40:55,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492276944] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:55,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:55,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 57 [2021-08-30 16:40:55,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375689219] [2021-08-30 16:40:55,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-30 16:40:55,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:55,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-30 16:40:55,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3007, Unknown=0, NotChecked=0, Total=3306 [2021-08-30 16:40:55,718 INFO L87 Difference]: Start difference. First operand 1131 states and 1259 transitions. Second operand has 58 states, 54 states have (on average 3.5) internal successors, (189), 54 states have internal predecessors, (189), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:58,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:58,509 INFO L93 Difference]: Finished difference Result 1868 states and 2077 transitions. [2021-08-30 16:40:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-30 16:40:58,535 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 54 states have (on average 3.5) internal successors, (189), 54 states have internal predecessors, (189), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-08-30 16:40:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:58,539 INFO L225 Difference]: With dead ends: 1868 [2021-08-30 16:40:58,539 INFO L226 Difference]: Without dead ends: 1868 [2021-08-30 16:40:58,540 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 3049.85ms TimeCoverageRelationStatistics Valid=1146, Invalid=10626, Unknown=0, NotChecked=0, Total=11772 [2021-08-30 16:40:58,541 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 350 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 3444 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 891.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 4019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.24ms SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 3444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 443 IncrementalHoareTripleChecker+Unchecked, 1029.44ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:58,541 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 96 Invalid, 4019 Unknown, 0 Unchecked, 5.24ms Time], IncrementalHoareTripleChecker [132 Valid, 3444 Invalid, 0 Unknown, 443 Unchecked, 1029.44ms Time] [2021-08-30 16:40:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-08-30 16:40:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1191. [2021-08-30 16:40:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1173 states have (on average 1.1193520886615516) internal successors, (1313), 1174 states have internal predecessors, (1313), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1329 transitions. [2021-08-30 16:40:58,568 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1329 transitions. Word has length 78 [2021-08-30 16:40:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:58,568 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1329 transitions. [2021-08-30 16:40:58,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 54 states have (on average 3.5) internal successors, (189), 54 states have internal predecessors, (189), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1329 transitions. [2021-08-30 16:40:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-30 16:40:58,571 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:58,571 INFO L513 BasicCegarLoop]: trace histogram [6, 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] [2021-08-30 16:40:58,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:58,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:58,788 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:40:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash 118300730, now seen corresponding path program 8 times [2021-08-30 16:40:58,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:58,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845609473] [2021-08-30 16:40:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:58,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:59,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:40:59,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:59,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845609473] [2021-08-30 16:40:59,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845609473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:59,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422085743] [2021-08-30 16:40:59,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:40:59,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:59,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:59,260 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) [2021-08-30 16:40:59,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-30 16:40:59,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:40:59,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:40:59,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 114 conjunts are in the unsatisfiable core [2021-08-30 16:40:59,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:59,412 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 [2021-08-30 16:40:59,607 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 [2021-08-30 16:40:59,641 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 [2021-08-30 16:41:00,728 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:41:00,729 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 52 treesize of output 34 [2021-08-30 16:41:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:41:00,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:41:01,626 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~length2~0 Int)) (let ((.cse0 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) c_main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse1 (select .cse0 c_main_~nondetString2~0.offset))) (or (not (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse0) c_main_~nondetString1~0.base) (+ c_main_~nondetString1~0.offset 4)) .cse1)) (= .cse1 0))))) is different from false [2021-08-30 16:41:01,636 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:41:01,637 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 167 [2021-08-30 16:41:01,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:41:01,641 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 163 treesize of output 157 [2021-08-30 16:41:01,680 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-08-30 16:41:01,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-08-30 16:41:01,719 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-08-30 16:41:01,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-08-30 16:41:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:41:01,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422085743] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:41:01,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:41:01,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 74 [2021-08-30 16:41:01,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567533407] [2021-08-30 16:41:01,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-08-30 16:41:01,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:41:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-30 16:41:01,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4995, Unknown=1, NotChecked=142, Total=5402 [2021-08-30 16:41:01,977 INFO L87 Difference]: Start difference. First operand 1191 states and 1329 transitions. Second operand has 74 states, 72 states have (on average 2.5555555555555554) internal successors, (184), 70 states have internal predecessors, (184), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:41:04,639 INFO L93 Difference]: Finished difference Result 1655 states and 1843 transitions. [2021-08-30 16:41:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-30 16:41:04,640 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 72 states have (on average 2.5555555555555554) internal successors, (184), 70 states have internal predecessors, (184), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-08-30 16:41:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:41:04,650 INFO L225 Difference]: With dead ends: 1655 [2021-08-30 16:41:04,650 INFO L226 Difference]: Without dead ends: 1611 [2021-08-30 16:41:04,651 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2937 ImplicationChecksByTransitivity, 4067.57ms TimeCoverageRelationStatistics Valid=601, Invalid=13208, Unknown=1, NotChecked=232, Total=14042 [2021-08-30 16:41:04,651 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 171 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 539.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 3882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.35ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 925 IncrementalHoareTripleChecker+Unchecked, 634.08ms IncrementalHoareTripleChecker+Time [2021-08-30 16:41:04,652 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 221 Invalid, 3882 Unknown, 0 Unchecked, 5.35ms Time], IncrementalHoareTripleChecker [30 Valid, 2927 Invalid, 0 Unknown, 925 Unchecked, 634.08ms Time] [2021-08-30 16:41:04,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-08-30 16:41:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1523. [2021-08-30 16:41:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1501 states have (on average 1.1239173884077283) internal successors, (1687), 1502 states have internal predecessors, (1687), 19 states have call successors, (19), 19 states have call predecessors, (19), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 1707 transitions. [2021-08-30 16:41:04,665 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 1707 transitions. Word has length 78 [2021-08-30 16:41:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:41:04,666 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 1707 transitions. [2021-08-30 16:41:04,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 72 states have (on average 2.5555555555555554) internal successors, (184), 70 states have internal predecessors, (184), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 1707 transitions. [2021-08-30 16:41:04,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-30 16:41:04,668 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:41:04,668 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:41:04,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-30 16:41:04,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:41:04,886 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:41:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:41:04,886 INFO L82 PathProgramCache]: Analyzing trace with hash 195752601, now seen corresponding path program 9 times [2021-08-30 16:41:04,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:41:04,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019227975] [2021-08-30 16:41:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:41:04,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:41:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:41:05,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:41:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:41:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 16:41:05,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:41:05,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019227975] [2021-08-30 16:41:05,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019227975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:41:05,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32640746] [2021-08-30 16:41:05,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:41:05,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:41:05,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:41:05,366 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) [2021-08-30 16:41:05,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-30 16:41:05,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-30 16:41:05,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:41:05,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-30 16:41:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:41:05,488 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 [2021-08-30 16:41:05,649 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 [2021-08-30 16:41:05,687 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:41:05,688 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 [2021-08-30 16:41:06,233 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:41:06,233 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 [2021-08-30 16:41:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 9 proven. 98 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:41:06,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:41:06,964 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (= 0 (select (select (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)) c_main_~nondetString1~0.base) (+ 3 c_main_~nondetString1~0.offset)))) is different from false [2021-08-30 16:41:06,966 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 56 treesize of output 50 [2021-08-30 16:41:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 99 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:41:07,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32640746] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:41:07,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:41:07,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 19] total 51 [2021-08-30 16:41:07,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083668306] [2021-08-30 16:41:07,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-30 16:41:07,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:41:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-30 16:41:07,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2308, Unknown=1, NotChecked=96, Total=2550 [2021-08-30 16:41:07,190 INFO L87 Difference]: Start difference. First operand 1523 states and 1707 transitions. Second operand has 51 states, 48 states have (on average 3.0625) internal successors, (147), 47 states have internal predecessors, (147), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:41:14,109 INFO L93 Difference]: Finished difference Result 1679 states and 1876 transitions. [2021-08-30 16:41:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-30 16:41:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 3.0625) internal successors, (147), 47 states have internal predecessors, (147), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-08-30 16:41:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:41:14,112 INFO L225 Difference]: With dead ends: 1679 [2021-08-30 16:41:14,113 INFO L226 Difference]: Without dead ends: 1547 [2021-08-30 16:41:14,113 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 7651.41ms TimeCoverageRelationStatistics Valid=405, Invalid=5756, Unknown=5, NotChecked=154, Total=6320 [2021-08-30 16:41:14,113 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 211 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 600.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.50ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1084 IncrementalHoareTripleChecker+Unchecked, 715.41ms IncrementalHoareTripleChecker+Time [2021-08-30 16:41:14,114 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 191 Invalid, 3175 Unknown, 0 Unchecked, 4.50ms Time], IncrementalHoareTripleChecker [34 Valid, 2057 Invalid, 0 Unknown, 1084 Unchecked, 715.41ms Time] [2021-08-30 16:41:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-08-30 16:41:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1382. [2021-08-30 16:41:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1382 states, 1360 states have (on average 1.1316176470588235) internal successors, (1539), 1361 states have internal predecessors, (1539), 19 states have call successors, (19), 19 states have call predecessors, (19), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 1559 transitions. [2021-08-30 16:41:14,127 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 1559 transitions. Word has length 80 [2021-08-30 16:41:14,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:41:14,127 INFO L470 AbstractCegarLoop]: Abstraction has 1382 states and 1559 transitions. [2021-08-30 16:41:14,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 3.0625) internal successors, (147), 47 states have internal predecessors, (147), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 1559 transitions. [2021-08-30 16:41:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-30 16:41:14,129 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:41:14,129 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:41:14,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-30 16:41:14,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:41:14,364 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:41:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:41:14,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1260550227, now seen corresponding path program 10 times [2021-08-30 16:41:14,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:41:14,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110318986] [2021-08-30 16:41:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:41:14,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:41:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:41:15,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:41:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:41:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 16:41:15,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:41:15,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110318986] [2021-08-30 16:41:15,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110318986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:41:15,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097066833] [2021-08-30 16:41:15,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:41:15,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:41:15,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:41:15,015 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) [2021-08-30 16:41:15,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-30 16:41:15,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:41:15,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:41:15,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 116 conjunts are in the unsatisfiable core [2021-08-30 16:41:15,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:41:15,154 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 [2021-08-30 16:41:15,159 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 [2021-08-30 16:41:15,638 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 [2021-08-30 16:41:15,679 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 [2021-08-30 16:41:16,764 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 45 treesize of output 37 [2021-08-30 16:41:17,336 INFO L354 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2021-08-30 16:41:17,337 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 62 treesize of output 48 [2021-08-30 16:41:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 23 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:41:17,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:41:19,709 INFO L354 Elim1Store]: treesize reduction 14, result has 67.4 percent of original size [2021-08-30 16:41:19,709 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 211 treesize of output 180 [2021-08-30 16:41:19,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:41:19,715 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 180 treesize of output 174 [2021-08-30 16:41:19,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:41:19,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2021-08-30 16:41:19,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:41:19,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 153 treesize of output 197 [2021-08-30 16:41:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 50 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:41:23,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097066833] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:41:23,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:41:23,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 31, 30] total 82 [2021-08-30 16:41:23,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181753220] [2021-08-30 16:41:23,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-08-30 16:41:23,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:41:23,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-08-30 16:41:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=6245, Unknown=0, NotChecked=0, Total=6642 [2021-08-30 16:41:23,049 INFO L87 Difference]: Start difference. First operand 1382 states and 1559 transitions. Second operand has 82 states, 79 states have (on average 2.569620253164557) internal successors, (203), 78 states have internal predecessors, (203), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:41:35,019 INFO L93 Difference]: Finished difference Result 2238 states and 2505 transitions. [2021-08-30 16:41:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-08-30 16:41:35,020 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 79 states have (on average 2.569620253164557) internal successors, (203), 78 states have internal predecessors, (203), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-08-30 16:41:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:41:35,023 INFO L225 Difference]: With dead ends: 2238 [2021-08-30 16:41:35,023 INFO L226 Difference]: Without dead ends: 2110 [2021-08-30 16:41:35,025 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13204 ImplicationChecksByTransitivity, 13943.84ms TimeCoverageRelationStatistics Valid=4167, Invalid=43575, Unknown=0, NotChecked=0, Total=47742 [2021-08-30 16:41:35,026 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 456 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 3750 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1258.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 5780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.20ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1913 IncrementalHoareTripleChecker+Unchecked, 1474.75ms IncrementalHoareTripleChecker+Time [2021-08-30 16:41:35,026 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 160 Invalid, 5780 Unknown, 0 Unchecked, 9.20ms Time], IncrementalHoareTripleChecker [117 Valid, 3750 Invalid, 0 Unknown, 1913 Unchecked, 1474.75ms Time] [2021-08-30 16:41:35,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-08-30 16:41:35,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1764. [2021-08-30 16:41:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1743 states have (on average 1.140562248995984) internal successors, (1988), 1744 states have internal predecessors, (1988), 18 states have call successors, (18), 18 states have call predecessors, (18), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2007 transitions. [2021-08-30 16:41:35,049 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2007 transitions. Word has length 80 [2021-08-30 16:41:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:41:35,050 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 2007 transitions. [2021-08-30 16:41:35,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 79 states have (on average 2.569620253164557) internal successors, (203), 78 states have internal predecessors, (203), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2007 transitions. [2021-08-30 16:41:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-30 16:41:35,058 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:41:35,058 INFO L513 BasicCegarLoop]: trace histogram [6, 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] [2021-08-30 16:41:35,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-30 16:41:35,287 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,SelfDestructingSolverStorable46 [2021-08-30 16:41:35,288 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:41:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:41:35,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1163399145, now seen corresponding path program 9 times [2021-08-30 16:41:35,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:41:35,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369423926] [2021-08-30 16:41:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:41:35,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:41:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:41:35,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:41:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:41:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:41:35,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:41:35,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369423926] [2021-08-30 16:41:35,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369423926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:41:35,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601365752] [2021-08-30 16:41:35,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:41:35,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:41:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:41:35,570 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) [2021-08-30 16:41:35,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-30 16:41:35,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-30 16:41:35,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:41:35,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-30 16:41:35,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:41:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:41:36,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:41:36,522 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 7 treesize of output 5 [2021-08-30 16:41:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:41:36,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601365752] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:41:36,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:41:36,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2021-08-30 16:41:36,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091080461] [2021-08-30 16:41:36,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-30 16:41:36,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:41:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-30 16:41:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1753, Unknown=0, NotChecked=0, Total=1980 [2021-08-30 16:41:36,593 INFO L87 Difference]: Start difference. First operand 1764 states and 2007 transitions. Second operand has 45 states, 44 states have (on average 4.4772727272727275) internal successors, (197), 41 states have internal predecessors, (197), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:41:37,973 INFO L93 Difference]: Finished difference Result 2252 states and 2560 transitions. [2021-08-30 16:41:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-30 16:41:37,974 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.4772727272727275) internal successors, (197), 41 states have internal predecessors, (197), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-08-30 16:41:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:41:37,978 INFO L225 Difference]: With dead ends: 2252 [2021-08-30 16:41:37,978 INFO L226 Difference]: Without dead ends: 2252 [2021-08-30 16:41:37,978 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1028.55ms TimeCoverageRelationStatistics Valid=488, Invalid=3294, Unknown=0, NotChecked=0, Total=3782 [2021-08-30 16:41:37,979 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 187 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 805.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.80ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 970.13ms IncrementalHoareTripleChecker+Time [2021-08-30 16:41:37,979 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 155 Invalid, 2971 Unknown, 0 Unchecked, 5.80ms Time], IncrementalHoareTripleChecker [27 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 970.13ms Time] [2021-08-30 16:41:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-08-30 16:41:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1871. [2021-08-30 16:41:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1850 states have (on average 1.1405405405405404) internal successors, (2110), 1851 states have internal predecessors, (2110), 18 states have call successors, (18), 18 states have call predecessors, (18), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2129 transitions. [2021-08-30 16:41:37,995 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2129 transitions. Word has length 82 [2021-08-30 16:41:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:41:37,995 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 2129 transitions. [2021-08-30 16:41:37,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.4772727272727275) internal successors, (197), 41 states have internal predecessors, (197), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2129 transitions. [2021-08-30 16:41:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-30 16:41:37,997 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:41:37,997 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:41:38,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-30 16:41:38,214 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,SelfDestructingSolverStorable47 [2021-08-30 16:41:38,214 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:41:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:41:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1119620800, now seen corresponding path program 11 times [2021-08-30 16:41:38,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:41:38,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215404899] [2021-08-30 16:41:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:41:38,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:41:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:41:38,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:41:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:41:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 8 proven. 98 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:41:38,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:41:38,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215404899] [2021-08-30 16:41:38,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215404899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:41:38,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083352875] [2021-08-30 16:41:38,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:41:38,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:41:38,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:41:38,589 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) [2021-08-30 16:41:38,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-30 16:41:38,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-30 16:41:38,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:41:38,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 154 conjunts are in the unsatisfiable core [2021-08-30 16:41:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:41:38,941 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 25 treesize of output 21 [2021-08-30 16:41:38,993 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:41:38,994 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 [2021-08-30 16:41:41,406 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-08-30 16:41:41,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 56 [2021-08-30 16:41:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:41:41,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:41:47,347 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 21 treesize of output 17 [2021-08-30 16:41:47,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:41:47,374 INFO L354 Elim1Store]: treesize reduction 58, result has 35.6 percent of original size [2021-08-30 16:41:47,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 436 treesize of output 334 [2021-08-30 16:41:47,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:41:47,380 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 326 treesize of output 306 [2021-08-30 16:41:47,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:41:47,448 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-08-30 16:41:47,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 35 [2021-08-30 16:41:47,454 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-30 16:41:47,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 81 [2021-08-30 16:41:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 105 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:41:47,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083352875] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:41:47,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:41:47,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 38, 36] total 99 [2021-08-30 16:41:47,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218305422] [2021-08-30 16:41:47,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-30 16:41:47,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:41:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-30 16:41:47,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=8916, Unknown=1, NotChecked=0, Total=9702 [2021-08-30 16:41:47,991 INFO L87 Difference]: Start difference. First operand 1871 states and 2129 transitions. Second operand has 99 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:41:53,528 INFO L93 Difference]: Finished difference Result 3066 states and 3492 transitions. [2021-08-30 16:41:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-08-30 16:41:53,528 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-08-30 16:41:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:41:53,534 INFO L225 Difference]: With dead ends: 3066 [2021-08-30 16:41:53,534 INFO L226 Difference]: Without dead ends: 3066 [2021-08-30 16:41:53,536 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6729 ImplicationChecksByTransitivity, 12297.88ms TimeCoverageRelationStatistics Valid=2394, Invalid=29825, Unknown=1, NotChecked=0, Total=32220 [2021-08-30 16:41:53,537 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 232 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 707.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.31ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 850.14ms IncrementalHoareTripleChecker+Time [2021-08-30 16:41:53,537 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 210 Invalid, 2458 Unknown, 0 Unchecked, 5.31ms Time], IncrementalHoareTripleChecker [18 Valid, 2159 Invalid, 0 Unknown, 281 Unchecked, 850.14ms Time] [2021-08-30 16:41:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-08-30 16:41:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 1957. [2021-08-30 16:41:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1936 states have (on average 1.1394628099173554) internal successors, (2206), 1937 states have internal predecessors, (2206), 18 states have call successors, (18), 18 states have call predecessors, (18), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 2225 transitions. [2021-08-30 16:41:53,574 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 2225 transitions. Word has length 84 [2021-08-30 16:41:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:41:53,574 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 2225 transitions. [2021-08-30 16:41:53,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 2225 transitions. [2021-08-30 16:41:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-30 16:41:53,576 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:41:53,576 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:41:53,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-30 16:41:53,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-30 16:41:53,793 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:41:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:41:53,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2098594678, now seen corresponding path program 12 times [2021-08-30 16:41:53,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:41:53,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518321068] [2021-08-30 16:41:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:41:53,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:41:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:41:54,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:41:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:41:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 8 proven. 98 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:41:54,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:41:54,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518321068] [2021-08-30 16:41:54,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518321068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:41:54,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952007181] [2021-08-30 16:41:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:41:54,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:41:54,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:41:54,194 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) [2021-08-30 16:41:54,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-30 16:41:54,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-30 16:41:54,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:41:54,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-30 16:41:54,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:41:54,879 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 [2021-08-30 16:41:54,938 INFO L354 Elim1Store]: treesize reduction 38, result has 20.8 percent of original size [2021-08-30 16:41:54,939 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 36 treesize of output 35 [2021-08-30 16:41:55,887 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-30 16:41:55,888 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 25 [2021-08-30 16:41:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 8 proven. 113 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:41:55,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:41:56,236 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 56 treesize of output 50 [2021-08-30 16:41:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 8 proven. 113 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:41:56,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952007181] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:41:56,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:41:56,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2021-08-30 16:41:56,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283516871] [2021-08-30 16:41:56,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-30 16:41:56,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:41:56,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-30 16:41:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=4165, Unknown=0, NotChecked=0, Total=4422 [2021-08-30 16:41:56,963 INFO L87 Difference]: Start difference. First operand 1957 states and 2225 transitions. Second operand has 67 states, 65 states have (on average 2.646153846153846) internal successors, (172), 63 states have internal predecessors, (172), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:41:59,729 INFO L93 Difference]: Finished difference Result 2207 states and 2458 transitions. [2021-08-30 16:41:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-30 16:41:59,757 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 65 states have (on average 2.646153846153846) internal successors, (172), 63 states have internal predecessors, (172), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-08-30 16:41:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:41:59,761 INFO L225 Difference]: With dead ends: 2207 [2021-08-30 16:41:59,761 INFO L226 Difference]: Without dead ends: 1935 [2021-08-30 16:41:59,762 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3882 ImplicationChecksByTransitivity, 3293.16ms TimeCoverageRelationStatistics Valid=927, Invalid=16365, Unknown=0, NotChecked=0, Total=17292 [2021-08-30 16:41:59,762 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 337 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 4054 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 887.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 4700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.19ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 4054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 1042.29ms IncrementalHoareTripleChecker+Time [2021-08-30 16:41:59,762 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 187 Invalid, 4700 Unknown, 0 Unchecked, 7.19ms Time], IncrementalHoareTripleChecker [89 Valid, 4054 Invalid, 0 Unknown, 557 Unchecked, 1042.29ms Time] [2021-08-30 16:41:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-08-30 16:41:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1348. [2021-08-30 16:41:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1328 states have (on average 1.1362951807228916) internal successors, (1509), 1329 states have internal predecessors, (1509), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1527 transitions. [2021-08-30 16:41:59,774 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1527 transitions. Word has length 84 [2021-08-30 16:41:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:41:59,774 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 1527 transitions. [2021-08-30 16:41:59,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 65 states have (on average 2.646153846153846) internal successors, (172), 63 states have internal predecessors, (172), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:41:59,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1527 transitions. [2021-08-30 16:41:59,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-30 16:41:59,776 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:41:59,776 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2021-08-30 16:41:59,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-30 16:41:59,995 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,SelfDestructingSolverStorable49 [2021-08-30 16:41:59,995 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:41:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:41:59,996 INFO L82 PathProgramCache]: Analyzing trace with hash -444604796, now seen corresponding path program 13 times [2021-08-30 16:41:59,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:41:59,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455795209] [2021-08-30 16:41:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:41:59,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:42:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:00,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:42:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:42:00,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:42:00,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455795209] [2021-08-30 16:42:00,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455795209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:42:00,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397097740] [2021-08-30 16:42:00,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:42:00,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:00,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:42:00,321 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) [2021-08-30 16:42:00,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-30 16:42:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 73 conjunts are in the unsatisfiable core [2021-08-30 16:42:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:42:00,431 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 [2021-08-30 16:42:00,628 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 [2021-08-30 16:42:00,663 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:42:00,663 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 [2021-08-30 16:42:01,598 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:42:01,598 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 49 treesize of output 34 [2021-08-30 16:42:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 11 proven. 128 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:42:01,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:42:02,718 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 62 treesize of output 56 [2021-08-30 16:42:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:42:03,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397097740] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:42:03,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:42:03,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 52 [2021-08-30 16:42:03,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458112723] [2021-08-30 16:42:03,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-30 16:42:03,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:42:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-30 16:42:03,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2492, Unknown=1, NotChecked=0, Total=2652 [2021-08-30 16:42:03,108 INFO L87 Difference]: Start difference. First operand 1348 states and 1527 transitions. Second operand has 52 states, 50 states have (on average 3.38) internal successors, (169), 48 states have internal predecessors, (169), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:42:03,764 INFO L93 Difference]: Finished difference Result 1614 states and 1811 transitions. [2021-08-30 16:42:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-30 16:42:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 3.38) internal successors, (169), 48 states have internal predecessors, (169), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-08-30 16:42:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:42:03,767 INFO L225 Difference]: With dead ends: 1614 [2021-08-30 16:42:03,767 INFO L226 Difference]: Without dead ends: 1560 [2021-08-30 16:42:03,768 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2149.46ms TimeCoverageRelationStatistics Valid=260, Invalid=3899, Unknown=1, NotChecked=0, Total=4160 [2021-08-30 16:42:03,768 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 298.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.41ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 351.60ms IncrementalHoareTripleChecker+Time [2021-08-30 16:42:03,768 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 175 Invalid, 2125 Unknown, 0 Unchecked, 2.41ms Time], IncrementalHoareTripleChecker [18 Valid, 1647 Invalid, 0 Unknown, 460 Unchecked, 351.60ms Time] [2021-08-30 16:42:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-08-30 16:42:03,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1138. [2021-08-30 16:42:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1118 states have (on average 1.1288014311270125) internal successors, (1262), 1119 states have internal predecessors, (1262), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1280 transitions. [2021-08-30 16:42:03,777 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1280 transitions. Word has length 87 [2021-08-30 16:42:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:42:03,778 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1280 transitions. [2021-08-30 16:42:03,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 3.38) internal successors, (169), 48 states have internal predecessors, (169), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1280 transitions. [2021-08-30 16:42:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-30 16:42:03,779 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:42:03,779 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2021-08-30 16:42:03,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-30 16:42:03,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:03,997 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:42:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:42:03,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1609922886, now seen corresponding path program 14 times [2021-08-30 16:42:03,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:42:03,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927302148] [2021-08-30 16:42:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:42:03,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:42:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:04,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:42:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:42:04,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:42:04,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927302148] [2021-08-30 16:42:04,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927302148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:42:04,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523230156] [2021-08-30 16:42:04,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:42:04,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:04,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:42:04,317 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) [2021-08-30 16:42:04,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-30 16:42:04,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:42:04,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:42:04,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 112 conjunts are in the unsatisfiable core [2021-08-30 16:42:04,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:42:04,430 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 [2021-08-30 16:42:04,645 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 [2021-08-30 16:42:04,674 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 [2021-08-30 16:42:05,682 INFO L354 Elim1Store]: treesize reduction 75, result has 9.6 percent of original size [2021-08-30 16:42:05,682 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 34 [2021-08-30 16:42:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:42:05,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:42:06,793 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (let ((.cse0 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse1 (select .cse0 main_~nondetString2~0.offset))) (or (not (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse0) c_main_~nondetString1~0.base) (+ c_main_~nondetString1~0.offset 4)) .cse1)) (= .cse1 0))))) is different from false [2021-08-30 16:42:06,807 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:42:06,807 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 167 [2021-08-30 16:42:06,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:42:06,812 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 163 treesize of output 157 [2021-08-30 16:42:06,864 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-08-30 16:42:06,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-08-30 16:42:06,923 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-08-30 16:42:06,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-08-30 16:42:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 15 proven. 123 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:42:07,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523230156] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:42:07,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:42:07,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 74 [2021-08-30 16:42:07,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949923322] [2021-08-30 16:42:07,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-08-30 16:42:07,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:42:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-30 16:42:07,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=4987, Unknown=1, NotChecked=142, Total=5402 [2021-08-30 16:42:07,264 INFO L87 Difference]: Start difference. First operand 1138 states and 1280 transitions. Second operand has 74 states, 72 states have (on average 2.5833333333333335) internal successors, (186), 70 states have internal predecessors, (186), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:42:10,505 INFO L93 Difference]: Finished difference Result 1440 states and 1621 transitions. [2021-08-30 16:42:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-30 16:42:10,506 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 72 states have (on average 2.5833333333333335) internal successors, (186), 70 states have internal predecessors, (186), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-08-30 16:42:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:42:10,508 INFO L225 Difference]: With dead ends: 1440 [2021-08-30 16:42:10,509 INFO L226 Difference]: Without dead ends: 1440 [2021-08-30 16:42:10,510 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3095 ImplicationChecksByTransitivity, 4692.94ms TimeCoverageRelationStatistics Valid=643, Invalid=12932, Unknown=1, NotChecked=230, Total=13806 [2021-08-30 16:42:10,510 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 142 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 578.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.56ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1042 IncrementalHoareTripleChecker+Unchecked, 696.49ms IncrementalHoareTripleChecker+Time [2021-08-30 16:42:10,510 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 242 Invalid, 3418 Unknown, 0 Unchecked, 5.56ms Time], IncrementalHoareTripleChecker [36 Valid, 2340 Invalid, 0 Unknown, 1042 Unchecked, 696.49ms Time] [2021-08-30 16:42:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-08-30 16:42:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1392. [2021-08-30 16:42:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1372 states have (on average 1.1355685131195334) internal successors, (1558), 1373 states have internal predecessors, (1558), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 1576 transitions. [2021-08-30 16:42:10,521 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 1576 transitions. Word has length 87 [2021-08-30 16:42:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:42:10,521 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 1576 transitions. [2021-08-30 16:42:10,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 72 states have (on average 2.5833333333333335) internal successors, (186), 70 states have internal predecessors, (186), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 1576 transitions. [2021-08-30 16:42:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-30 16:42:10,523 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:42:10,523 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2021-08-30 16:42:10,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-30 16:42:10,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:10,740 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:42:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:42:10,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1608292592, now seen corresponding path program 15 times [2021-08-30 16:42:10,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:42:10,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939109000] [2021-08-30 16:42:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:42:10,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:42:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:11,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:42:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:42:11,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:42:11,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939109000] [2021-08-30 16:42:11,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939109000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:42:11,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058933104] [2021-08-30 16:42:11,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:42:11,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:11,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:42:11,222 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) [2021-08-30 16:42:11,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-30 16:42:11,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-30 16:42:11,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:42:11,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-30 16:42:11,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:42:11,364 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 [2021-08-30 16:42:11,600 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 [2021-08-30 16:42:11,650 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:42:11,650 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 [2021-08-30 16:42:12,465 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:42:12,465 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 [2021-08-30 16:42:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:42:12,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:42:23,337 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 13 [2021-08-30 16:42:23,338 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 26 treesize of output 22 [2021-08-30 16:42:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:42:23,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058933104] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:42:23,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:42:23,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 20] total 61 [2021-08-30 16:42:23,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223656461] [2021-08-30 16:42:23,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-30 16:42:23,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:42:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-30 16:42:23,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3487, Unknown=0, NotChecked=0, Total=3660 [2021-08-30 16:42:23,684 INFO L87 Difference]: Start difference. First operand 1392 states and 1576 transitions. Second operand has 61 states, 60 states have (on average 3.316666666666667) internal successors, (199), 57 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:42:25,450 INFO L93 Difference]: Finished difference Result 1616 states and 1796 transitions. [2021-08-30 16:42:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-30 16:42:25,450 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.316666666666667) internal successors, (199), 57 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-08-30 16:42:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:42:25,460 INFO L225 Difference]: With dead ends: 1616 [2021-08-30 16:42:25,460 INFO L226 Difference]: Without dead ends: 1461 [2021-08-30 16:42:25,461 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 12927.06ms TimeCoverageRelationStatistics Valid=393, Invalid=7797, Unknown=0, NotChecked=0, Total=8190 [2021-08-30 16:42:25,461 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 118 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 3008 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 638.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 4876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.23ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1848 IncrementalHoareTripleChecker+Unchecked, 768.00ms IncrementalHoareTripleChecker+Time [2021-08-30 16:42:25,461 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 295 Invalid, 4876 Unknown, 0 Unchecked, 6.23ms Time], IncrementalHoareTripleChecker [20 Valid, 3008 Invalid, 0 Unknown, 1848 Unchecked, 768.00ms Time] [2021-08-30 16:42:25,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-08-30 16:42:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1074. [2021-08-30 16:42:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1054 states have (on average 1.1299810246679316) internal successors, (1191), 1055 states have internal predecessors, (1191), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1209 transitions. [2021-08-30 16:42:25,472 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1209 transitions. Word has length 87 [2021-08-30 16:42:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:42:25,472 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1209 transitions. [2021-08-30 16:42:25,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.316666666666667) internal successors, (199), 57 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1209 transitions. [2021-08-30 16:42:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-30 16:42:25,474 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:42:25,474 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2021-08-30 16:42:25,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-30 16:42:25,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:25,692 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:42:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:42:25,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1139545382, now seen corresponding path program 16 times [2021-08-30 16:42:25,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:42:25,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658370042] [2021-08-30 16:42:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:42:25,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:42:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:26,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:42:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:42:26,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:42:26,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658370042] [2021-08-30 16:42:26,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658370042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:42:26,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670328923] [2021-08-30 16:42:26,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:42:26,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:26,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:42:26,224 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) [2021-08-30 16:42:26,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-30 16:42:26,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:42:26,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:42:26,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 112 conjunts are in the unsatisfiable core [2021-08-30 16:42:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:42:26,344 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 [2021-08-30 16:42:26,348 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 [2021-08-30 16:42:26,891 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 [2021-08-30 16:42:26,932 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 [2021-08-30 16:42:28,218 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 45 treesize of output 37 [2021-08-30 16:42:28,509 INFO L354 Elim1Store]: treesize reduction 69, result has 10.4 percent of original size [2021-08-30 16:42:28,509 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 56 treesize of output 39 [2021-08-30 16:42:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 70 proven. 68 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:42:28,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:42:29,930 INFO L354 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2021-08-30 16:42:29,931 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 203 treesize of output 163 [2021-08-30 16:42:29,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:42:29,936 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 159 treesize of output 153 [2021-08-30 16:42:30,009 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-08-30 16:42:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-08-30 16:42:30,041 INFO L354 Elim1Store]: treesize reduction 3, result has 90.3 percent of original size [2021-08-30 16:42:30,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 86 [2021-08-30 16:42:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 75 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:42:32,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670328923] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:42:32,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:42:32,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 29] total 79 [2021-08-30 16:42:32,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743836841] [2021-08-30 16:42:32,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-30 16:42:32,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:42:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-30 16:42:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=5761, Unknown=0, NotChecked=0, Total=6162 [2021-08-30 16:42:32,641 INFO L87 Difference]: Start difference. First operand 1074 states and 1209 transitions. Second operand has 79 states, 77 states have (on average 2.675324675324675) internal successors, (206), 75 states have internal predecessors, (206), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:42:40,486 INFO L93 Difference]: Finished difference Result 1772 states and 1987 transitions. [2021-08-30 16:42:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-30 16:42:40,487 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 2.675324675324675) internal successors, (206), 75 states have internal predecessors, (206), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-08-30 16:42:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:42:40,489 INFO L225 Difference]: With dead ends: 1772 [2021-08-30 16:42:40,489 INFO L226 Difference]: Without dead ends: 1772 [2021-08-30 16:42:40,490 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6349 ImplicationChecksByTransitivity, 8805.83ms TimeCoverageRelationStatistics Valid=2612, Invalid=24778, Unknown=0, NotChecked=0, Total=27390 [2021-08-30 16:42:40,491 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 379 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 5067 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1708.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 6144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.03ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 5067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1010 IncrementalHoareTripleChecker+Unchecked, 2021.48ms IncrementalHoareTripleChecker+Time [2021-08-30 16:42:40,491 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 167 Invalid, 6144 Unknown, 0 Unchecked, 12.03ms Time], IncrementalHoareTripleChecker [67 Valid, 5067 Invalid, 0 Unknown, 1010 Unchecked, 2021.48ms Time] [2021-08-30 16:42:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-08-30 16:42:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1409. [2021-08-30 16:42:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1389 states have (on average 1.1339092872570193) internal successors, (1575), 1390 states have internal predecessors, (1575), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1593 transitions. [2021-08-30 16:42:40,503 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1593 transitions. Word has length 87 [2021-08-30 16:42:40,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:42:40,503 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 1593 transitions. [2021-08-30 16:42:40,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 2.675324675324675) internal successors, (206), 75 states have internal predecessors, (206), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1593 transitions. [2021-08-30 16:42:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-30 16:42:40,505 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:42:40,505 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 5, 5, 5, 5, 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] [2021-08-30 16:42:40,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-30 16:42:40,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:40,708 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:42:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:42:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash 926265240, now seen corresponding path program 5 times [2021-08-30 16:42:40,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:42:40,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280868515] [2021-08-30 16:42:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:42:40,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:42:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:40,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:42:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 107 proven. 94 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:42:40,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:42:40,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280868515] [2021-08-30 16:42:40,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280868515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:42:40,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067483850] [2021-08-30 16:42:40,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:42:40,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:40,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:42:40,918 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) [2021-08-30 16:42:40,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-30 16:42:41,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-30 16:42:41,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:42:41,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-30 16:42:41,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:42:41,039 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:42:41,039 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 [2021-08-30 16:42:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 118 proven. 83 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:42:41,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:42:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 118 proven. 83 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:42:41,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067483850] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:42:41,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:42:41,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 52 [2021-08-30 16:42:41,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839040143] [2021-08-30 16:42:41,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-30 16:42:41,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:42:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-30 16:42:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2293, Unknown=0, NotChecked=0, Total=2652 [2021-08-30 16:42:41,843 INFO L87 Difference]: Start difference. First operand 1409 states and 1593 transitions. Second operand has 52 states, 51 states have (on average 3.8627450980392157) internal successors, (197), 48 states have internal predecessors, (197), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:42,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:42:42,305 INFO L93 Difference]: Finished difference Result 2361 states and 2638 transitions. [2021-08-30 16:42:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-30 16:42:42,306 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.8627450980392157) internal successors, (197), 48 states have internal predecessors, (197), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-08-30 16:42:42,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:42:42,308 INFO L225 Difference]: With dead ends: 2361 [2021-08-30 16:42:42,308 INFO L226 Difference]: Without dead ends: 1985 [2021-08-30 16:42:42,309 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 682.77ms TimeCoverageRelationStatistics Valid=707, Invalid=3985, Unknown=0, NotChecked=0, Total=4692 [2021-08-30 16:42:42,309 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 212 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 233.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 274.55ms IncrementalHoareTripleChecker+Time [2021-08-30 16:42:42,310 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 46 Invalid, 1267 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [28 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 274.55ms Time] [2021-08-30 16:42:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-08-30 16:42:42,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1611. [2021-08-30 16:42:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1592 states have (on average 1.135678391959799) internal successors, (1808), 1593 states have internal predecessors, (1808), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 1825 transitions. [2021-08-30 16:42:42,322 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 1825 transitions. Word has length 88 [2021-08-30 16:42:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:42:42,323 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 1825 transitions. [2021-08-30 16:42:42,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.8627450980392157) internal successors, (197), 48 states have internal predecessors, (197), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 1825 transitions. [2021-08-30 16:42:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-30 16:42:42,324 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:42:42,324 INFO L513 BasicCegarLoop]: trace histogram [7, 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] [2021-08-30 16:42:42,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-30 16:42:42,548 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,SelfDestructingSolverStorable54 [2021-08-30 16:42:42,549 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:42:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:42:42,549 INFO L82 PathProgramCache]: Analyzing trace with hash 28166690, now seen corresponding path program 10 times [2021-08-30 16:42:42,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:42:42,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681262399] [2021-08-30 16:42:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:42:42,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:42:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:42,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:42:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:42:42,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:42:42,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681262399] [2021-08-30 16:42:42,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681262399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:42:42,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841226087] [2021-08-30 16:42:42,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:42:42,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:42:42,895 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) [2021-08-30 16:42:42,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-30 16:42:43,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:42:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:42:43,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-30 16:42:43,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:42:43,048 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:42:43,048 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 [2021-08-30 16:42:43,055 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 [2021-08-30 16:42:43,369 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 [2021-08-30 16:42:43,415 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-08-30 16:42:43,416 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 32 treesize of output 31 [2021-08-30 16:42:44,101 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 16:42:44,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2021-08-30 16:42:44,106 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-08-30 16:42:44,106 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 42 treesize of output 28 [2021-08-30 16:42:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 93 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:42:44,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:42:46,641 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 56 treesize of output 52 [2021-08-30 16:42:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 92 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:42:47,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841226087] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:42:47,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:42:47,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23, 23] total 70 [2021-08-30 16:42:47,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675204958] [2021-08-30 16:42:47,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-08-30 16:42:47,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:42:47,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-30 16:42:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=4553, Unknown=1, NotChecked=0, Total=4830 [2021-08-30 16:42:47,342 INFO L87 Difference]: Start difference. First operand 1611 states and 1825 transitions. Second operand has 70 states, 68 states have (on average 3.5294117647058822) internal successors, (240), 66 states have internal predecessors, (240), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:54,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:42:54,570 INFO L93 Difference]: Finished difference Result 2044 states and 2297 transitions. [2021-08-30 16:42:54,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-30 16:42:54,571 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 3.5294117647058822) internal successors, (240), 66 states have internal predecessors, (240), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-08-30 16:42:54,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:42:54,575 INFO L225 Difference]: With dead ends: 2044 [2021-08-30 16:42:54,575 INFO L226 Difference]: Without dead ends: 1992 [2021-08-30 16:42:54,577 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 9678.42ms TimeCoverageRelationStatistics Valid=1238, Invalid=15017, Unknown=1, NotChecked=0, Total=16256 [2021-08-30 16:42:54,577 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 278 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 717.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 3598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.26ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 906 IncrementalHoareTripleChecker+Unchecked, 864.97ms IncrementalHoareTripleChecker+Time [2021-08-30 16:42:54,578 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 218 Invalid, 3598 Unknown, 0 Unchecked, 6.26ms Time], IncrementalHoareTripleChecker [43 Valid, 2649 Invalid, 0 Unknown, 906 Unchecked, 864.97ms Time] [2021-08-30 16:42:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-08-30 16:42:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1901. [2021-08-30 16:42:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1877 states have (on average 1.1315929675013319) internal successors, (2124), 1878 states have internal predecessors, (2124), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2146 transitions. [2021-08-30 16:42:54,613 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2146 transitions. Word has length 90 [2021-08-30 16:42:54,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:42:54,613 INFO L470 AbstractCegarLoop]: Abstraction has 1901 states and 2146 transitions. [2021-08-30 16:42:54,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 3.5294117647058822) internal successors, (240), 66 states have internal predecessors, (240), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2146 transitions. [2021-08-30 16:42:54,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-30 16:42:54,615 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:42:54,615 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 6, 6, 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] [2021-08-30 16:42:54,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-30 16:42:54,848 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,SelfDestructingSolverStorable55 [2021-08-30 16:42:54,848 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:42:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:42:54,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1409547275, now seen corresponding path program 6 times [2021-08-30 16:42:54,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:42:54,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510970613] [2021-08-30 16:42:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:42:54,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:42:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:55,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:42:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:42:55,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:42:55,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510970613] [2021-08-30 16:42:55,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510970613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:42:55,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173335382] [2021-08-30 16:42:55,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:42:55,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:55,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:42:55,145 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) [2021-08-30 16:42:55,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-30 16:42:55,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-30 16:42:55,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:42:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-30 16:42:55,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:42:55,489 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 [2021-08-30 16:42:55,792 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 [2021-08-30 16:42:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:42:55,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:42:55,977 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 13 [2021-08-30 16:42:55,978 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 26 treesize of output 22 [2021-08-30 16:42:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:42:56,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173335382] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:42:56,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:42:56,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 24] total 46 [2021-08-30 16:42:56,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568600904] [2021-08-30 16:42:56,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-30 16:42:56,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:42:56,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-30 16:42:56,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1931, Unknown=0, NotChecked=0, Total=2070 [2021-08-30 16:42:56,148 INFO L87 Difference]: Start difference. First operand 1901 states and 2146 transitions. Second operand has 46 states, 43 states have (on average 3.488372093023256) internal successors, (150), 42 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:42:57,811 INFO L93 Difference]: Finished difference Result 2857 states and 3197 transitions. [2021-08-30 16:42:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-30 16:42:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 3.488372093023256) internal successors, (150), 42 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-08-30 16:42:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:42:57,815 INFO L225 Difference]: With dead ends: 2857 [2021-08-30 16:42:57,815 INFO L226 Difference]: Without dead ends: 2534 [2021-08-30 16:42:57,815 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1144.51ms TimeCoverageRelationStatistics Valid=375, Invalid=4181, Unknown=0, NotChecked=0, Total=4556 [2021-08-30 16:42:57,815 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 224 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 936.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 3808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.36ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1140.65ms IncrementalHoareTripleChecker+Time [2021-08-30 16:42:57,816 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 262 Invalid, 3808 Unknown, 0 Unchecked, 7.36ms Time], IncrementalHoareTripleChecker [37 Valid, 3678 Invalid, 0 Unknown, 93 Unchecked, 1140.65ms Time] [2021-08-30 16:42:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-08-30 16:42:57,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1925. [2021-08-30 16:42:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1901 states have (on average 1.1315097317201472) internal successors, (2151), 1902 states have internal predecessors, (2151), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2173 transitions. [2021-08-30 16:42:57,846 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2173 transitions. Word has length 92 [2021-08-30 16:42:57,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:42:57,846 INFO L470 AbstractCegarLoop]: Abstraction has 1925 states and 2173 transitions. [2021-08-30 16:42:57,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 3.488372093023256) internal successors, (150), 42 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:42:57,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2173 transitions. [2021-08-30 16:42:57,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-30 16:42:57,848 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:42:57,848 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:42:57,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-30 16:42:58,064 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,SelfDestructingSolverStorable56 [2021-08-30 16:42:58,065 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:42:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:42:58,065 INFO L82 PathProgramCache]: Analyzing trace with hash -331704427, now seen corresponding path program 17 times [2021-08-30 16:42:58,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:42:58,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983517485] [2021-08-30 16:42:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:42:58,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:42:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:58,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:42:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:42:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 10 proven. 154 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:42:58,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:42:58,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983517485] [2021-08-30 16:42:58,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983517485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:42:58,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546023217] [2021-08-30 16:42:58,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:42:58,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:42:58,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:42:58,362 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) [2021-08-30 16:42:58,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-30 16:42:58,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-30 16:42:58,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:42:58,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-30 16:42:58,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:42:58,496 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 [2021-08-30 16:42:58,770 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 [2021-08-30 16:42:58,805 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 [2021-08-30 16:42:59,643 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:42:59,643 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 [2021-08-30 16:42:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 11 proven. 153 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:42:59,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:43:00,549 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)) c_main_~nondetString1~0.base) (+ c_main_~nondetString1~0.offset 4)) 0)) is different from false [2021-08-30 16:43:00,552 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 56 treesize of output 50 [2021-08-30 16:43:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 10 proven. 154 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:43:00,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546023217] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:43:00,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:43:00,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2021-08-30 16:43:00,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784258731] [2021-08-30 16:43:00,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-30 16:43:00,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:43:00,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-30 16:43:00,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2207, Unknown=1, NotChecked=94, Total=2450 [2021-08-30 16:43:00,843 INFO L87 Difference]: Start difference. First operand 1925 states and 2173 transitions. Second operand has 50 states, 48 states have (on average 3.5625) internal successors, (171), 46 states have internal predecessors, (171), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:43:02,458 INFO L93 Difference]: Finished difference Result 2222 states and 2490 transitions. [2021-08-30 16:43:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-30 16:43:02,459 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 3.5625) internal successors, (171), 46 states have internal predecessors, (171), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-08-30 16:43:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:43:02,461 INFO L225 Difference]: With dead ends: 2222 [2021-08-30 16:43:02,461 INFO L226 Difference]: Without dead ends: 2158 [2021-08-30 16:43:02,462 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2820.27ms TimeCoverageRelationStatistics Valid=224, Invalid=3319, Unknown=1, NotChecked=116, Total=3660 [2021-08-30 16:43:02,462 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 94 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 340.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.42ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 413.28ms IncrementalHoareTripleChecker+Time [2021-08-30 16:43:02,462 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 106 Invalid, 1753 Unknown, 0 Unchecked, 2.42ms Time], IncrementalHoareTripleChecker [12 Valid, 1426 Invalid, 0 Unknown, 315 Unchecked, 413.28ms Time] [2021-08-30 16:43:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-08-30 16:43:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2061. [2021-08-30 16:43:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2037 states have (on average 1.1310751104565537) internal successors, (2304), 2038 states have internal predecessors, (2304), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 2326 transitions. [2021-08-30 16:43:02,512 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 2326 transitions. Word has length 92 [2021-08-30 16:43:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:43:02,512 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 2326 transitions. [2021-08-30 16:43:02,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 3.5625) internal successors, (171), 46 states have internal predecessors, (171), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 2326 transitions. [2021-08-30 16:43:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-30 16:43:02,514 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:43:02,515 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:43:02,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-30 16:43:02,715 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,SelfDestructingSolverStorable57 [2021-08-30 16:43:02,715 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:43:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:43:02,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1794974495, now seen corresponding path program 18 times [2021-08-30 16:43:02,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:43:02,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599062299] [2021-08-30 16:43:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:43:02,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:43:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:02,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:43:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 10 proven. 154 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:43:02,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:43:02,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599062299] [2021-08-30 16:43:02,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599062299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:43:02,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939950218] [2021-08-30 16:43:02,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:43:02,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:02,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:43:02,965 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) [2021-08-30 16:43:02,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-30 16:43:03,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-30 16:43:03,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:43:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-30 16:43:03,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:43:03,098 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 [2021-08-30 16:43:03,248 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 [2021-08-30 16:43:03,278 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:43:03,279 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 [2021-08-30 16:43:03,952 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:43:03,953 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 [2021-08-30 16:43:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 11 proven. 153 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:43:03,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:43:06,822 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 13 [2021-08-30 16:43:06,823 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 26 treesize of output 22 [2021-08-30 16:43:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 10 proven. 154 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:43:07,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939950218] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:43:07,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:43:07,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 49 [2021-08-30 16:43:07,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198604656] [2021-08-30 16:43:07,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-30 16:43:07,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:43:07,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-30 16:43:07,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2021-08-30 16:43:07,066 INFO L87 Difference]: Start difference. First operand 2061 states and 2326 transitions. Second operand has 49 states, 48 states have (on average 3.5625) internal successors, (171), 45 states have internal predecessors, (171), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:08,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:43:08,185 INFO L93 Difference]: Finished difference Result 2549 states and 2858 transitions. [2021-08-30 16:43:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-30 16:43:08,185 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.5625) internal successors, (171), 45 states have internal predecessors, (171), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-08-30 16:43:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:43:08,188 INFO L225 Difference]: With dead ends: 2549 [2021-08-30 16:43:08,188 INFO L226 Difference]: Without dead ends: 2357 [2021-08-30 16:43:08,188 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 3929.55ms TimeCoverageRelationStatistics Valid=257, Invalid=3903, Unknown=0, NotChecked=0, Total=4160 [2021-08-30 16:43:08,188 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 110 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 501.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.93ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 631.08ms IncrementalHoareTripleChecker+Time [2021-08-30 16:43:08,189 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 189 Invalid, 2678 Unknown, 0 Unchecked, 2.93ms Time], IncrementalHoareTripleChecker [17 Valid, 1868 Invalid, 0 Unknown, 793 Unchecked, 631.08ms Time] [2021-08-30 16:43:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-08-30 16:43:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2061. [2021-08-30 16:43:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2037 states have (on average 1.12960235640648) internal successors, (2301), 2038 states have internal predecessors, (2301), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 2323 transitions. [2021-08-30 16:43:08,203 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 2323 transitions. Word has length 92 [2021-08-30 16:43:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:43:08,204 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 2323 transitions. [2021-08-30 16:43:08,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.5625) internal successors, (171), 45 states have internal predecessors, (171), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 2323 transitions. [2021-08-30 16:43:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-30 16:43:08,206 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:43:08,206 INFO L513 BasicCegarLoop]: trace histogram [7, 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] [2021-08-30 16:43:08,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-30 16:43:08,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:08,423 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:43:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:43:08,424 INFO L82 PathProgramCache]: Analyzing trace with hash -140069249, now seen corresponding path program 11 times [2021-08-30 16:43:08,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:43:08,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562877059] [2021-08-30 16:43:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:43:08,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:43:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:08,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:43:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:43:08,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:43:08,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562877059] [2021-08-30 16:43:08,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562877059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:43:08,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844010416] [2021-08-30 16:43:08,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:43:08,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:43:08,680 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) [2021-08-30 16:43:08,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-30 16:43:08,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-30 16:43:08,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:43:08,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 77 conjunts are in the unsatisfiable core [2021-08-30 16:43:08,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:43:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:43:09,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:43:09,736 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 21 treesize of output 17 [2021-08-30 16:43:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:43:10,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844010416] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:43:10,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:43:10,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 47 [2021-08-30 16:43:10,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799427749] [2021-08-30 16:43:10,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-30 16:43:10,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:43:10,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-30 16:43:10,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2006, Unknown=0, NotChecked=0, Total=2256 [2021-08-30 16:43:10,058 INFO L87 Difference]: Start difference. First operand 2061 states and 2323 transitions. Second operand has 48 states, 47 states have (on average 4.531914893617022) internal successors, (213), 44 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:43:11,336 INFO L93 Difference]: Finished difference Result 2767 states and 3129 transitions. [2021-08-30 16:43:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-30 16:43:11,337 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.531914893617022) internal successors, (213), 44 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-08-30 16:43:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:43:11,340 INFO L225 Difference]: With dead ends: 2767 [2021-08-30 16:43:11,340 INFO L226 Difference]: Without dead ends: 2767 [2021-08-30 16:43:11,341 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1024.45ms TimeCoverageRelationStatistics Valid=507, Invalid=3915, Unknown=0, NotChecked=0, Total=4422 [2021-08-30 16:43:11,341 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 251 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 3106 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 749.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 3134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.32ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 917.06ms IncrementalHoareTripleChecker+Time [2021-08-30 16:43:11,341 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 103 Invalid, 3134 Unknown, 0 Unchecked, 6.32ms Time], IncrementalHoareTripleChecker [28 Valid, 3106 Invalid, 0 Unknown, 0 Unchecked, 917.06ms Time] [2021-08-30 16:43:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-08-30 16:43:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2186. [2021-08-30 16:43:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2162 states have (on average 1.1304347826086956) internal successors, (2444), 2163 states have internal predecessors, (2444), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 2466 transitions. [2021-08-30 16:43:11,363 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 2466 transitions. Word has length 94 [2021-08-30 16:43:11,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:43:11,363 INFO L470 AbstractCegarLoop]: Abstraction has 2186 states and 2466 transitions. [2021-08-30 16:43:11,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.531914893617022) internal successors, (213), 44 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 2466 transitions. [2021-08-30 16:43:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-30 16:43:11,365 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:43:11,366 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 7, 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] [2021-08-30 16:43:11,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-30 16:43:11,584 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,SelfDestructingSolverStorable59 [2021-08-30 16:43:11,585 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:43:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:43:11,585 INFO L82 PathProgramCache]: Analyzing trace with hash -224992814, now seen corresponding path program 7 times [2021-08-30 16:43:11,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:43:11,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364259565] [2021-08-30 16:43:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:43:11,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:43:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:11,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:43:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 45 proven. 202 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:43:11,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:43:11,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364259565] [2021-08-30 16:43:11,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364259565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:43:11,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426010063] [2021-08-30 16:43:11,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:43:11,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:11,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:43:11,929 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) [2021-08-30 16:43:11,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-30 16:43:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:12,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 81 conjunts are in the unsatisfiable core [2021-08-30 16:43:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:43:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 66 proven. 181 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:43:12,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:43:12,774 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 5 treesize of output 3 [2021-08-30 16:43:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 66 proven. 181 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:43:12,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426010063] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:43:12,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:43:12,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 50 [2021-08-30 16:43:12,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418928782] [2021-08-30 16:43:12,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-30 16:43:12,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:43:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-30 16:43:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2021-08-30 16:43:12,822 INFO L87 Difference]: Start difference. First operand 2186 states and 2466 transitions. Second operand has 51 states, 47 states have (on average 4.0212765957446805) internal successors, (189), 47 states have internal predecessors, (189), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:14,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:43:14,188 INFO L93 Difference]: Finished difference Result 2836 states and 3174 transitions. [2021-08-30 16:43:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-30 16:43:14,188 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 4.0212765957446805) internal successors, (189), 47 states have internal predecessors, (189), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-08-30 16:43:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:43:14,191 INFO L225 Difference]: With dead ends: 2836 [2021-08-30 16:43:14,191 INFO L226 Difference]: Without dead ends: 2836 [2021-08-30 16:43:14,191 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 1031.75ms TimeCoverageRelationStatistics Valid=583, Invalid=4529, Unknown=0, NotChecked=0, Total=5112 [2021-08-30 16:43:14,192 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 245 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 3442 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 783.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 3470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.95ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 941.10ms IncrementalHoareTripleChecker+Time [2021-08-30 16:43:14,192 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 100 Invalid, 3470 Unknown, 0 Unchecked, 4.95ms Time], IncrementalHoareTripleChecker [28 Valid, 3442 Invalid, 0 Unknown, 0 Unchecked, 941.10ms Time] [2021-08-30 16:43:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2021-08-30 16:43:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2256. [2021-08-30 16:43:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2232 states have (on average 1.132168458781362) internal successors, (2527), 2233 states have internal predecessors, (2527), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 2549 transitions. [2021-08-30 16:43:14,237 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 2549 transitions. Word has length 96 [2021-08-30 16:43:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:43:14,237 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 2549 transitions. [2021-08-30 16:43:14,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 4.0212765957446805) internal successors, (189), 47 states have internal predecessors, (189), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:14,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 2549 transitions. [2021-08-30 16:43:14,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-30 16:43:14,240 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:43:14,240 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:43:14,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-30 16:43:14,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:14,457 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:43:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:43:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash 773540880, now seen corresponding path program 19 times [2021-08-30 16:43:14,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:43:14,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997953041] [2021-08-30 16:43:14,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:43:14,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:43:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:14,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:43:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 10 proven. 184 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:43:14,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:43:14,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997953041] [2021-08-30 16:43:14,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997953041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:43:14,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292434350] [2021-08-30 16:43:14,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:43:14,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:14,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:43:14,694 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) [2021-08-30 16:43:14,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-30 16:43:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 132 conjunts are in the unsatisfiable core [2021-08-30 16:43:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:43:14,816 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:43:14,817 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 [2021-08-30 16:43:15,093 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 [2021-08-30 16:43:15,129 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-30 16:43:15,129 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 33 treesize of output 32 [2021-08-30 16:43:16,107 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:43:16,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 49 [2021-08-30 16:43:16,469 INFO L354 Elim1Store]: treesize reduction 75, result has 9.6 percent of original size [2021-08-30 16:43:16,470 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 59 treesize of output 40 [2021-08-30 16:43:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 10 proven. 199 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:43:16,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:43:18,787 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:43:18,788 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 224 treesize of output 184 [2021-08-30 16:43:18,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:43:18,794 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 180 treesize of output 174 [2021-08-30 16:43:18,879 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-08-30 16:43:18,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-08-30 16:43:18,903 INFO L354 Elim1Store]: treesize reduction 13, result has 66.7 percent of original size [2021-08-30 16:43:18,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 88 [2021-08-30 16:43:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 20 proven. 189 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:43:19,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292434350] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:43:19,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:43:19,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 35, 35] total 87 [2021-08-30 16:43:19,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920366746] [2021-08-30 16:43:19,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-30 16:43:19,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:43:19,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-30 16:43:19,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=7073, Unknown=1, NotChecked=0, Total=7482 [2021-08-30 16:43:19,872 INFO L87 Difference]: Start difference. First operand 2256 states and 2549 transitions. Second operand has 87 states, 85 states have (on average 2.847058823529412) internal successors, (242), 83 states have internal predecessors, (242), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:43:21,904 INFO L93 Difference]: Finished difference Result 2590 states and 2903 transitions. [2021-08-30 16:43:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-30 16:43:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 85 states have (on average 2.847058823529412) internal successors, (242), 83 states have internal predecessors, (242), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-08-30 16:43:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:43:21,930 INFO L225 Difference]: With dead ends: 2590 [2021-08-30 16:43:21,931 INFO L226 Difference]: Without dead ends: 2438 [2021-08-30 16:43:21,932 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3324 ImplicationChecksByTransitivity, 5101.85ms TimeCoverageRelationStatistics Valid=806, Invalid=14199, Unknown=1, NotChecked=0, Total=15006 [2021-08-30 16:43:21,932 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 489.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.92ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 584.79ms IncrementalHoareTripleChecker+Time [2021-08-30 16:43:21,932 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 148 Invalid, 2227 Unknown, 0 Unchecked, 3.92ms Time], IncrementalHoareTripleChecker [22 Valid, 1630 Invalid, 0 Unknown, 575 Unchecked, 584.79ms Time] [2021-08-30 16:43:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-08-30 16:43:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2224. [2021-08-30 16:43:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2200 states have (on average 1.1322727272727273) internal successors, (2491), 2201 states have internal predecessors, (2491), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:21,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 2513 transitions. [2021-08-30 16:43:21,968 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 2513 transitions. Word has length 97 [2021-08-30 16:43:21,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:43:21,968 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 2513 transitions. [2021-08-30 16:43:21,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 85 states have (on average 2.847058823529412) internal successors, (242), 83 states have internal predecessors, (242), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:21,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 2513 transitions. [2021-08-30 16:43:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-30 16:43:21,971 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:43:21,971 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:43:22,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-30 16:43:22,190 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,SelfDestructingSolverStorable61 [2021-08-30 16:43:22,190 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:43:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:43:22,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1796592742, now seen corresponding path program 20 times [2021-08-30 16:43:22,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:43:22,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916372750] [2021-08-30 16:43:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:43:22,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:43:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:22,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:43:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 10 proven. 184 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:43:22,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:43:22,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916372750] [2021-08-30 16:43:22,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916372750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:43:22,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157524940] [2021-08-30 16:43:22,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:43:22,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:22,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:43:22,455 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) [2021-08-30 16:43:22,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-30 16:43:22,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:43:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:43:22,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 130 conjunts are in the unsatisfiable core [2021-08-30 16:43:22,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:43:22,576 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 [2021-08-30 16:43:22,911 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 [2021-08-30 16:43:22,960 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 [2021-08-30 16:43:24,472 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:43:24,473 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 52 treesize of output 34 [2021-08-30 16:43:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 10 proven. 193 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:43:24,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:43:25,993 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~length2~0 Int)) (let ((.cse0 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) c_main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse1 (select .cse0 (+ c_main_~nondetString2~0.offset 1)))) (or (not (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse0) c_main_~nondetString1~0.base) (+ c_main_~nondetString1~0.offset 4)) .cse1)) (= .cse1 0))))) is different from false [2021-08-30 16:43:26,007 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:43:26,007 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-08-30 16:43:26,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:43:26,012 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 173 treesize of output 167 [2021-08-30 16:43:26,080 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-08-30 16:43:26,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-08-30 16:43:26,136 INFO L354 Elim1Store]: treesize reduction 13, result has 66.7 percent of original size [2021-08-30 16:43:26,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 88 [2021-08-30 16:43:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 20 proven. 183 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:43:26,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157524940] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:43:26,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:43:26,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 31] total 79 [2021-08-30 16:43:26,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612645145] [2021-08-30 16:43:26,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-30 16:43:26,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:43:26,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-30 16:43:26,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=5705, Unknown=1, NotChecked=152, Total=6162 [2021-08-30 16:43:26,549 INFO L87 Difference]: Start difference. First operand 2224 states and 2513 transitions. Second operand has 79 states, 77 states have (on average 3.038961038961039) internal successors, (234), 75 states have internal predecessors, (234), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:29,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:43:29,194 INFO L93 Difference]: Finished difference Result 2673 states and 2994 transitions. [2021-08-30 16:43:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-30 16:43:29,195 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 3.038961038961039) internal successors, (234), 75 states have internal predecessors, (234), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-08-30 16:43:29,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:43:29,197 INFO L225 Difference]: With dead ends: 2673 [2021-08-30 16:43:29,197 INFO L226 Difference]: Without dead ends: 2577 [2021-08-30 16:43:29,197 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 4721.08ms TimeCoverageRelationStatistics Valid=547, Invalid=11012, Unknown=1, NotChecked=212, Total=11772 [2021-08-30 16:43:29,198 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 111 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 468.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.03ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 565.12ms IncrementalHoareTripleChecker+Time [2021-08-30 16:43:29,198 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 140 Invalid, 2102 Unknown, 0 Unchecked, 4.03ms Time], IncrementalHoareTripleChecker [11 Valid, 1709 Invalid, 0 Unknown, 382 Unchecked, 565.12ms Time] [2021-08-30 16:43:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-08-30 16:43:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2333. [2021-08-30 16:43:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2309 states have (on average 1.1320918146383716) internal successors, (2614), 2310 states have internal predecessors, (2614), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 2636 transitions. [2021-08-30 16:43:29,236 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 2636 transitions. Word has length 97 [2021-08-30 16:43:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:43:29,236 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 2636 transitions. [2021-08-30 16:43:29,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 3.038961038961039) internal successors, (234), 75 states have internal predecessors, (234), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 2636 transitions. [2021-08-30 16:43:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-30 16:43:29,239 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:43:29,239 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:43:29,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-30 16:43:29,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:29,439 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:43:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:43:29,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1592196058, now seen corresponding path program 21 times [2021-08-30 16:43:29,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:43:29,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664333999] [2021-08-30 16:43:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:43:29,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:43:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:29,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:43:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 10 proven. 184 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:43:29,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:43:29,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664333999] [2021-08-30 16:43:29,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664333999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:43:29,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136089961] [2021-08-30 16:43:29,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:43:29,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:29,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:43:29,748 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) [2021-08-30 16:43:29,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-30 16:43:29,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-30 16:43:29,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:43:29,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-30 16:43:29,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:43:29,885 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 [2021-08-30 16:43:30,106 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 [2021-08-30 16:43:30,141 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:43:30,141 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 [2021-08-30 16:43:30,838 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:43:30,838 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 [2021-08-30 16:43:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 11 proven. 183 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:43:30,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:43:36,833 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 13 [2021-08-30 16:43:36,835 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 26 treesize of output 22 [2021-08-30 16:43:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 10 proven. 184 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:43:37,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136089961] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:43:37,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:43:37,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 49 [2021-08-30 16:43:37,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623075882] [2021-08-30 16:43:37,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-30 16:43:37,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:43:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-30 16:43:37,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2021-08-30 16:43:37,100 INFO L87 Difference]: Start difference. First operand 2333 states and 2636 transitions. Second operand has 49 states, 48 states have (on average 3.6041666666666665) internal successors, (173), 45 states have internal predecessors, (173), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:43:37,861 INFO L93 Difference]: Finished difference Result 2537 states and 2843 transitions. [2021-08-30 16:43:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-30 16:43:37,862 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.6041666666666665) internal successors, (173), 45 states have internal predecessors, (173), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-08-30 16:43:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:43:37,864 INFO L225 Difference]: With dead ends: 2537 [2021-08-30 16:43:37,864 INFO L226 Difference]: Without dead ends: 2473 [2021-08-30 16:43:37,864 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 6960.85ms TimeCoverageRelationStatistics Valid=235, Invalid=3425, Unknown=0, NotChecked=0, Total=3660 [2021-08-30 16:43:37,865 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 88 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 357.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.42ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 435.94ms IncrementalHoareTripleChecker+Time [2021-08-30 16:43:37,866 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 197 Invalid, 1996 Unknown, 0 Unchecked, 3.42ms Time], IncrementalHoareTripleChecker [17 Valid, 1609 Invalid, 0 Unknown, 370 Unchecked, 435.94ms Time] [2021-08-30 16:43:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-08-30 16:43:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2333. [2021-08-30 16:43:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2309 states have (on average 1.1320918146383716) internal successors, (2614), 2310 states have internal predecessors, (2614), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 2636 transitions. [2021-08-30 16:43:37,883 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 2636 transitions. Word has length 97 [2021-08-30 16:43:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:43:37,883 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 2636 transitions. [2021-08-30 16:43:37,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.6041666666666665) internal successors, (173), 45 states have internal predecessors, (173), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 2636 transitions. [2021-08-30 16:43:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-30 16:43:37,886 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:43:37,886 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:43:37,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-30 16:43:38,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:38,101 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:43:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:43:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash -960653028, now seen corresponding path program 22 times [2021-08-30 16:43:38,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:43:38,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331915545] [2021-08-30 16:43:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:43:38,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:43:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:38,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:43:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 191 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:43:38,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:43:38,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331915545] [2021-08-30 16:43:38,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331915545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:43:38,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529211811] [2021-08-30 16:43:38,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:43:38,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:38,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:43:38,501 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) [2021-08-30 16:43:38,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-30 16:43:38,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:43:38,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:43:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 71 conjunts are in the unsatisfiable core [2021-08-30 16:43:38,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:43:38,626 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:43:38,626 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 [2021-08-30 16:43:38,635 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 [2021-08-30 16:43:39,104 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 [2021-08-30 16:43:39,131 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-08-30 16:43:39,131 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 32 treesize of output 31 [2021-08-30 16:43:39,791 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 16:43:39,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2021-08-30 16:43:39,796 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-08-30 16:43:39,796 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 42 treesize of output 28 [2021-08-30 16:43:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 94 proven. 109 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:43:39,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:43:42,087 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 56 treesize of output 52 [2021-08-30 16:43:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 92 proven. 111 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:43:42,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529211811] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:43:42,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:43:42,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 61 [2021-08-30 16:43:42,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133663891] [2021-08-30 16:43:42,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-30 16:43:42,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:43:42,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-30 16:43:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=3401, Unknown=2, NotChecked=0, Total=3660 [2021-08-30 16:43:42,664 INFO L87 Difference]: Start difference. First operand 2333 states and 2636 transitions. Second operand has 61 states, 59 states have (on average 4.016949152542373) internal successors, (237), 57 states have internal predecessors, (237), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:43:44,577 INFO L93 Difference]: Finished difference Result 2501 states and 2809 transitions. [2021-08-30 16:43:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-30 16:43:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 4.016949152542373) internal successors, (237), 57 states have internal predecessors, (237), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-08-30 16:43:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:43:44,579 INFO L225 Difference]: With dead ends: 2501 [2021-08-30 16:43:44,579 INFO L226 Difference]: Without dead ends: 2429 [2021-08-30 16:43:44,580 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 4436.57ms TimeCoverageRelationStatistics Valid=895, Invalid=9815, Unknown=2, NotChecked=0, Total=10712 [2021-08-30 16:43:44,581 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 253 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 425.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 508.55ms IncrementalHoareTripleChecker+Time [2021-08-30 16:43:44,581 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 149 Invalid, 2337 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [48 Valid, 1745 Invalid, 0 Unknown, 544 Unchecked, 508.55ms Time] [2021-08-30 16:43:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-08-30 16:43:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2293. [2021-08-30 16:43:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2269 states have (on average 1.132657558395769) internal successors, (2570), 2270 states have internal predecessors, (2570), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 2592 transitions. [2021-08-30 16:43:44,596 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 2592 transitions. Word has length 99 [2021-08-30 16:43:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:43:44,596 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 2592 transitions. [2021-08-30 16:43:44,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 4.016949152542373) internal successors, (237), 57 states have internal predecessors, (237), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 2592 transitions. [2021-08-30 16:43:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-30 16:43:44,599 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:43:44,599 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:43:44,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-30 16:43:44,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:44,816 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:43:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:43:44,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2125971118, now seen corresponding path program 23 times [2021-08-30 16:43:44,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:43:44,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563113816] [2021-08-30 16:43:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:43:44,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:43:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:45,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:43:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:43:45,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:43:45,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563113816] [2021-08-30 16:43:45,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563113816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:43:45,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296097327] [2021-08-30 16:43:45,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:43:45,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:45,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:43:45,283 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) [2021-08-30 16:43:45,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-30 16:43:45,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-30 16:43:45,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:43:45,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 165 conjunts are in the unsatisfiable core [2021-08-30 16:43:45,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:43:45,827 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 [2021-08-30 16:43:45,883 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:43:45,883 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 31 treesize of output 30 [2021-08-30 16:43:48,441 INFO L354 Elim1Store]: treesize reduction 101, result has 16.5 percent of original size [2021-08-30 16:43:48,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 49 [2021-08-30 16:43:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 195 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:43:48,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:43:49,777 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-08-30 16:43:49,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 428 treesize of output 326 [2021-08-30 16:43:49,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:43:49,783 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 318 treesize of output 298 [2021-08-30 16:43:49,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:43:49,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:43:49,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:43:49,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 29 [2021-08-30 16:43:49,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:43:49,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:43:49,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:43:49,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:43:49,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:43:49,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 202 [2021-08-30 16:43:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 28 proven. 179 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:43:52,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296097327] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:43:52,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:43:52,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 42, 41] total 103 [2021-08-30 16:43:52,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744361549] [2021-08-30 16:43:52,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-08-30 16:43:52,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:43:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-08-30 16:43:52,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=9989, Unknown=0, NotChecked=0, Total=10506 [2021-08-30 16:43:52,117 INFO L87 Difference]: Start difference. First operand 2293 states and 2592 transitions. Second operand has 103 states, 101 states have (on average 2.4554455445544554) internal successors, (248), 99 states have internal predecessors, (248), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:43:59,154 INFO L93 Difference]: Finished difference Result 3355 states and 3799 transitions. [2021-08-30 16:43:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-08-30 16:43:59,154 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 101 states have (on average 2.4554455445544554) internal successors, (248), 99 states have internal predecessors, (248), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-08-30 16:43:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:43:59,156 INFO L225 Difference]: With dead ends: 3355 [2021-08-30 16:43:59,156 INFO L226 Difference]: Without dead ends: 3355 [2021-08-30 16:43:59,158 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10969 ImplicationChecksByTransitivity, 8935.52ms TimeCoverageRelationStatistics Valid=1841, Invalid=38359, Unknown=0, NotChecked=0, Total=40200 [2021-08-30 16:43:59,159 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 397 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 5262 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1725.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 7406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.19ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2102 IncrementalHoareTripleChecker+Unchecked, 2051.47ms IncrementalHoareTripleChecker+Time [2021-08-30 16:43:59,159 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 261 Invalid, 7406 Unknown, 0 Unchecked, 14.19ms Time], IncrementalHoareTripleChecker [42 Valid, 5262 Invalid, 0 Unknown, 2102 Unchecked, 2051.47ms Time] [2021-08-30 16:43:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2021-08-30 16:43:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 3252. [2021-08-30 16:43:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3252 states, 3228 states have (on average 1.1415737298636928) internal successors, (3685), 3229 states have internal predecessors, (3685), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3252 states to 3252 states and 3707 transitions. [2021-08-30 16:43:59,181 INFO L78 Accepts]: Start accepts. Automaton has 3252 states and 3707 transitions. Word has length 99 [2021-08-30 16:43:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:43:59,181 INFO L470 AbstractCegarLoop]: Abstraction has 3252 states and 3707 transitions. [2021-08-30 16:43:59,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 101 states have (on average 2.4554455445544554) internal successors, (248), 99 states have internal predecessors, (248), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:43:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3252 states and 3707 transitions. [2021-08-30 16:43:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-30 16:43:59,184 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:43:59,184 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:43:59,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-30 16:43:59,401 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,SelfDestructingSolverStorable65 [2021-08-30 16:43:59,401 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:43:59,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:43:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash 668534314, now seen corresponding path program 24 times [2021-08-30 16:43:59,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:43:59,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562648208] [2021-08-30 16:43:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:43:59,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:43:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:59,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:43:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:43:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:43:59,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:43:59,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562648208] [2021-08-30 16:43:59,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562648208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:43:59,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817891553] [2021-08-30 16:43:59,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:43:59,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:43:59,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:43:59,887 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:43:59,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-30 16:44:00,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-30 16:44:00,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:44:00,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-30 16:44:00,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:44:00,049 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 [2021-08-30 16:44:00,379 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 [2021-08-30 16:44:00,456 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:44:00,456 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 [2021-08-30 16:44:01,270 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:44:01,284 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 [2021-08-30 16:44:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:44:01,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:44:06,907 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 13 [2021-08-30 16:44:06,909 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 26 treesize of output 22 [2021-08-30 16:44:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:44:07,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817891553] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:44:07,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:44:07,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23, 22] total 67 [2021-08-30 16:44:07,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585990168] [2021-08-30 16:44:07,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-30 16:44:07,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:44:07,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-30 16:44:07,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4233, Unknown=0, NotChecked=0, Total=4422 [2021-08-30 16:44:07,311 INFO L87 Difference]: Start difference. First operand 3252 states and 3707 transitions. Second operand has 67 states, 66 states have (on average 3.5454545454545454) internal successors, (234), 63 states have internal predecessors, (234), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:44:09,823 INFO L93 Difference]: Finished difference Result 4280 states and 4844 transitions. [2021-08-30 16:44:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-30 16:44:09,823 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.5454545454545454) internal successors, (234), 63 states have internal predecessors, (234), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-08-30 16:44:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:44:09,826 INFO L225 Difference]: With dead ends: 4280 [2021-08-30 16:44:09,827 INFO L226 Difference]: Without dead ends: 4216 [2021-08-30 16:44:09,828 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 8249.71ms TimeCoverageRelationStatistics Valid=489, Invalid=11501, Unknown=0, NotChecked=0, Total=11990 [2021-08-30 16:44:09,831 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 147 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 3773 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 823.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 5029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.75ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1237 IncrementalHoareTripleChecker+Unchecked, 1001.47ms IncrementalHoareTripleChecker+Time [2021-08-30 16:44:09,831 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 287 Invalid, 5029 Unknown, 0 Unchecked, 7.75ms Time], IncrementalHoareTripleChecker [19 Valid, 3773 Invalid, 0 Unknown, 1237 Unchecked, 1001.47ms Time] [2021-08-30 16:44:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4216 states. [2021-08-30 16:44:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4216 to 3497. [2021-08-30 16:44:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3473 states have (on average 1.1405125251943564) internal successors, (3961), 3474 states have internal predecessors, (3961), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 3983 transitions. [2021-08-30 16:44:09,879 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 3983 transitions. Word has length 99 [2021-08-30 16:44:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:44:09,879 INFO L470 AbstractCegarLoop]: Abstraction has 3497 states and 3983 transitions. [2021-08-30 16:44:09,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.5454545454545454) internal successors, (234), 63 states have internal predecessors, (234), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 3983 transitions. [2021-08-30 16:44:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-08-30 16:44:09,894 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:44:09,894 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 7, 7, 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] [2021-08-30 16:44:09,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-30 16:44:10,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-30 16:44:10,101 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:44:10,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:44:10,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1789532627, now seen corresponding path program 8 times [2021-08-30 16:44:10,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:44:10,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992960834] [2021-08-30 16:44:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:44:10,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:44:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:10,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:44:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 26 proven. 263 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:44:10,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:44:10,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992960834] [2021-08-30 16:44:10,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992960834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:44:10,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812994394] [2021-08-30 16:44:10,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:44:10,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:44:10,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:44:10,431 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:44:10,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-30 16:44:10,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:44:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:44:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 95 conjunts are in the unsatisfiable core [2021-08-30 16:44:10,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:44:10,729 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 25 treesize of output 21 [2021-08-30 16:44:11,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:44:11,789 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 35 treesize of output 35 [2021-08-30 16:44:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 66 proven. 223 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:44:11,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:44:12,779 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 36 treesize of output 34 [2021-08-30 16:44:12,786 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 46 treesize of output 42 [2021-08-30 16:44:12,788 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 38 treesize of output 30 [2021-08-30 16:44:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 66 proven. 223 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:44:12,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812994394] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:44:12,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:44:12,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 71 [2021-08-30 16:44:12,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338292347] [2021-08-30 16:44:12,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-30 16:44:12,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:44:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-30 16:44:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=4672, Unknown=0, NotChecked=0, Total=4970 [2021-08-30 16:44:12,839 INFO L87 Difference]: Start difference. First operand 3497 states and 3983 transitions. Second operand has 71 states, 68 states have (on average 3.514705882352941) internal successors, (239), 67 states have internal predecessors, (239), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:44:15,094 INFO L93 Difference]: Finished difference Result 5397 states and 6137 transitions. [2021-08-30 16:44:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-30 16:44:15,094 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 68 states have (on average 3.514705882352941) internal successors, (239), 67 states have internal predecessors, (239), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-08-30 16:44:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:44:15,097 INFO L225 Difference]: With dead ends: 5397 [2021-08-30 16:44:15,097 INFO L226 Difference]: Without dead ends: 5279 [2021-08-30 16:44:15,098 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3194 ImplicationChecksByTransitivity, 3138.31ms TimeCoverageRelationStatistics Valid=885, Invalid=12687, Unknown=0, NotChecked=0, Total=13572 [2021-08-30 16:44:15,099 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 222 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 437.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.63ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1046 IncrementalHoareTripleChecker+Unchecked, 517.01ms IncrementalHoareTripleChecker+Time [2021-08-30 16:44:15,099 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 240 Invalid, 3135 Unknown, 0 Unchecked, 3.63ms Time], IncrementalHoareTripleChecker [31 Valid, 2058 Invalid, 0 Unknown, 1046 Unchecked, 517.01ms Time] [2021-08-30 16:44:15,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5279 states. [2021-08-30 16:44:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5279 to 4307. [2021-08-30 16:44:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4307 states, 4277 states have (on average 1.14309095160159) internal successors, (4889), 4278 states have internal predecessors, (4889), 27 states have call successors, (27), 27 states have call predecessors, (27), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:15,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 4917 transitions. [2021-08-30 16:44:15,132 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 4917 transitions. Word has length 101 [2021-08-30 16:44:15,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:44:15,132 INFO L470 AbstractCegarLoop]: Abstraction has 4307 states and 4917 transitions. [2021-08-30 16:44:15,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 68 states have (on average 3.514705882352941) internal successors, (239), 67 states have internal predecessors, (239), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 4917 transitions. [2021-08-30 16:44:15,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-30 16:44:15,135 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:44:15,136 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 5, 5, 5, 4, 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] [2021-08-30 16:44:15,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-30 16:44:15,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-30 16:44:15,353 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:44:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:44:15,353 INFO L82 PathProgramCache]: Analyzing trace with hash 814773035, now seen corresponding path program 25 times [2021-08-30 16:44:15,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:44:15,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320000360] [2021-08-30 16:44:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:44:15,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:44:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:15,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:44:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 10 proven. 219 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:44:15,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:44:15,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320000360] [2021-08-30 16:44:15,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320000360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:44:15,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256542541] [2021-08-30 16:44:15,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:44:15,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:44:15,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:44:15,639 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:44:15,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-30 16:44:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-30 16:44:15,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:44:15,785 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 [2021-08-30 16:44:16,038 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 [2021-08-30 16:44:16,080 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:44:16,080 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 [2021-08-30 16:44:17,064 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:44:17,065 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 [2021-08-30 16:44:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 11 proven. 218 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:44:17,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:44:19,706 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 13 [2021-08-30 16:44:19,707 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 26 treesize of output 22 [2021-08-30 16:44:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 10 proven. 219 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:44:19,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256542541] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:44:19,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:44:19,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 49 [2021-08-30 16:44:19,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823761160] [2021-08-30 16:44:19,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-30 16:44:19,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:44:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-30 16:44:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2021-08-30 16:44:19,985 INFO L87 Difference]: Start difference. First operand 4307 states and 4917 transitions. Second operand has 49 states, 48 states have (on average 3.6458333333333335) internal successors, (175), 45 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:44:21,250 INFO L93 Difference]: Finished difference Result 4800 states and 5453 transitions. [2021-08-30 16:44:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-30 16:44:21,251 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.6458333333333335) internal successors, (175), 45 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-08-30 16:44:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:44:21,254 INFO L225 Difference]: With dead ends: 4800 [2021-08-30 16:44:21,254 INFO L226 Difference]: Without dead ends: 4536 [2021-08-30 16:44:21,254 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 3931.20ms TimeCoverageRelationStatistics Valid=293, Invalid=4537, Unknown=0, NotChecked=0, Total=4830 [2021-08-30 16:44:21,255 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 121 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 515.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.54ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1160 IncrementalHoareTripleChecker+Unchecked, 626.73ms IncrementalHoareTripleChecker+Time [2021-08-30 16:44:21,255 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 207 Invalid, 3115 Unknown, 0 Unchecked, 4.54ms Time], IncrementalHoareTripleChecker [14 Valid, 1941 Invalid, 0 Unknown, 1160 Unchecked, 626.73ms Time] [2021-08-30 16:44:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-08-30 16:44:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4088. [2021-08-30 16:44:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4058 states have (on average 1.1436668309512075) internal successors, (4641), 4059 states have internal predecessors, (4641), 27 states have call successors, (27), 27 states have call predecessors, (27), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 4669 transitions. [2021-08-30 16:44:21,288 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 4669 transitions. Word has length 102 [2021-08-30 16:44:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:44:21,289 INFO L470 AbstractCegarLoop]: Abstraction has 4088 states and 4669 transitions. [2021-08-30 16:44:21,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.6458333333333335) internal successors, (175), 45 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:21,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 4669 transitions. [2021-08-30 16:44:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-30 16:44:21,291 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:44:21,291 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 5, 5, 5, 4, 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] [2021-08-30 16:44:21,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-30 16:44:21,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-30 16:44:21,508 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:44:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:44:21,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1588868373, now seen corresponding path program 26 times [2021-08-30 16:44:21,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:44:21,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223411865] [2021-08-30 16:44:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:44:21,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:44:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:21,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:44:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 10 proven. 219 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:44:21,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:44:21,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223411865] [2021-08-30 16:44:21,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223411865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:44:21,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384782043] [2021-08-30 16:44:21,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:44:21,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:44:21,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:44:21,806 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:44:21,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-30 16:44:21,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:44:21,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:44:21,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 121 conjunts are in the unsatisfiable core [2021-08-30 16:44:21,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:44:21,934 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 [2021-08-30 16:44:22,264 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 [2021-08-30 16:44:22,316 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 [2021-08-30 16:44:25,057 INFO L354 Elim1Store]: treesize reduction 71, result has 14.5 percent of original size [2021-08-30 16:44:25,057 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 64 treesize of output 49 [2021-08-30 16:44:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 10 proven. 228 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-30 16:44:25,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:44:36,113 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:44:36,113 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 215 treesize of output 175 [2021-08-30 16:44:36,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:44:36,118 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 171 treesize of output 165 [2021-08-30 16:44:36,228 INFO L354 Elim1Store]: treesize reduction 6, result has 53.8 percent of original size [2021-08-30 16:44:36,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2021-08-30 16:44:36,257 INFO L354 Elim1Store]: treesize reduction 9, result has 76.9 percent of original size [2021-08-30 16:44:36,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 96 [2021-08-30 16:44:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 20 proven. 218 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-30 16:44:36,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384782043] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:44:36,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:44:36,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 32, 32] total 81 [2021-08-30 16:44:36,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109865995] [2021-08-30 16:44:36,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-30 16:44:36,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:44:36,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-30 16:44:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=6140, Unknown=11, NotChecked=0, Total=6480 [2021-08-30 16:44:36,915 INFO L87 Difference]: Start difference. First operand 4088 states and 4669 transitions. Second operand has 81 states, 79 states have (on average 3.0) internal successors, (237), 77 states have internal predecessors, (237), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:44:38,996 INFO L93 Difference]: Finished difference Result 5577 states and 6342 transitions. [2021-08-30 16:44:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-30 16:44:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 3.0) internal successors, (237), 77 states have internal predecessors, (237), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-08-30 16:44:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:44:39,000 INFO L225 Difference]: With dead ends: 5577 [2021-08-30 16:44:39,000 INFO L226 Difference]: Without dead ends: 5086 [2021-08-30 16:44:39,002 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 13704.00ms TimeCoverageRelationStatistics Valid=666, Invalid=13129, Unknown=11, NotChecked=0, Total=13806 [2021-08-30 16:44:39,002 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 146 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 2934 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 662.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.18ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1162 IncrementalHoareTripleChecker+Unchecked, 790.84ms IncrementalHoareTripleChecker+Time [2021-08-30 16:44:39,002 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 269 Invalid, 4121 Unknown, 0 Unchecked, 4.18ms Time], IncrementalHoareTripleChecker [25 Valid, 2934 Invalid, 0 Unknown, 1162 Unchecked, 790.84ms Time] [2021-08-30 16:44:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2021-08-30 16:44:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 4027. [2021-08-30 16:44:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4027 states, 3998 states have (on average 1.1438219109554777) internal successors, (4573), 3999 states have internal predecessors, (4573), 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) [2021-08-30 16:44:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 4600 transitions. [2021-08-30 16:44:39,041 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 4600 transitions. Word has length 102 [2021-08-30 16:44:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:44:39,041 INFO L470 AbstractCegarLoop]: Abstraction has 4027 states and 4600 transitions. [2021-08-30 16:44:39,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 3.0) internal successors, (237), 77 states have internal predecessors, (237), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 4600 transitions. [2021-08-30 16:44:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-30 16:44:39,044 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:44:39,044 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 5, 5, 5, 4, 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] [2021-08-30 16:44:39,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-30 16:44:39,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-30 16:44:39,261 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:44:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:44:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash 135965301, now seen corresponding path program 27 times [2021-08-30 16:44:39,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:44:39,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357046857] [2021-08-30 16:44:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:44:39,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:44:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:39,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:44:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 10 proven. 219 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:44:39,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:44:39,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357046857] [2021-08-30 16:44:39,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357046857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:44:39,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798865459] [2021-08-30 16:44:39,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:44:39,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:44:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:44:39,639 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:44:39,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-30 16:44:39,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-30 16:44:39,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:44:39,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 142 conjunts are in the unsatisfiable core [2021-08-30 16:44:39,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:44:39,806 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 [2021-08-30 16:44:40,255 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 [2021-08-30 16:44:40,297 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 [2021-08-30 16:44:42,127 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:44:42,127 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 52 treesize of output 34 [2021-08-30 16:44:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 10 proven. 233 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:44:42,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:44:43,991 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~length2~0 Int)) (let ((.cse0 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) c_main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse1 (select .cse0 (+ c_main_~nondetString2~0.offset 1)))) (or (not (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse0) c_main_~nondetString1~0.base) (+ c_main_~nondetString1~0.offset 4)) .cse1)) (= .cse1 0))))) is different from false [2021-08-30 16:44:44,004 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:44:44,004 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-08-30 16:44:44,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:44:44,009 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 173 treesize of output 167 [2021-08-30 16:44:44,068 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-08-30 16:44:44,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-08-30 16:44:44,130 INFO L354 Elim1Store]: treesize reduction 13, result has 66.7 percent of original size [2021-08-30 16:44:44,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 88 [2021-08-30 16:44:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 11 proven. 227 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-30 16:44:44,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798865459] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:44:44,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:44:44,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 32, 30] total 79 [2021-08-30 16:44:44,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780982133] [2021-08-30 16:44:44,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-30 16:44:44,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:44:44,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-30 16:44:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=5752, Unknown=1, NotChecked=152, Total=6162 [2021-08-30 16:44:44,549 INFO L87 Difference]: Start difference. First operand 4027 states and 4600 transitions. Second operand has 79 states, 77 states have (on average 3.1298701298701297) internal successors, (241), 75 states have internal predecessors, (241), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:44:48,102 INFO L93 Difference]: Finished difference Result 4763 states and 5403 transitions. [2021-08-30 16:44:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-30 16:44:48,103 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 3.1298701298701297) internal successors, (241), 75 states have internal predecessors, (241), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-08-30 16:44:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:44:48,105 INFO L225 Difference]: With dead ends: 4763 [2021-08-30 16:44:48,106 INFO L226 Difference]: Without dead ends: 4526 [2021-08-30 16:44:48,107 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2972 ImplicationChecksByTransitivity, 5819.37ms TimeCoverageRelationStatistics Valid=578, Invalid=13705, Unknown=1, NotChecked=236, Total=14520 [2021-08-30 16:44:48,107 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 144 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 3097 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 833.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 3766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.38ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 1007.78ms IncrementalHoareTripleChecker+Time [2021-08-30 16:44:48,107 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 170 Invalid, 3766 Unknown, 0 Unchecked, 6.38ms Time], IncrementalHoareTripleChecker [18 Valid, 3097 Invalid, 0 Unknown, 651 Unchecked, 1007.78ms Time] [2021-08-30 16:44:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4526 states. [2021-08-30 16:44:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4526 to 3913. [2021-08-30 16:44:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3884 states have (on average 1.141091658084449) internal successors, (4432), 3885 states have internal predecessors, (4432), 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) [2021-08-30 16:44:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 4459 transitions. [2021-08-30 16:44:48,134 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 4459 transitions. Word has length 102 [2021-08-30 16:44:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:44:48,135 INFO L470 AbstractCegarLoop]: Abstraction has 3913 states and 4459 transitions. [2021-08-30 16:44:48,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 3.1298701298701297) internal successors, (241), 75 states have internal predecessors, (241), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:44:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 4459 transitions. [2021-08-30 16:44:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-30 16:44:48,137 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:44:48,137 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 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] [2021-08-30 16:44:48,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-30 16:44:48,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:44:48,354 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:44:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:44:48,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1974228854, now seen corresponding path program 12 times [2021-08-30 16:44:48,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:44:48,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850954488] [2021-08-30 16:44:48,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:44:48,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:44:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:48,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:44:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:44:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:44:48,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:44:48,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850954488] [2021-08-30 16:44:48,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850954488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:44:48,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614327959] [2021-08-30 16:44:48,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:44:48,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:44:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:44:48,920 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:44:48,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-30 16:44:49,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-30 16:44:49,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:44:49,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 137 conjunts are in the unsatisfiable core [2021-08-30 16:44:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:44:49,087 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:44:49,087 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 [2021-08-30 16:44:49,996 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 30 treesize of output 26 [2021-08-30 16:44:50,090 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-30 16:44:50,090 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 42 treesize of output 41 [2021-08-30 16:44:52,997 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:44:52,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 56 [2021-08-30 16:44:53,377 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:44:53,378 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 60 treesize of output 42 [2021-08-30 16:44:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:44:53,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:44:54,732 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:44:54,732 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 167 [2021-08-30 16:44:54,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:44:54,737 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 163 treesize of output 157 [2021-08-30 16:44:54,765 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-08-30 16:44:54,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 129 [2021-08-30 16:44:54,807 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-08-30 16:44:54,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 93 [2021-08-30 16:44:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:44:56,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614327959] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:44:56,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:44:56,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 35] total 95 [2021-08-30 16:44:56,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101062298] [2021-08-30 16:44:56,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-08-30 16:44:56,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:44:56,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-08-30 16:44:56,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=8451, Unknown=0, NotChecked=0, Total=8930 [2021-08-30 16:44:56,623 INFO L87 Difference]: Start difference. First operand 3913 states and 4459 transitions. Second operand has 95 states, 93 states have (on average 2.956989247311828) internal successors, (275), 91 states have internal predecessors, (275), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:45:05,340 INFO L93 Difference]: Finished difference Result 7222 states and 8200 transitions. [2021-08-30 16:45:05,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-08-30 16:45:05,341 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 93 states have (on average 2.956989247311828) internal successors, (275), 91 states have internal predecessors, (275), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-08-30 16:45:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:45:05,346 INFO L225 Difference]: With dead ends: 7222 [2021-08-30 16:45:05,346 INFO L226 Difference]: Without dead ends: 7162 [2021-08-30 16:45:05,349 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9213 ImplicationChecksByTransitivity, 9364.09ms TimeCoverageRelationStatistics Valid=1651, Invalid=35791, Unknown=0, NotChecked=0, Total=37442 [2021-08-30 16:45:05,349 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 612 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 9741 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2909.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 10930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.69ms SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 9741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1018 IncrementalHoareTripleChecker+Unchecked, 3475.66ms IncrementalHoareTripleChecker+Time [2021-08-30 16:45:05,350 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 205 Invalid, 10930 Unknown, 0 Unchecked, 18.69ms Time], IncrementalHoareTripleChecker [171 Valid, 9741 Invalid, 0 Unknown, 1018 Unchecked, 3475.66ms Time] [2021-08-30 16:45:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7162 states. [2021-08-30 16:45:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7162 to 5073. [2021-08-30 16:45:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 5038 states have (on average 1.1419213973799127) internal successors, (5753), 5039 states have internal predecessors, (5753), 32 states have call successors, (32), 32 states have call predecessors, (32), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 5786 transitions. [2021-08-30 16:45:05,408 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 5786 transitions. Word has length 102 [2021-08-30 16:45:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:45:05,409 INFO L470 AbstractCegarLoop]: Abstraction has 5073 states and 5786 transitions. [2021-08-30 16:45:05,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 93 states have (on average 2.956989247311828) internal successors, (275), 91 states have internal predecessors, (275), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 5786 transitions. [2021-08-30 16:45:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-30 16:45:05,413 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:45:05,413 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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] [2021-08-30 16:45:05,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-30 16:45:05,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:45:05,633 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:45:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:45:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash 145696489, now seen corresponding path program 28 times [2021-08-30 16:45:05,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:45:05,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974126015] [2021-08-30 16:45:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:45:05,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:45:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:05,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:45:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 221 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:45:05,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:45:05,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974126015] [2021-08-30 16:45:05,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974126015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:45:05,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237826997] [2021-08-30 16:45:05,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:45:05,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:45:05,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:45:05,972 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:45:05,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-30 16:45:06,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:45:06,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:45:06,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-30 16:45:06,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:45:06,143 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:45:06,144 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 [2021-08-30 16:45:06,152 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 [2021-08-30 16:45:06,738 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 [2021-08-30 16:45:06,783 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-08-30 16:45:06,783 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 32 treesize of output 31 [2021-08-30 16:45:07,806 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 16:45:07,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2021-08-30 16:45:07,815 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-08-30 16:45:07,815 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 42 treesize of output 28 [2021-08-30 16:45:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 114 proven. 119 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:45:07,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:45:10,343 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 56 treesize of output 52 [2021-08-30 16:45:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 112 proven. 121 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:45:11,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237826997] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:45:11,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:45:11,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 61 [2021-08-30 16:45:11,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803975272] [2021-08-30 16:45:11,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-30 16:45:11,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:45:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-30 16:45:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3404, Unknown=1, NotChecked=0, Total=3660 [2021-08-30 16:45:11,050 INFO L87 Difference]: Start difference. First operand 5073 states and 5786 transitions. Second operand has 61 states, 59 states have (on average 4.067796610169491) internal successors, (240), 57 states have internal predecessors, (240), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:45:12,911 INFO L93 Difference]: Finished difference Result 5501 states and 6232 transitions. [2021-08-30 16:45:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-30 16:45:12,911 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 4.067796610169491) internal successors, (240), 57 states have internal predecessors, (240), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-08-30 16:45:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:45:12,915 INFO L225 Difference]: With dead ends: 5501 [2021-08-30 16:45:12,915 INFO L226 Difference]: Without dead ends: 5324 [2021-08-30 16:45:12,916 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 4555.24ms TimeCoverageRelationStatistics Valid=889, Invalid=9616, Unknown=1, NotChecked=0, Total=10506 [2021-08-30 16:45:12,917 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 217 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 477.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.02ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 575.48ms IncrementalHoareTripleChecker+Time [2021-08-30 16:45:12,917 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 158 Invalid, 2369 Unknown, 0 Unchecked, 4.02ms Time], IncrementalHoareTripleChecker [45 Valid, 1873 Invalid, 0 Unknown, 451 Unchecked, 575.48ms Time] [2021-08-30 16:45:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2021-08-30 16:45:12,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 4985. [2021-08-30 16:45:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4985 states, 4950 states have (on average 1.142020202020202) internal successors, (5653), 4951 states have internal predecessors, (5653), 32 states have call successors, (32), 32 states have call predecessors, (32), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 5686 transitions. [2021-08-30 16:45:12,955 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 5686 transitions. Word has length 104 [2021-08-30 16:45:12,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:45:12,955 INFO L470 AbstractCegarLoop]: Abstraction has 4985 states and 5686 transitions. [2021-08-30 16:45:12,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 4.067796610169491) internal successors, (240), 57 states have internal predecessors, (240), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 5686 transitions. [2021-08-30 16:45:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-30 16:45:12,959 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:45:12,959 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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] [2021-08-30 16:45:12,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-30 16:45:13,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:45:13,177 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:45:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:45:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1870530163, now seen corresponding path program 29 times [2021-08-30 16:45:13,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:45:13,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179686958] [2021-08-30 16:45:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:45:13,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:45:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:13,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:45:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 221 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:45:13,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:45:13,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179686958] [2021-08-30 16:45:13,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179686958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:45:13,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925800593] [2021-08-30 16:45:13,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:45:13,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:45:13,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:45:13,485 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:45:13,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-30 16:45:13,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-30 16:45:13,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:45:13,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 93 conjunts are in the unsatisfiable core [2021-08-30 16:45:13,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:45:13,668 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:45:13,668 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 [2021-08-30 16:45:14,216 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 [2021-08-30 16:45:14,259 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:45:14,260 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 34 treesize of output 33 [2021-08-30 16:45:15,102 INFO L354 Elim1Store]: treesize reduction 47, result has 17.5 percent of original size [2021-08-30 16:45:15,102 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 39 treesize of output 25 [2021-08-30 16:45:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 33 proven. 206 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 16:45:15,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:45:16,290 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 13 [2021-08-30 16:45:16,292 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 26 treesize of output 22 [2021-08-30 16:45:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 45 proven. 194 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 16:45:17,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925800593] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:45:17,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:45:17,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 26] total 75 [2021-08-30 16:45:17,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304540185] [2021-08-30 16:45:17,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-30 16:45:17,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:45:17,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-30 16:45:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=5130, Unknown=0, NotChecked=0, Total=5550 [2021-08-30 16:45:17,091 INFO L87 Difference]: Start difference. First operand 4985 states and 5686 transitions. Second operand has 75 states, 74 states have (on average 3.5945945945945947) internal successors, (266), 71 states have internal predecessors, (266), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:45:25,284 INFO L93 Difference]: Finished difference Result 5843 states and 6581 transitions. [2021-08-30 16:45:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-08-30 16:45:25,284 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.5945945945945947) internal successors, (266), 71 states have internal predecessors, (266), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-08-30 16:45:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:45:25,288 INFO L225 Difference]: With dead ends: 5843 [2021-08-30 16:45:25,288 INFO L226 Difference]: Without dead ends: 4895 [2021-08-30 16:45:25,290 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9371 ImplicationChecksByTransitivity, 8306.06ms TimeCoverageRelationStatistics Valid=2204, Invalid=36016, Unknown=0, NotChecked=0, Total=38220 [2021-08-30 16:45:25,290 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 536 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 4636 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1556.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 5943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.19ms SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 4636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1181 IncrementalHoareTripleChecker+Unchecked, 1844.14ms IncrementalHoareTripleChecker+Time [2021-08-30 16:45:25,290 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 106 Invalid, 5943 Unknown, 0 Unchecked, 11.19ms Time], IncrementalHoareTripleChecker [126 Valid, 4636 Invalid, 0 Unknown, 1181 Unchecked, 1844.14ms Time] [2021-08-30 16:45:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4895 states. [2021-08-30 16:45:25,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4895 to 3690. [2021-08-30 16:45:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3690 states, 3658 states have (on average 1.1350464734827774) internal successors, (4152), 3659 states have internal predecessors, (4152), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3690 states to 3690 states and 4182 transitions. [2021-08-30 16:45:25,362 INFO L78 Accepts]: Start accepts. Automaton has 3690 states and 4182 transitions. Word has length 104 [2021-08-30 16:45:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:45:25,362 INFO L470 AbstractCegarLoop]: Abstraction has 3690 states and 4182 transitions. [2021-08-30 16:45:25,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.5945945945945947) internal successors, (266), 71 states have internal predecessors, (266), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3690 states and 4182 transitions. [2021-08-30 16:45:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-30 16:45:25,365 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:45:25,366 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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] [2021-08-30 16:45:25,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-30 16:45:25,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:45:25,583 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:45:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:45:25,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1310606339, now seen corresponding path program 30 times [2021-08-30 16:45:25,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:45:25,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437239427] [2021-08-30 16:45:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:45:25,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:45:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:25,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:45:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 221 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:45:25,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:45:25,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437239427] [2021-08-30 16:45:25,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437239427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:45:25,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470125868] [2021-08-30 16:45:25,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:45:25,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:45:25,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:45:25,917 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:45:25,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-30 16:45:26,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-30 16:45:26,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:45:26,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 92 conjunts are in the unsatisfiable core [2021-08-30 16:45:26,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:45:26,090 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 [2021-08-30 16:45:26,405 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 [2021-08-30 16:45:26,446 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 [2021-08-30 16:45:27,545 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:45:27,546 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 [2021-08-30 16:45:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 13 proven. 220 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:45:27,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:45:32,658 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 13 [2021-08-30 16:45:32,659 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 26 treesize of output 22 [2021-08-30 16:45:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 221 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:45:33,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470125868] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:45:33,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:45:33,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 22] total 56 [2021-08-30 16:45:33,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452741127] [2021-08-30 16:45:33,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-30 16:45:33,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:45:33,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-30 16:45:33,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2912, Unknown=0, NotChecked=0, Total=3080 [2021-08-30 16:45:33,007 INFO L87 Difference]: Start difference. First operand 3690 states and 4182 transitions. Second operand has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 52 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:34,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:45:34,480 INFO L93 Difference]: Finished difference Result 4044 states and 4568 transitions. [2021-08-30 16:45:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-30 16:45:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 52 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-08-30 16:45:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:45:34,483 INFO L225 Difference]: With dead ends: 4044 [2021-08-30 16:45:34,483 INFO L226 Difference]: Without dead ends: 4005 [2021-08-30 16:45:34,484 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 6712.32ms TimeCoverageRelationStatistics Valid=316, Invalid=5690, Unknown=0, NotChecked=0, Total=6006 [2021-08-30 16:45:34,484 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 127 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 647.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 3790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.77ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1122 IncrementalHoareTripleChecker+Unchecked, 799.25ms IncrementalHoareTripleChecker+Time [2021-08-30 16:45:34,484 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 248 Invalid, 3790 Unknown, 0 Unchecked, 6.77ms Time], IncrementalHoareTripleChecker [16 Valid, 2652 Invalid, 0 Unknown, 1122 Unchecked, 799.25ms Time] [2021-08-30 16:45:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-08-30 16:45:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3690. [2021-08-30 16:45:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3690 states, 3658 states have (on average 1.1347731000546746) internal successors, (4151), 3659 states have internal predecessors, (4151), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3690 states to 3690 states and 4181 transitions. [2021-08-30 16:45:34,514 INFO L78 Accepts]: Start accepts. Automaton has 3690 states and 4181 transitions. Word has length 104 [2021-08-30 16:45:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:45:34,518 INFO L470 AbstractCegarLoop]: Abstraction has 3690 states and 4181 transitions. [2021-08-30 16:45:34,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 52 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3690 states and 4181 transitions. [2021-08-30 16:45:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-30 16:45:34,520 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:45:34,521 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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] [2021-08-30 16:45:34,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-30 16:45:34,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-30 16:45:34,737 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:45:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:45:34,737 INFO L82 PathProgramCache]: Analyzing trace with hash 816072583, now seen corresponding path program 31 times [2021-08-30 16:45:34,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:45:34,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358367096] [2021-08-30 16:45:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:45:34,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:45:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:35,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:45:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 221 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:45:35,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:45:35,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358367096] [2021-08-30 16:45:35,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358367096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:45:35,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411019041] [2021-08-30 16:45:35,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:45:35,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:45:35,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:45:35,129 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:45:35,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-30 16:45:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 140 conjunts are in the unsatisfiable core [2021-08-30 16:45:35,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:45:35,258 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 [2021-08-30 16:45:35,633 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 [2021-08-30 16:45:35,687 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 [2021-08-30 16:45:37,696 INFO L354 Elim1Store]: treesize reduction 75, result has 9.6 percent of original size [2021-08-30 16:45:37,697 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 34 [2021-08-30 16:45:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:45:37,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:45:39,134 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse0 (select .cse1 (+ main_~nondetString2~0.offset 1)))) (or (= .cse0 0) (not (= .cse0 (select (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse1) c_main_~nondetString1~0.base) (+ 5 c_main_~nondetString1~0.offset)))))))) is different from false [2021-08-30 16:45:39,148 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:45:39,149 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 169 [2021-08-30 16:45:39,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:45:39,154 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 165 treesize of output 159 [2021-08-30 16:45:39,233 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-08-30 16:45:39,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-08-30 16:45:39,287 INFO L354 Elim1Store]: treesize reduction 13, result has 66.7 percent of original size [2021-08-30 16:45:39,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 88 [2021-08-30 16:45:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 22 proven. 220 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:45:39,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411019041] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:45:39,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:45:39,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 34, 33] total 86 [2021-08-30 16:45:39,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048550928] [2021-08-30 16:45:39,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-08-30 16:45:39,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:45:39,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-08-30 16:45:39,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=6809, Unknown=1, NotChecked=166, Total=7310 [2021-08-30 16:45:39,686 INFO L87 Difference]: Start difference. First operand 3690 states and 4181 transitions. Second operand has 86 states, 84 states have (on average 3.2261904761904763) internal successors, (271), 82 states have internal predecessors, (271), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:45:42,156 INFO L93 Difference]: Finished difference Result 4121 states and 4670 transitions. [2021-08-30 16:45:42,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-30 16:45:42,157 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 84 states have (on average 3.2261904761904763) internal successors, (271), 82 states have internal predecessors, (271), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-08-30 16:45:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:45:42,161 INFO L225 Difference]: With dead ends: 4121 [2021-08-30 16:45:42,161 INFO L226 Difference]: Without dead ends: 4108 [2021-08-30 16:45:42,162 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 4485.22ms TimeCoverageRelationStatistics Valid=724, Invalid=16049, Unknown=1, NotChecked=256, Total=17030 [2021-08-30 16:45:42,162 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 3153 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 813.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 4558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.80ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1382 IncrementalHoareTripleChecker+Unchecked, 970.34ms IncrementalHoareTripleChecker+Time [2021-08-30 16:45:42,163 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 346 Invalid, 4558 Unknown, 0 Unchecked, 5.80ms Time], IncrementalHoareTripleChecker [23 Valid, 3153 Invalid, 0 Unknown, 1382 Unchecked, 970.34ms Time] [2021-08-30 16:45:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-08-30 16:45:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3698. [2021-08-30 16:45:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3666 states have (on average 1.134478996181124) internal successors, (4159), 3667 states have internal predecessors, (4159), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 4189 transitions. [2021-08-30 16:45:42,244 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 4189 transitions. Word has length 104 [2021-08-30 16:45:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:45:42,244 INFO L470 AbstractCegarLoop]: Abstraction has 3698 states and 4189 transitions. [2021-08-30 16:45:42,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 84 states have (on average 3.2261904761904763) internal successors, (271), 82 states have internal predecessors, (271), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:45:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 4189 transitions. [2021-08-30 16:45:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-30 16:45:42,247 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:45:42,247 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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] [2021-08-30 16:45:42,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-30 16:45:42,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-30 16:45:42,448 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:45:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:45:42,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1558995837, now seen corresponding path program 32 times [2021-08-30 16:45:42,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:45:42,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417638268] [2021-08-30 16:45:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:45:42,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:45:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:42,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:45:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:45:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 220 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-30 16:45:42,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:45:42,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417638268] [2021-08-30 16:45:42,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417638268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:45:42,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17272231] [2021-08-30 16:45:42,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:45:42,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:45:42,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:45:42,774 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:45:42,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-30 16:45:42,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:45:42,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:45:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 131 conjunts are in the unsatisfiable core [2021-08-30 16:45:42,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:45:42,899 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 [2021-08-30 16:45:43,248 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 [2021-08-30 16:45:43,331 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 [2021-08-30 16:45:45,754 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:45:45,754 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 63 treesize of output 45 [2021-08-30 16:45:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 12 proven. 221 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:45:45,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:46:05,613 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:46:05,614 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 213 treesize of output 173 [2021-08-30 16:46:05,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:46:05,620 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 169 treesize of output 163 [2021-08-30 16:46:05,630 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-08-30 16:46:05,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 129 [2021-08-30 16:46:05,679 INFO L354 Elim1Store]: treesize reduction 5, result has 85.7 percent of original size [2021-08-30 16:46:05,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 97 [2021-08-30 16:46:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 17 proven. 215 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-30 16:46:07,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17272231] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:46:07,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:46:07,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 32] total 83 [2021-08-30 16:46:07,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622476146] [2021-08-30 16:46:07,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-30 16:46:07,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:46:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-30 16:46:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=6497, Unknown=11, NotChecked=0, Total=6806 [2021-08-30 16:46:07,331 INFO L87 Difference]: Start difference. First operand 3698 states and 4189 transitions. Second operand has 83 states, 81 states have (on average 2.802469135802469) internal successors, (227), 79 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:46:10,453 INFO L93 Difference]: Finished difference Result 4161 states and 4701 transitions. [2021-08-30 16:46:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-30 16:46:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 81 states have (on average 2.802469135802469) internal successors, (227), 79 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-08-30 16:46:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:46:10,456 INFO L225 Difference]: With dead ends: 4161 [2021-08-30 16:46:10,456 INFO L226 Difference]: Without dead ends: 4161 [2021-08-30 16:46:10,457 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3835 ImplicationChecksByTransitivity, 23902.61ms TimeCoverageRelationStatistics Valid=770, Invalid=17309, Unknown=11, NotChecked=0, Total=18090 [2021-08-30 16:46:10,457 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 198 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 3676 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 922.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 5593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.65ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1889 IncrementalHoareTripleChecker+Unchecked, 1092.09ms IncrementalHoareTripleChecker+Time [2021-08-30 16:46:10,458 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 371 Invalid, 5593 Unknown, 0 Unchecked, 6.65ms Time], IncrementalHoareTripleChecker [28 Valid, 3676 Invalid, 0 Unknown, 1889 Unchecked, 1092.09ms Time] [2021-08-30 16:46:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2021-08-30 16:46:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 3745. [2021-08-30 16:46:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3745 states, 3713 states have (on average 1.1341233503905197) internal successors, (4211), 3714 states have internal predecessors, (4211), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:10,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 4241 transitions. [2021-08-30 16:46:10,482 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 4241 transitions. Word has length 104 [2021-08-30 16:46:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:46:10,482 INFO L470 AbstractCegarLoop]: Abstraction has 3745 states and 4241 transitions. [2021-08-30 16:46:10,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 81 states have (on average 2.802469135802469) internal successors, (227), 79 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 4241 transitions. [2021-08-30 16:46:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-30 16:46:10,485 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:46:10,485 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 7, 7, 7, 7, 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] [2021-08-30 16:46:10,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-30 16:46:10,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:46:10,715 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting cstrspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:46:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:46:10,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1406361924, now seen corresponding path program 9 times [2021-08-30 16:46:10,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:46:10,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989503106] [2021-08-30 16:46:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:46:10,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:46:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:11,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:46:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 29 proven. 302 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 16:46:11,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:46:11,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989503106] [2021-08-30 16:46:11,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989503106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:46:11,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920131003] [2021-08-30 16:46:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:46:11,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:46:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:46:11,068 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:46:11,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-30 16:46:11,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-30 16:46:11,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:46:11,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-30 16:46:11,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:46:11,234 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:46:11,234 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 [2021-08-30 16:46:11,367 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 [2021-08-30 16:46:11,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:46:11,549 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 21 treesize of output 21 [2021-08-30 16:46:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-08-30 16:46:11,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:46:12,434 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 31 treesize of output 29 [2021-08-30 16:46:12,436 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 41 treesize of output 37 [2021-08-30 16:46:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-08-30 16:46:12,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920131003] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:46:12,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:46:12,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11, 11] total 49 [2021-08-30 16:46:12,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103148951] [2021-08-30 16:46:12,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-30 16:46:12,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:46:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-30 16:46:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2220, Unknown=0, NotChecked=0, Total=2352 [2021-08-30 16:46:12,825 INFO L87 Difference]: Start difference. First operand 3745 states and 4241 transitions. Second operand has 49 states, 46 states have (on average 3.717391304347826) internal successors, (171), 45 states have internal predecessors, (171), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:46:16,871 INFO L93 Difference]: Finished difference Result 4988 states and 5577 transitions. [2021-08-30 16:46:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-30 16:46:16,871 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 3.717391304347826) internal successors, (171), 45 states have internal predecessors, (171), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-08-30 16:46:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:46:16,875 INFO L225 Difference]: With dead ends: 4988 [2021-08-30 16:46:16,875 INFO L226 Difference]: Without dead ends: 3925 [2021-08-30 16:46:16,876 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3018 ImplicationChecksByTransitivity, 3256.39ms TimeCoverageRelationStatistics Valid=1123, Invalid=11533, Unknown=0, NotChecked=0, Total=12656 [2021-08-30 16:46:16,876 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 4380 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1255.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 4774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.47ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 1504.78ms IncrementalHoareTripleChecker+Time [2021-08-30 16:46:16,876 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 180 Invalid, 4774 Unknown, 0 Unchecked, 9.47ms Time], IncrementalHoareTripleChecker [50 Valid, 4380 Invalid, 0 Unknown, 344 Unchecked, 1504.78ms Time] [2021-08-30 16:46:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-08-30 16:46:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 2599. [2021-08-30 16:46:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2576 states have (on average 1.1137422360248448) internal successors, (2869), 2576 states have internal predecessors, (2869), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 2891 transitions. [2021-08-30 16:46:16,899 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 2891 transitions. Word has length 106 [2021-08-30 16:46:16,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:46:16,900 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 2891 transitions. [2021-08-30 16:46:16,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 3.717391304347826) internal successors, (171), 45 states have internal predecessors, (171), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 2891 transitions. [2021-08-30 16:46:16,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-30 16:46:16,902 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:46:16,902 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 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] [2021-08-30 16:46:16,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-30 16:46:17,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:46:17,117 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:46:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:46:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1142689433, now seen corresponding path program 13 times [2021-08-30 16:46:17,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:46:17,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139375106] [2021-08-30 16:46:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:46:17,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:46:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:17,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:46:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:46:17,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:46:17,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139375106] [2021-08-30 16:46:17,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139375106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:46:17,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491399323] [2021-08-30 16:46:17,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:46:17,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:46:17,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:46:17,334 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:46:17,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-30 16:46:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-30 16:46:17,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:46:17,460 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:46:17,460 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 [2021-08-30 16:46:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 66 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:46:19,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:46:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 91 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:46:21,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491399323] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:46:21,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:46:21,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 68 [2021-08-30 16:46:21,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101020009] [2021-08-30 16:46:21,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-30 16:46:21,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:46:21,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-30 16:46:21,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=4314, Unknown=0, NotChecked=0, Total=4692 [2021-08-30 16:46:21,071 INFO L87 Difference]: Start difference. First operand 2599 states and 2891 transitions. Second operand has 69 states, 68 states have (on average 4.367647058823529) internal successors, (297), 65 states have internal predecessors, (297), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:46:23,324 INFO L93 Difference]: Finished difference Result 2732 states and 3040 transitions. [2021-08-30 16:46:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-30 16:46:23,325 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 4.367647058823529) internal successors, (297), 65 states have internal predecessors, (297), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-08-30 16:46:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:46:23,327 INFO L225 Difference]: With dead ends: 2732 [2021-08-30 16:46:23,327 INFO L226 Difference]: Without dead ends: 2732 [2021-08-30 16:46:23,329 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 3655.13ms TimeCoverageRelationStatistics Valid=1092, Invalid=13914, Unknown=0, NotChecked=0, Total=15006 [2021-08-30 16:46:23,329 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 86 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 311.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1192 IncrementalHoareTripleChecker+Unchecked, 367.88ms IncrementalHoareTripleChecker+Time [2021-08-30 16:46:23,329 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 136 Invalid, 2185 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [10 Valid, 983 Invalid, 0 Unknown, 1192 Unchecked, 367.88ms Time] [2021-08-30 16:46:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-08-30 16:46:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2725. [2021-08-30 16:46:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2702 states have (on average 1.114359733530718) internal successors, (3011), 2702 states have internal predecessors, (3011), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 3033 transitions. [2021-08-30 16:46:23,364 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 3033 transitions. Word has length 106 [2021-08-30 16:46:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:46:23,365 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 3033 transitions. [2021-08-30 16:46:23,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 4.367647058823529) internal successors, (297), 65 states have internal predecessors, (297), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 3033 transitions. [2021-08-30 16:46:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-08-30 16:46:23,367 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:46:23,367 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 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] [2021-08-30 16:46:23,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-30 16:46:23,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-30 16:46:23,569 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:46:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:46:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1280047824, now seen corresponding path program 33 times [2021-08-30 16:46:23,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:46:23,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171397275] [2021-08-30 16:46:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:46:23,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:46:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:24,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:46:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 10 proven. 268 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-30 16:46:24,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:46:24,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171397275] [2021-08-30 16:46:24,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171397275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:46:24,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206778935] [2021-08-30 16:46:24,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:46:24,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:46:24,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:46:24,137 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:46:24,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-30 16:46:24,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-30 16:46:24,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:46:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-30 16:46:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:46:24,307 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 [2021-08-30 16:46:24,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-30 16:46:24,598 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:46:24,598 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 [2021-08-30 16:46:25,522 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:46:25,522 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 [2021-08-30 16:46:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 11 proven. 258 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-08-30 16:46:25,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:46:34,138 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 13 [2021-08-30 16:46:34,139 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 26 treesize of output 22 [2021-08-30 16:46:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 10 proven. 259 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-08-30 16:46:34,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206778935] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:46:34,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:46:34,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 21, 20] total 67 [2021-08-30 16:46:34,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659020423] [2021-08-30 16:46:34,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-30 16:46:34,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:46:34,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-30 16:46:34,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4224, Unknown=0, NotChecked=0, Total=4422 [2021-08-30 16:46:34,513 INFO L87 Difference]: Start difference. First operand 2725 states and 3033 transitions. Second operand has 67 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 63 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:46:36,418 INFO L93 Difference]: Finished difference Result 2761 states and 3049 transitions. [2021-08-30 16:46:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-30 16:46:36,418 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 63 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-08-30 16:46:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:46:36,420 INFO L225 Difference]: With dead ends: 2761 [2021-08-30 16:46:36,420 INFO L226 Difference]: Without dead ends: 2278 [2021-08-30 16:46:36,421 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 11033.63ms TimeCoverageRelationStatistics Valid=422, Invalid=9084, Unknown=0, NotChecked=0, Total=9506 [2021-08-30 16:46:36,421 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 72 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 450.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 549.12ms IncrementalHoareTripleChecker+Time [2021-08-30 16:46:36,421 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 144 Invalid, 1993 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [20 Valid, 1629 Invalid, 0 Unknown, 344 Unchecked, 549.12ms Time] [2021-08-30 16:46:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-08-30 16:46:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2236. [2021-08-30 16:46:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2218 states have (on average 1.1235347159603246) internal successors, (2492), 2218 states have internal predecessors, (2492), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 2509 transitions. [2021-08-30 16:46:36,438 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 2509 transitions. Word has length 107 [2021-08-30 16:46:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:46:36,439 INFO L470 AbstractCegarLoop]: Abstraction has 2236 states and 2509 transitions. [2021-08-30 16:46:36,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.4393939393939394) internal successors, (227), 63 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 2509 transitions. [2021-08-30 16:46:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-08-30 16:46:36,455 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:46:36,455 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:46:36,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-30 16:46:36,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-30 16:46:36,656 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:46:36,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:46:36,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1822455794, now seen corresponding path program 34 times [2021-08-30 16:46:36,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:46:36,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048315647] [2021-08-30 16:46:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:46:36,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:46:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:37,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:46:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 256 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:46:37,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:46:37,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048315647] [2021-08-30 16:46:37,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048315647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:46:37,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107290230] [2021-08-30 16:46:37,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:46:37,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:46:37,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:46:37,083 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:46:37,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-30 16:46:37,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:46:37,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:46:37,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 126 conjunts are in the unsatisfiable core [2021-08-30 16:46:37,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:46:37,274 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:46:37,274 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 [2021-08-30 16:46:38,029 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 26 treesize of output 22 [2021-08-30 16:46:38,104 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-08-30 16:46:38,104 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 38 treesize of output 37 [2021-08-30 16:46:39,268 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:46:39,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-08-30 16:46:39,699 INFO L354 Elim1Store]: treesize reduction 69, result has 10.4 percent of original size [2021-08-30 16:46:39,700 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 59 treesize of output 42 [2021-08-30 16:46:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 118 proven. 165 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:46:39,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:46:41,626 INFO L354 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2021-08-30 16:46:41,626 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 205 treesize of output 165 [2021-08-30 16:46:41,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:46:41,632 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 161 treesize of output 155 [2021-08-30 16:46:41,658 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-08-30 16:46:41,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 117 [2021-08-30 16:46:41,696 INFO L354 Elim1Store]: treesize reduction 5, result has 85.7 percent of original size [2021-08-30 16:46:41,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 101 [2021-08-30 16:46:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 114 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:46:45,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107290230] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:46:45,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:46:45,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 38, 38] total 95 [2021-08-30 16:46:45,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554035164] [2021-08-30 16:46:45,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-08-30 16:46:45,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:46:45,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-08-30 16:46:45,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=8351, Unknown=0, NotChecked=0, Total=8930 [2021-08-30 16:46:45,067 INFO L87 Difference]: Start difference. First operand 2236 states and 2509 transitions. Second operand has 95 states, 93 states have (on average 2.989247311827957) internal successors, (278), 91 states have internal predecessors, (278), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:46:51,137 INFO L93 Difference]: Finished difference Result 2295 states and 2553 transitions. [2021-08-30 16:46:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-30 16:46:51,138 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 93 states have (on average 2.989247311827957) internal successors, (278), 91 states have internal predecessors, (278), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2021-08-30 16:46:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:46:51,139 INFO L225 Difference]: With dead ends: 2295 [2021-08-30 16:46:51,139 INFO L226 Difference]: Without dead ends: 1937 [2021-08-30 16:46:51,141 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6464 ImplicationChecksByTransitivity, 8837.80ms TimeCoverageRelationStatistics Valid=2263, Invalid=25459, Unknown=0, NotChecked=0, Total=27722 [2021-08-30 16:46:51,141 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 393 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 3671 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1077.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 5164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.76ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1397 IncrementalHoareTripleChecker+Unchecked, 1268.79ms IncrementalHoareTripleChecker+Time [2021-08-30 16:46:51,141 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 156 Invalid, 5164 Unknown, 0 Unchecked, 5.76ms Time], IncrementalHoareTripleChecker [96 Valid, 3671 Invalid, 0 Unknown, 1397 Unchecked, 1268.79ms Time] [2021-08-30 16:46:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-08-30 16:46:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1937. [2021-08-30 16:46:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1920 states have (on average 1.1291666666666667) internal successors, (2168), 1920 states have internal predecessors, (2168), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2184 transitions. [2021-08-30 16:46:51,154 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2184 transitions. Word has length 109 [2021-08-30 16:46:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:46:51,155 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 2184 transitions. [2021-08-30 16:46:51,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 93 states have (on average 2.989247311827957) internal successors, (278), 91 states have internal predecessors, (278), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2184 transitions. [2021-08-30 16:46:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-30 16:46:51,156 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:46:51,156 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:46:51,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-30 16:46:51,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:46:51,373 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:46:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:46:51,373 INFO L82 PathProgramCache]: Analyzing trace with hash 525446964, now seen corresponding path program 35 times [2021-08-30 16:46:51,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:46:51,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846862313] [2021-08-30 16:46:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:46:51,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:46:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:51,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:46:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 265 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:46:51,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:46:51,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846862313] [2021-08-30 16:46:51,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846862313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:46:51,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339706473] [2021-08-30 16:46:51,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:46:51,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:46:51,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:46:51,717 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:46:51,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-30 16:46:51,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-30 16:46:51,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:46:51,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-30 16:46:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:46:51,916 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:46:51,916 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 [2021-08-30 16:46:52,557 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 [2021-08-30 16:46:52,618 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-30 16:46:52,618 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 38 treesize of output 37 [2021-08-30 16:46:53,365 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:46:53,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2021-08-30 16:46:56,197 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:46:56,197 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 44 treesize of output 29 [2021-08-30 16:46:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 15 proven. 270 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:46:56,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:46:56,777 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 23 treesize of output 21 [2021-08-30 16:46:56,779 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 33 treesize of output 29 [2021-08-30 16:46:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 271 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 16:46:57,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339706473] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:46:57,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:46:57,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30, 29] total 72 [2021-08-30 16:46:57,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662777860] [2021-08-30 16:46:57,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-08-30 16:46:57,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:46:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-08-30 16:46:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=4809, Unknown=1, NotChecked=0, Total=5112 [2021-08-30 16:46:57,848 INFO L87 Difference]: Start difference. First operand 1937 states and 2184 transitions. Second operand has 72 states, 71 states have (on average 3.619718309859155) internal successors, (257), 68 states have internal predecessors, (257), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:46:58,634 INFO L93 Difference]: Finished difference Result 2260 states and 2529 transitions. [2021-08-30 16:46:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-30 16:46:58,635 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.619718309859155) internal successors, (257), 68 states have internal predecessors, (257), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-08-30 16:46:58,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:46:58,636 INFO L225 Difference]: With dead ends: 2260 [2021-08-30 16:46:58,636 INFO L226 Difference]: Without dead ends: 2137 [2021-08-30 16:46:58,637 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 4815.44ms TimeCoverageRelationStatistics Valid=544, Invalid=7827, Unknown=1, NotChecked=0, Total=8372 [2021-08-30 16:46:58,637 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 185 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 214.57ms IncrementalHoareTripleChecker+Time [2021-08-30 16:46:58,637 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 124 Invalid, 1448 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [12 Valid, 945 Invalid, 0 Unknown, 491 Unchecked, 214.57ms Time] [2021-08-30 16:46:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-08-30 16:46:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2134. [2021-08-30 16:46:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 2117 states have (on average 1.1265942371280113) internal successors, (2385), 2117 states have internal predecessors, (2385), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 2401 transitions. [2021-08-30 16:46:58,650 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 2401 transitions. Word has length 111 [2021-08-30 16:46:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:46:58,650 INFO L470 AbstractCegarLoop]: Abstraction has 2134 states and 2401 transitions. [2021-08-30 16:46:58,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.619718309859155) internal successors, (257), 68 states have internal predecessors, (257), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:46:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 2401 transitions. [2021-08-30 16:46:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-08-30 16:46:58,652 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:46:58,652 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 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] [2021-08-30 16:46:58,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-30 16:46:58,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-30 16:46:58,870 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:46:58,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:46:58,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1598325902, now seen corresponding path program 14 times [2021-08-30 16:46:58,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:46:58,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793615598] [2021-08-30 16:46:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:46:58,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:46:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:59,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:46:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:46:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:46:59,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:46:59,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793615598] [2021-08-30 16:46:59,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793615598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:46:59,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105888218] [2021-08-30 16:46:59,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:46:59,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:46:59,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:46:59,280 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:46:59,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-30 16:46:59,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:46:59,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:46:59,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 144 conjunts are in the unsatisfiable core [2021-08-30 16:46:59,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:46:59,422 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 [2021-08-30 16:46:59,760 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 [2021-08-30 16:46:59,801 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 [2021-08-30 16:47:01,439 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:47:01,439 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 52 treesize of output 34 [2021-08-30 16:47:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:47:01,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:47:02,474 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~length2~0 Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) c_main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse0 (select .cse1 c_main_~nondetString2~0.offset))) (or (not (= .cse0 (select (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse1) c_main_~nondetString1~0.base) (+ 7 c_main_~nondetString1~0.offset)))) (= .cse0 0))))) is different from false [2021-08-30 16:47:02,487 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:47:02,488 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 199 treesize of output 159 [2021-08-30 16:47:02,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:47:02,499 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 155 treesize of output 149 [2021-08-30 16:47:02,552 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-08-30 16:47:02,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-08-30 16:47:02,601 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-08-30 16:47:02,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-08-30 16:47:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 21 proven. 310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:47:03,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105888218] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:47:03,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:47:03,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 89 [2021-08-30 16:47:03,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532218286] [2021-08-30 16:47:03,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-08-30 16:47:03,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:47:03,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-08-30 16:47:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=7356, Unknown=1, NotChecked=172, Total=7832 [2021-08-30 16:47:03,150 INFO L87 Difference]: Start difference. First operand 2134 states and 2401 transitions. Second operand has 89 states, 87 states have (on average 3.0804597701149423) internal successors, (268), 85 states have internal predecessors, (268), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:47:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:47:06,504 INFO L93 Difference]: Finished difference Result 3574 states and 4029 transitions. [2021-08-30 16:47:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-30 16:47:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 87 states have (on average 3.0804597701149423) internal successors, (268), 85 states have internal predecessors, (268), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-08-30 16:47:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:47:06,527 INFO L225 Difference]: With dead ends: 3574 [2021-08-30 16:47:06,527 INFO L226 Difference]: Without dead ends: 3506 [2021-08-30 16:47:06,529 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4966 ImplicationChecksByTransitivity, 5047.31ms TimeCoverageRelationStatistics Valid=813, Invalid=22446, Unknown=1, NotChecked=302, Total=23562 [2021-08-30 16:47:06,530 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 135 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 3766 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 885.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 5979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.59ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2188 IncrementalHoareTripleChecker+Unchecked, 1069.24ms IncrementalHoareTripleChecker+Time [2021-08-30 16:47:06,530 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 212 Invalid, 5979 Unknown, 0 Unchecked, 8.59ms Time], IncrementalHoareTripleChecker [25 Valid, 3766 Invalid, 0 Unknown, 2188 Unchecked, 1069.24ms Time] [2021-08-30 16:47:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-08-30 16:47:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 3375. [2021-08-30 16:47:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3375 states, 3352 states have (on average 1.1378281622911695) internal successors, (3814), 3352 states have internal predecessors, (3814), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:47:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3375 states to 3375 states and 3836 transitions. [2021-08-30 16:47:06,562 INFO L78 Accepts]: Start accepts. Automaton has 3375 states and 3836 transitions. Word has length 114 [2021-08-30 16:47:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:47:06,562 INFO L470 AbstractCegarLoop]: Abstraction has 3375 states and 3836 transitions. [2021-08-30 16:47:06,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 87 states have (on average 3.0804597701149423) internal successors, (268), 85 states have internal predecessors, (268), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:47:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3375 states and 3836 transitions. [2021-08-30 16:47:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-08-30 16:47:06,573 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:47:06,573 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:47:06,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-30 16:47:06,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:47:06,775 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:47:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:47:06,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1607655471, now seen corresponding path program 36 times [2021-08-30 16:47:06,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:47:06,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091960139] [2021-08-30 16:47:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:47:06,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:47:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:47:07,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:47:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:47:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 14 proven. 300 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:47:07,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:47:07,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091960139] [2021-08-30 16:47:07,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091960139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:47:07,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793402777] [2021-08-30 16:47:07,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:47:07,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:47:07,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:47:07,150 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:47:07,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-30 16:47:07,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-30 16:47:07,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:47:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-30 16:47:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:47:07,330 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 [2021-08-30 16:47:07,675 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 [2021-08-30 16:47:07,721 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:47:07,721 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 [2021-08-30 16:47:08,948 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:47:08,948 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 [2021-08-30 16:47:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 15 proven. 299 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:47:09,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:47:14,250 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 13 [2021-08-30 16:47:14,252 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 26 treesize of output 22 [2021-08-30 16:47:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 14 proven. 300 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:47:14,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793402777] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:47:14,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:47:14,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 59 [2021-08-30 16:47:14,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826533097] [2021-08-30 16:47:14,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-30 16:47:14,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:47:14,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-30 16:47:14,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3249, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:47:14,613 INFO L87 Difference]: Start difference. First operand 3375 states and 3836 transitions. Second operand has 59 states, 58 states have (on average 3.913793103448276) internal successors, (227), 55 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:47:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:47:15,923 INFO L93 Difference]: Finished difference Result 3857 states and 4355 transitions. [2021-08-30 16:47:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-30 16:47:15,923 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.913793103448276) internal successors, (227), 55 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-08-30 16:47:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:47:15,926 INFO L225 Difference]: With dead ends: 3857 [2021-08-30 16:47:15,926 INFO L226 Difference]: Without dead ends: 3297 [2021-08-30 16:47:15,926 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 200 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 7126.80ms TimeCoverageRelationStatistics Valid=343, Invalid=6629, Unknown=0, NotChecked=0, Total=6972 [2021-08-30 16:47:15,927 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 75 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 422.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 3075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1236 IncrementalHoareTripleChecker+Unchecked, 513.81ms IncrementalHoareTripleChecker+Time [2021-08-30 16:47:15,927 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 151 Invalid, 3075 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [15 Valid, 1824 Invalid, 0 Unknown, 1236 Unchecked, 513.81ms Time] [2021-08-30 16:47:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2021-08-30 16:47:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 3231. [2021-08-30 16:47:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3208 states have (on average 1.1384039900249376) internal successors, (3652), 3208 states have internal predecessors, (3652), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:47:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 3674 transitions. [2021-08-30 16:47:15,948 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 3674 transitions. Word has length 116 [2021-08-30 16:47:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:47:15,948 INFO L470 AbstractCegarLoop]: Abstraction has 3231 states and 3674 transitions. [2021-08-30 16:47:15,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.913793103448276) internal successors, (227), 55 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:47:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 3674 transitions. [2021-08-30 16:47:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-08-30 16:47:15,951 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:47:15,952 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:47:15,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-30 16:47:16,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:47:16,169 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:47:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:47:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash -937279377, now seen corresponding path program 37 times [2021-08-30 16:47:16,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:47:16,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144825006] [2021-08-30 16:47:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:47:16,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:47:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:47:16,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:47:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:47:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 14 proven. 300 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:47:16,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:47:16,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144825006] [2021-08-30 16:47:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144825006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:47:16,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410784275] [2021-08-30 16:47:16,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:47:16,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:47:16,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:47:16,662 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:47:16,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-30 16:47:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:47:16,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 97 conjunts are in the unsatisfiable core [2021-08-30 16:47:16,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:47:16,796 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:47:16,796 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 [2021-08-30 16:47:17,312 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 [2021-08-30 16:47:17,368 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-30 16:47:17,368 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 38 treesize of output 37 [2021-08-30 16:47:18,637 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:47:18,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2021-08-30 16:47:18,952 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:47:18,952 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 44 treesize of output 29 [2021-08-30 16:47:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 15 proven. 305 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 16:47:19,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:47:19,798 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 26 treesize of output 24 [2021-08-30 16:47:19,799 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 36 treesize of output 32 [2021-08-30 16:47:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 14 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 16:47:20,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410784275] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:47:20,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:47:20,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 31, 30] total 76 [2021-08-30 16:47:20,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467908813] [2021-08-30 16:47:20,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-30 16:47:20,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:47:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-30 16:47:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=5379, Unknown=0, NotChecked=0, Total=5700 [2021-08-30 16:47:20,875 INFO L87 Difference]: Start difference. First operand 3231 states and 3674 transitions. Second operand has 76 states, 75 states have (on average 3.68) internal successors, (276), 72 states have internal predecessors, (276), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:47:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:47:22,067 INFO L93 Difference]: Finished difference Result 3541 states and 4006 transitions. [2021-08-30 16:47:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-30 16:47:22,068 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 3.68) internal successors, (276), 72 states have internal predecessors, (276), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-08-30 16:47:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:47:22,070 INFO L225 Difference]: With dead ends: 3541 [2021-08-30 16:47:22,070 INFO L226 Difference]: Without dead ends: 3426 [2021-08-30 16:47:22,071 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 3345.40ms TimeCoverageRelationStatistics Valid=560, Invalid=8370, Unknown=0, NotChecked=0, Total=8930 [2021-08-30 16:47:22,071 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 112 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 333.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.57ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 404.49ms IncrementalHoareTripleChecker+Time [2021-08-30 16:47:22,071 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 132 Invalid, 1579 Unknown, 0 Unchecked, 2.57ms Time], IncrementalHoareTripleChecker [12 Valid, 1157 Invalid, 0 Unknown, 410 Unchecked, 404.49ms Time] [2021-08-30 16:47:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-08-30 16:47:22,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3426. [2021-08-30 16:47:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3403 states have (on average 1.1366441375257126) internal successors, (3868), 3403 states have internal predecessors, (3868), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:47:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 3890 transitions. [2021-08-30 16:47:22,094 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 3890 transitions. Word has length 116 [2021-08-30 16:47:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:47:22,094 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 3890 transitions. [2021-08-30 16:47:22,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 3.68) internal successors, (276), 72 states have internal predecessors, (276), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:47:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 3890 transitions. [2021-08-30 16:47:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-08-30 16:47:22,096 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:47:22,097 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:47:22,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-30 16:47:22,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-30 16:47:22,318 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:47:22,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:47:22,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2047713785, now seen corresponding path program 38 times [2021-08-30 16:47:22,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:47:22,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284242277] [2021-08-30 16:47:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:47:22,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:47:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:47:22,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:47:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:47:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 14 proven. 300 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:47:22,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:47:22,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284242277] [2021-08-30 16:47:22,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284242277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:47:22,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424692789] [2021-08-30 16:47:22,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:47:22,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:47:22,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:47:22,792 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:47:22,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-30 16:47:22,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:47:22,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:47:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 149 conjunts are in the unsatisfiable core [2021-08-30 16:47:22,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:47:22,983 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 [2021-08-30 16:47:23,457 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 [2021-08-30 16:47:23,508 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 [2021-08-30 16:47:26,846 INFO L354 Elim1Store]: treesize reduction 75, result has 9.6 percent of original size [2021-08-30 16:47:26,846 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 64 treesize of output 45 [2021-08-30 16:47:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 14 proven. 314 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:47:26,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:47:57,354 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:47:57,354 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 223 treesize of output 183 [2021-08-30 16:47:57,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:47:57,360 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 179 treesize of output 173 [2021-08-30 16:47:57,452 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 66 treesize of output 58 [2021-08-30 16:47:57,489 INFO L354 Elim1Store]: treesize reduction 9, result has 76.9 percent of original size [2021-08-30 16:47:57,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 95 [2021-08-30 16:47:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 299 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:47:58,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424692789] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:47:58,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:47:58,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 37, 36] total 94 [2021-08-30 16:47:58,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867580651] [2021-08-30 16:47:58,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-08-30 16:47:58,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:47:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-08-30 16:47:58,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=8367, Unknown=12, NotChecked=0, Total=8742 [2021-08-30 16:47:58,380 INFO L87 Difference]: Start difference. First operand 3426 states and 3890 transitions. Second operand has 94 states, 92 states have (on average 3.3369565217391304) internal successors, (307), 90 states have internal predecessors, (307), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:01,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:48:01,670 INFO L93 Difference]: Finished difference Result 4096 states and 4619 transitions. [2021-08-30 16:48:01,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-30 16:48:01,670 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 3.3369565217391304) internal successors, (307), 90 states have internal predecessors, (307), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-08-30 16:48:01,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:48:01,673 INFO L225 Difference]: With dead ends: 4096 [2021-08-30 16:48:01,673 INFO L226 Difference]: Without dead ends: 3905 [2021-08-30 16:48:01,675 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3465 ImplicationChecksByTransitivity, 35283.18ms TimeCoverageRelationStatistics Valid=619, Invalid=14620, Unknown=13, NotChecked=0, Total=15252 [2021-08-30 16:48:01,675 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 428.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.93ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 565.76ms IncrementalHoareTripleChecker+Time [2021-08-30 16:48:01,675 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 193 Invalid, 2166 Unknown, 0 Unchecked, 2.93ms Time], IncrementalHoareTripleChecker [14 Valid, 1634 Invalid, 0 Unknown, 518 Unchecked, 565.76ms Time] [2021-08-30 16:48:01,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2021-08-30 16:48:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3541. [2021-08-30 16:48:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3518 states have (on average 1.1367254121660033) internal successors, (3999), 3518 states have internal predecessors, (3999), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 4021 transitions. [2021-08-30 16:48:01,700 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 4021 transitions. Word has length 116 [2021-08-30 16:48:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:48:01,700 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 4021 transitions. [2021-08-30 16:48:01,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 3.3369565217391304) internal successors, (307), 90 states have internal predecessors, (307), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 4021 transitions. [2021-08-30 16:48:01,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-08-30 16:48:01,703 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:48:01,703 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:48:01,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-30 16:48:01,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:01,917 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:48:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:48:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash -336864893, now seen corresponding path program 39 times [2021-08-30 16:48:01,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:48:01,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652881513] [2021-08-30 16:48:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:48:01,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:48:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:02,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:48:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 14 proven. 300 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:48:02,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:48:02,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652881513] [2021-08-30 16:48:02,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652881513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:48:02,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796370381] [2021-08-30 16:48:02,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:48:02,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:02,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:48:02,349 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:48:02,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-30 16:48:02,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-30 16:48:02,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:48:02,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-30 16:48:02,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:48:02,518 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 [2021-08-30 16:48:02,883 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 [2021-08-30 16:48:02,932 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:48:02,933 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 [2021-08-30 16:48:04,204 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:48:04,204 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 [2021-08-30 16:48:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 15 proven. 299 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:48:04,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:48:10,669 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 13 [2021-08-30 16:48:10,671 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 26 treesize of output 22 [2021-08-30 16:48:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 14 proven. 300 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:48:11,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796370381] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:48:11,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:48:11,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 59 [2021-08-30 16:48:11,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008864282] [2021-08-30 16:48:11,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-30 16:48:11,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:48:11,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-30 16:48:11,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3249, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:48:11,101 INFO L87 Difference]: Start difference. First operand 3541 states and 4021 transitions. Second operand has 59 states, 58 states have (on average 3.913793103448276) internal successors, (227), 55 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:48:12,152 INFO L93 Difference]: Finished difference Result 4076 states and 4603 transitions. [2021-08-30 16:48:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-30 16:48:12,153 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.913793103448276) internal successors, (227), 55 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-08-30 16:48:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:48:12,155 INFO L225 Difference]: With dead ends: 4076 [2021-08-30 16:48:12,155 INFO L226 Difference]: Without dead ends: 3961 [2021-08-30 16:48:12,156 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 200 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 8107.70ms TimeCoverageRelationStatistics Valid=282, Invalid=5120, Unknown=0, NotChecked=0, Total=5402 [2021-08-30 16:48:12,156 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 70 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 441.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.86ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 881 IncrementalHoareTripleChecker+Unchecked, 538.91ms IncrementalHoareTripleChecker+Time [2021-08-30 16:48:12,156 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 147 Invalid, 2512 Unknown, 0 Unchecked, 3.86ms Time], IncrementalHoareTripleChecker [18 Valid, 1613 Invalid, 0 Unknown, 881 Unchecked, 538.91ms Time] [2021-08-30 16:48:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2021-08-30 16:48:12,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 3736. [2021-08-30 16:48:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3736 states, 3713 states have (on average 1.1365472663614329) internal successors, (4220), 3713 states have internal predecessors, (4220), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3736 states to 3736 states and 4242 transitions. [2021-08-30 16:48:12,207 INFO L78 Accepts]: Start accepts. Automaton has 3736 states and 4242 transitions. Word has length 116 [2021-08-30 16:48:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:48:12,208 INFO L470 AbstractCegarLoop]: Abstraction has 3736 states and 4242 transitions. [2021-08-30 16:48:12,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.913793103448276) internal successors, (227), 55 states have internal predecessors, (227), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3736 states and 4242 transitions. [2021-08-30 16:48:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-30 16:48:12,210 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:48:12,210 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 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] [2021-08-30 16:48:12,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-30 16:48:12,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:12,429 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:48:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:48:12,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1153670961, now seen corresponding path program 15 times [2021-08-30 16:48:12,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:48:12,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080892153] [2021-08-30 16:48:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:48:12,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:48:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:12,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:48:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 66 proven. 294 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:48:12,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:48:12,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080892153] [2021-08-30 16:48:12,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080892153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:48:12,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805223970] [2021-08-30 16:48:12,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:48:12,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:12,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:48:12,711 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:48:12,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-30 16:48:12,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-30 16:48:12,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:48:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 76 conjunts are in the unsatisfiable core [2021-08-30 16:48:12,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:48:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 91 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:48:13,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:48:14,054 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 7 treesize of output 5 [2021-08-30 16:48:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 91 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:48:14,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805223970] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:48:14,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:48:14,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 59 [2021-08-30 16:48:14,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150501580] [2021-08-30 16:48:14,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-30 16:48:14,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:48:14,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-30 16:48:14,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=3115, Unknown=0, NotChecked=0, Total=3540 [2021-08-30 16:48:14,109 INFO L87 Difference]: Start difference. First operand 3736 states and 4242 transitions. Second operand has 60 states, 59 states have (on average 4.966101694915254) internal successors, (293), 56 states have internal predecessors, (293), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:48:15,265 INFO L93 Difference]: Finished difference Result 4725 states and 5367 transitions. [2021-08-30 16:48:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-30 16:48:15,266 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.966101694915254) internal successors, (293), 56 states have internal predecessors, (293), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-08-30 16:48:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:48:15,269 INFO L225 Difference]: With dead ends: 4725 [2021-08-30 16:48:15,269 INFO L226 Difference]: Without dead ends: 4725 [2021-08-30 16:48:15,269 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 1278.37ms TimeCoverageRelationStatistics Valid=860, Invalid=5946, Unknown=0, NotChecked=0, Total=6806 [2021-08-30 16:48:15,270 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 278 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 3376 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 619.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.79ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 731.37ms IncrementalHoareTripleChecker+Time [2021-08-30 16:48:15,270 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 124 Invalid, 3419 Unknown, 0 Unchecked, 3.79ms Time], IncrementalHoareTripleChecker [43 Valid, 3376 Invalid, 0 Unknown, 0 Unchecked, 731.37ms Time] [2021-08-30 16:48:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4725 states. [2021-08-30 16:48:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4725 to 3862. [2021-08-30 16:48:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3862 states, 3839 states have (on average 1.1362333941130502) internal successors, (4362), 3839 states have internal predecessors, (4362), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3862 states to 3862 states and 4384 transitions. [2021-08-30 16:48:15,297 INFO L78 Accepts]: Start accepts. Automaton has 3862 states and 4384 transitions. Word has length 118 [2021-08-30 16:48:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:48:15,298 INFO L470 AbstractCegarLoop]: Abstraction has 3862 states and 4384 transitions. [2021-08-30 16:48:15,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.966101694915254) internal successors, (293), 56 states have internal predecessors, (293), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3862 states and 4384 transitions. [2021-08-30 16:48:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-30 16:48:15,300 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:48:15,300 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:48:15,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-30 16:48:15,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:15,517 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:48:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:48:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash -860021898, now seen corresponding path program 40 times [2021-08-30 16:48:15,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:48:15,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956958176] [2021-08-30 16:48:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:48:15,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:48:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:15,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:48:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 14 proven. 340 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:48:15,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:48:15,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956958176] [2021-08-30 16:48:15,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956958176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:48:15,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802093332] [2021-08-30 16:48:15,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:48:15,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:15,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:48:15,771 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:48:15,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-30 16:48:15,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:48:15,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:48:15,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 108 conjunts are in the unsatisfiable core [2021-08-30 16:48:15,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:48:15,913 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:48:15,913 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 [2021-08-30 16:48:16,449 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 [2021-08-30 16:48:16,490 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:48:16,491 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 34 treesize of output 33 [2021-08-30 16:48:17,705 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:48:17,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2021-08-30 16:48:18,260 INFO L354 Elim1Store]: treesize reduction 77, result has 9.4 percent of original size [2021-08-30 16:48:18,260 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 54 treesize of output 37 [2021-08-30 16:48:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 16 proven. 345 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-30 16:48:18,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:48:19,207 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 31 treesize of output 27 [2021-08-30 16:48:19,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:48:19,209 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 51 treesize of output 43 [2021-08-30 16:48:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 35 proven. 326 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-30 16:48:20,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802093332] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:48:20,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:48:20,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 34, 33] total 82 [2021-08-30 16:48:20,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648399159] [2021-08-30 16:48:20,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-08-30 16:48:20,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:48:20,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-08-30 16:48:20,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=6247, Unknown=0, NotChecked=0, Total=6642 [2021-08-30 16:48:20,658 INFO L87 Difference]: Start difference. First operand 3862 states and 4384 transitions. Second operand has 82 states, 81 states have (on average 3.54320987654321) internal successors, (287), 78 states have internal predecessors, (287), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:26,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:48:26,171 INFO L93 Difference]: Finished difference Result 4100 states and 4621 transitions. [2021-08-30 16:48:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-30 16:48:26,172 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.54320987654321) internal successors, (287), 78 states have internal predecessors, (287), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-08-30 16:48:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:48:26,173 INFO L225 Difference]: With dead ends: 4100 [2021-08-30 16:48:26,173 INFO L226 Difference]: Without dead ends: 2736 [2021-08-30 16:48:26,174 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 6239.08ms TimeCoverageRelationStatistics Valid=1242, Invalid=20514, Unknown=0, NotChecked=0, Total=21756 [2021-08-30 16:48:26,175 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 395 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 5517 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1638.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 8333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.83ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 5517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2738 IncrementalHoareTripleChecker+Unchecked, 1947.99ms IncrementalHoareTripleChecker+Time [2021-08-30 16:48:26,175 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 153 Invalid, 8333 Unknown, 0 Unchecked, 11.83ms Time], IncrementalHoareTripleChecker [78 Valid, 5517 Invalid, 0 Unknown, 2738 Unchecked, 1947.99ms Time] [2021-08-30 16:48:26,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-08-30 16:48:26,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2688. [2021-08-30 16:48:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2670 states have (on average 1.1374531835205992) internal successors, (3037), 2670 states have internal predecessors, (3037), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 3054 transitions. [2021-08-30 16:48:26,202 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 3054 transitions. Word has length 121 [2021-08-30 16:48:26,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:48:26,202 INFO L470 AbstractCegarLoop]: Abstraction has 2688 states and 3054 transitions. [2021-08-30 16:48:26,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.54320987654321) internal successors, (287), 78 states have internal predecessors, (287), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 3054 transitions. [2021-08-30 16:48:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-30 16:48:26,204 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:48:26,204 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:48:26,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-30 16:48:26,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-30 16:48:26,422 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:48:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:48:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash 121839660, now seen corresponding path program 41 times [2021-08-30 16:48:26,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:48:26,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979111923] [2021-08-30 16:48:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:48:26,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:48:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:26,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:48:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 14 proven. 340 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:48:26,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:48:26,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979111923] [2021-08-30 16:48:26,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979111923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:48:26,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540723151] [2021-08-30 16:48:26,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:48:26,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:26,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:48:26,820 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:48:26,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-30 16:48:26,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-30 16:48:26,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:48:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 154 conjunts are in the unsatisfiable core [2021-08-30 16:48:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:48:27,004 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:48:27,004 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 [2021-08-30 16:48:27,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:48:27,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2021-08-30 16:48:27,842 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 [2021-08-30 16:48:27,905 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 34 treesize of output 33 [2021-08-30 16:48:30,408 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:48:30,408 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 58 treesize of output 40 [2021-08-30 16:48:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 14 proven. 355 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:48:30,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:48:31,808 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:48:31,809 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-08-30 16:48:31,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:48:31,815 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 173 treesize of output 167 [2021-08-30 16:48:31,842 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-08-30 16:48:31,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 137 [2021-08-30 16:48:31,886 INFO L354 Elim1Store]: treesize reduction 13, result has 66.7 percent of original size [2021-08-30 16:48:31,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 101 [2021-08-30 16:48:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 15 proven. 354 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:48:34,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540723151] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:48:34,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:48:34,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 40, 39] total 100 [2021-08-30 16:48:34,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663109978] [2021-08-30 16:48:34,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-08-30 16:48:34,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:48:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-08-30 16:48:34,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=9491, Unknown=0, NotChecked=0, Total=9900 [2021-08-30 16:48:34,107 INFO L87 Difference]: Start difference. First operand 2688 states and 3054 transitions. Second operand has 100 states, 98 states have (on average 3.204081632653061) internal successors, (314), 96 states have internal predecessors, (314), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:37,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:48:37,934 INFO L93 Difference]: Finished difference Result 2806 states and 3174 transitions. [2021-08-30 16:48:37,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-30 16:48:37,935 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 98 states have (on average 3.204081632653061) internal successors, (314), 96 states have internal predecessors, (314), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-08-30 16:48:37,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:48:37,937 INFO L225 Difference]: With dead ends: 2806 [2021-08-30 16:48:37,937 INFO L226 Difference]: Without dead ends: 2757 [2021-08-30 16:48:37,938 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5264 ImplicationChecksByTransitivity, 7098.98ms TimeCoverageRelationStatistics Valid=934, Invalid=23558, Unknown=0, NotChecked=0, Total=24492 [2021-08-30 16:48:37,939 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 117 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 775.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 4384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.72ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1804 IncrementalHoareTripleChecker+Unchecked, 929.64ms IncrementalHoareTripleChecker+Time [2021-08-30 16:48:37,939 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 258 Invalid, 4384 Unknown, 0 Unchecked, 6.72ms Time], IncrementalHoareTripleChecker [25 Valid, 2555 Invalid, 0 Unknown, 1804 Unchecked, 929.64ms Time] [2021-08-30 16:48:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2021-08-30 16:48:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2693. [2021-08-30 16:48:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2675 states have (on average 1.1368224299065421) internal successors, (3041), 2675 states have internal predecessors, (3041), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 3058 transitions. [2021-08-30 16:48:37,966 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 3058 transitions. Word has length 121 [2021-08-30 16:48:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:48:37,966 INFO L470 AbstractCegarLoop]: Abstraction has 2693 states and 3058 transitions. [2021-08-30 16:48:37,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 98 states have (on average 3.204081632653061) internal successors, (314), 96 states have internal predecessors, (314), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 3058 transitions. [2021-08-30 16:48:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-30 16:48:37,969 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:48:37,969 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:48:37,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-30 16:48:38,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:38,187 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:48:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:48:38,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1846673334, now seen corresponding path program 42 times [2021-08-30 16:48:38,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:48:38,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566485852] [2021-08-30 16:48:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:48:38,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:48:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:38,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:48:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 14 proven. 340 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:48:38,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:48:38,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566485852] [2021-08-30 16:48:38,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566485852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:48:38,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828079057] [2021-08-30 16:48:38,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:48:38,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:38,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:48:38,488 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:48:38,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-30 16:48:38,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-30 16:48:38,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:48:38,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-30 16:48:38,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:48:38,737 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 [2021-08-30 16:48:39,071 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 [2021-08-30 16:48:39,117 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:48:39,117 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 [2021-08-30 16:48:40,100 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:48:40,101 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 [2021-08-30 16:48:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 15 proven. 339 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:48:40,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:48:40,890 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)) c_main_~nondetString1~0.base) (+ 6 c_main_~nondetString1~0.offset)) 0)) is different from false [2021-08-30 16:48:40,892 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 56 treesize of output 50 [2021-08-30 16:48:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 14 proven. 340 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:48:41,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828079057] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:48:41,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:48:41,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2021-08-30 16:48:41,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137445634] [2021-08-30 16:48:41,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-30 16:48:41,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:48:41,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-30 16:48:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3250, Unknown=1, NotChecked=114, Total=3540 [2021-08-30 16:48:41,242 INFO L87 Difference]: Start difference. First operand 2693 states and 3058 transitions. Second operand has 60 states, 58 states have (on average 3.9482758620689653) internal successors, (229), 56 states have internal predecessors, (229), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:48:43,082 INFO L93 Difference]: Finished difference Result 2796 states and 3163 transitions. [2021-08-30 16:48:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-30 16:48:43,082 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 3.9482758620689653) internal successors, (229), 56 states have internal predecessors, (229), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-08-30 16:48:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:48:43,084 INFO L225 Difference]: With dead ends: 2796 [2021-08-30 16:48:43,084 INFO L226 Difference]: Without dead ends: 2783 [2021-08-30 16:48:43,085 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 3115.15ms TimeCoverageRelationStatistics Valid=345, Invalid=6629, Unknown=2, NotChecked=164, Total=7140 [2021-08-30 16:48:43,085 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 76 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 367.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.37ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2092 IncrementalHoareTripleChecker+Unchecked, 446.39ms IncrementalHoareTripleChecker+Time [2021-08-30 16:48:43,085 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 155 Invalid, 3632 Unknown, 0 Unchecked, 3.37ms Time], IncrementalHoareTripleChecker [17 Valid, 1523 Invalid, 0 Unknown, 2092 Unchecked, 446.39ms Time] [2021-08-30 16:48:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-08-30 16:48:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2714. [2021-08-30 16:48:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2696 states have (on average 1.136127596439169) internal successors, (3063), 2696 states have internal predecessors, (3063), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3080 transitions. [2021-08-30 16:48:43,124 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3080 transitions. Word has length 121 [2021-08-30 16:48:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:48:43,124 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 3080 transitions. [2021-08-30 16:48:43,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 3.9482758620689653) internal successors, (229), 56 states have internal predecessors, (229), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:48:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3080 transitions. [2021-08-30 16:48:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-30 16:48:43,126 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:48:43,126 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:48:43,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-30 16:48:43,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:43,341 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:48:43,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:48:43,342 INFO L82 PathProgramCache]: Analyzing trace with hash -701755678, now seen corresponding path program 43 times [2021-08-30 16:48:43,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:48:43,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099432763] [2021-08-30 16:48:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:48:43,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:48:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:43,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:48:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 14 proven. 340 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:48:43,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:48:43,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099432763] [2021-08-30 16:48:43,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099432763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:48:43,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180311326] [2021-08-30 16:48:43,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:48:43,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:48:43,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:48:43,669 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:48:43,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-30 16:48:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:48:43,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 99 conjunts are in the unsatisfiable core [2021-08-30 16:48:43,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:48:43,813 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:48:43,813 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 [2021-08-30 16:48:44,261 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 30 treesize of output 26 [2021-08-30 16:48:44,314 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-30 16:48:44,314 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 47 treesize of output 46 [2021-08-30 16:48:49,526 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:48:49,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2021-08-30 16:48:49,890 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:48:49,891 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 47 treesize of output 32 [2021-08-30 16:48:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 15 proven. 344 refuted. 1 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-30 16:48:49,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:48:50,646 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 26 treesize of output 24 [2021-08-30 16:48:50,647 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 36 treesize of output 32 [2021-08-30 16:48:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 14 proven. 346 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-30 16:48:51,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180311326] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:48:51,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:48:51,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 31, 30] total 76 [2021-08-30 16:48:51,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474519699] [2021-08-30 16:48:51,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-30 16:48:51,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:48:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-30 16:48:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=5339, Unknown=2, NotChecked=0, Total=5700 [2021-08-30 16:48:51,645 INFO L87 Difference]: Start difference. First operand 2714 states and 3080 transitions. Second operand has 76 states, 75 states have (on average 3.7066666666666666) internal successors, (278), 72 states have internal predecessors, (278), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:49:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:49:01,462 INFO L93 Difference]: Finished difference Result 2840 states and 3209 transitions. [2021-08-30 16:49:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-30 16:49:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 3.7066666666666666) internal successors, (278), 72 states have internal predecessors, (278), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-08-30 16:49:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:49:01,464 INFO L225 Difference]: With dead ends: 2840 [2021-08-30 16:49:01,464 INFO L226 Difference]: Without dead ends: 2746 [2021-08-30 16:49:01,465 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 12499.85ms TimeCoverageRelationStatistics Valid=797, Invalid=11190, Unknown=3, NotChecked=0, Total=11990 [2021-08-30 16:49:01,465 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 225 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 610.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 3619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.94ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1545 IncrementalHoareTripleChecker+Unchecked, 736.19ms IncrementalHoareTripleChecker+Time [2021-08-30 16:49:01,465 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 160 Invalid, 3619 Unknown, 0 Unchecked, 6.94ms Time], IncrementalHoareTripleChecker [45 Valid, 2029 Invalid, 0 Unknown, 1545 Unchecked, 736.19ms Time] [2021-08-30 16:49:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-08-30 16:49:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2698. [2021-08-30 16:49:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2698 states, 2680 states have (on average 1.135820895522388) internal successors, (3044), 2680 states have internal predecessors, (3044), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:49:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2698 states to 2698 states and 3061 transitions. [2021-08-30 16:49:01,482 INFO L78 Accepts]: Start accepts. Automaton has 2698 states and 3061 transitions. Word has length 121 [2021-08-30 16:49:01,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:49:01,482 INFO L470 AbstractCegarLoop]: Abstraction has 2698 states and 3061 transitions. [2021-08-30 16:49:01,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 3.7066666666666666) internal successors, (278), 72 states have internal predecessors, (278), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:49:01,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2698 states and 3061 transitions. [2021-08-30 16:49:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-30 16:49:01,484 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:49:01,484 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:49:01,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-30 16:49:01,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-30 16:49:01,702 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:49:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:49:01,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1341353718, now seen corresponding path program 44 times [2021-08-30 16:49:01,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:49:01,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385780479] [2021-08-30 16:49:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:49:01,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:49:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:49:02,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:49:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:49:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 14 proven. 340 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-30 16:49:02,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:49:02,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385780479] [2021-08-30 16:49:02,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385780479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:49:02,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729886410] [2021-08-30 16:49:02,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:49:02,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:49:02,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:49:02,080 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:49:02,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-30 16:49:02,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:49:02,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:49:02,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 149 conjunts are in the unsatisfiable core [2021-08-30 16:49:02,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:49:02,223 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 [2021-08-30 16:49:02,631 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 [2021-08-30 16:49:02,673 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 [2021-08-30 16:49:05,769 INFO L354 Elim1Store]: treesize reduction 75, result has 9.6 percent of original size [2021-08-30 16:49:05,769 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 64 treesize of output 45 [2021-08-30 16:49:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 14 proven. 354 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:49:05,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:49:33,832 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:49:33,832 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 215 treesize of output 175 [2021-08-30 16:49:33,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:49:33,838 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 171 treesize of output 165 [2021-08-30 16:49:33,916 INFO L354 Elim1Store]: treesize reduction 6, result has 53.8 percent of original size [2021-08-30 16:49:33,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2021-08-30 16:49:33,943 INFO L354 Elim1Store]: treesize reduction 9, result has 76.9 percent of original size [2021-08-30 16:49:33,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 96 [2021-08-30 16:49:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 24 proven. 339 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:49:34,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729886410] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:49:34,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:49:34,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 37, 36] total 94 [2021-08-30 16:49:34,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504148894] [2021-08-30 16:49:34,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-08-30 16:49:34,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:49:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-08-30 16:49:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=8364, Unknown=15, NotChecked=0, Total=8742 [2021-08-30 16:49:34,742 INFO L87 Difference]: Start difference. First operand 2698 states and 3061 transitions. Second operand has 94 states, 92 states have (on average 3.369565217391304) internal successors, (310), 90 states have internal predecessors, (310), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:49:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:49:36,393 INFO L93 Difference]: Finished difference Result 2807 states and 3174 transitions. [2021-08-30 16:49:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-30 16:49:36,394 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 3.369565217391304) internal successors, (310), 90 states have internal predecessors, (310), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-08-30 16:49:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:49:36,396 INFO L225 Difference]: With dead ends: 2807 [2021-08-30 16:49:36,396 INFO L226 Difference]: Without dead ends: 2781 [2021-08-30 16:49:36,397 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 30698.69ms TimeCoverageRelationStatistics Valid=520, Invalid=11675, Unknown=15, NotChecked=0, Total=12210 [2021-08-30 16:49:36,397 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 69 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 616.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.39ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1539 IncrementalHoareTripleChecker+Unchecked, 755.50ms IncrementalHoareTripleChecker+Time [2021-08-30 16:49:36,397 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 206 Invalid, 3575 Unknown, 0 Unchecked, 5.39ms Time], IncrementalHoareTripleChecker [25 Valid, 2011 Invalid, 0 Unknown, 1539 Unchecked, 755.50ms Time] [2021-08-30 16:49:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-08-30 16:49:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2698. [2021-08-30 16:49:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2698 states, 2680 states have (on average 1.135820895522388) internal successors, (3044), 2680 states have internal predecessors, (3044), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:49:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2698 states to 2698 states and 3061 transitions. [2021-08-30 16:49:36,415 INFO L78 Accepts]: Start accepts. Automaton has 2698 states and 3061 transitions. Word has length 121 [2021-08-30 16:49:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:49:36,415 INFO L470 AbstractCegarLoop]: Abstraction has 2698 states and 3061 transitions. [2021-08-30 16:49:36,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 3.369565217391304) internal successors, (310), 90 states have internal predecessors, (310), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:49:36,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2698 states and 3061 transitions. [2021-08-30 16:49:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-30 16:49:36,417 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:49:36,417 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:49:36,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-30 16:49:36,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:49:36,637 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:49:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:49:36,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1487445812, now seen corresponding path program 45 times [2021-08-30 16:49:36,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:49:36,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814545772] [2021-08-30 16:49:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:49:36,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:49:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:49:37,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:49:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:49:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 351 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:49:37,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:49:37,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814545772] [2021-08-30 16:49:37,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814545772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:49:37,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288963346] [2021-08-30 16:49:37,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:49:37,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:49:37,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:49:37,114 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:49:37,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-30 16:49:37,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-30 16:49:37,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:49:37,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 104 conjunts are in the unsatisfiable core [2021-08-30 16:49:37,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:49:37,348 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 [2021-08-30 16:49:37,785 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 [2021-08-30 16:49:37,836 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:49:37,837 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 [2021-08-30 16:49:39,345 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:49:39,345 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 [2021-08-30 16:49:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 17 proven. 350 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:49:39,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:49:49,623 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 13 [2021-08-30 16:49:49,624 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 26 treesize of output 22 [2021-08-30 16:49:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 351 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:49:50,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288963346] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:49:50,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:49:50,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 26] total 64 [2021-08-30 16:49:50,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815646095] [2021-08-30 16:49:50,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-30 16:49:50,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:49:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-30 16:49:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3845, Unknown=0, NotChecked=0, Total=4032 [2021-08-30 16:49:50,030 INFO L87 Difference]: Start difference. First operand 2698 states and 3061 transitions. Second operand has 64 states, 63 states have (on average 4.015873015873016) internal successors, (253), 60 states have internal predecessors, (253), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:49:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:49:51,475 INFO L93 Difference]: Finished difference Result 3193 states and 3580 transitions. [2021-08-30 16:49:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-30 16:49:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.015873015873016) internal successors, (253), 60 states have internal predecessors, (253), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-08-30 16:49:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:49:51,477 INFO L225 Difference]: With dead ends: 3193 [2021-08-30 16:49:51,478 INFO L226 Difference]: Without dead ends: 2733 [2021-08-30 16:49:51,478 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 12470.76ms TimeCoverageRelationStatistics Valid=365, Invalid=7825, Unknown=0, NotChecked=0, Total=8190 [2021-08-30 16:49:51,479 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 478.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.04ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1841 IncrementalHoareTripleChecker+Unchecked, 577.84ms IncrementalHoareTripleChecker+Time [2021-08-30 16:49:51,479 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 180 Invalid, 3896 Unknown, 0 Unchecked, 3.04ms Time], IncrementalHoareTripleChecker [18 Valid, 2037 Invalid, 0 Unknown, 1841 Unchecked, 577.84ms Time] [2021-08-30 16:49:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-08-30 16:49:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2669. [2021-08-30 16:49:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2651 states have (on average 1.1339117314221048) internal successors, (3006), 2651 states have internal predecessors, (3006), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:49:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 3023 transitions. [2021-08-30 16:49:51,506 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 3023 transitions. Word has length 123 [2021-08-30 16:49:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:49:51,507 INFO L470 AbstractCegarLoop]: Abstraction has 2669 states and 3023 transitions. [2021-08-30 16:49:51,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.015873015873016) internal successors, (253), 60 states have internal predecessors, (253), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:49:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 3023 transitions. [2021-08-30 16:49:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-30 16:49:51,509 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:49:51,509 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:49:51,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-30 16:49:51,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:49:51,724 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:49:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:49:51,725 INFO L82 PathProgramCache]: Analyzing trace with hash -687440476, now seen corresponding path program 46 times [2021-08-30 16:49:51,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:49:51,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761156834] [2021-08-30 16:49:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:49:51,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:49:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:49:52,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:49:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:49:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 350 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:49:52,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:49:52,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761156834] [2021-08-30 16:49:52,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761156834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:49:52,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245350267] [2021-08-30 16:49:52,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:49:52,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:49:52,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:49:52,376 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:49:52,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-30 16:49:52,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:49:52,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:49:52,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-30 16:49:52,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:49:52,516 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:49:52,516 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 [2021-08-30 16:49:53,577 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 [2021-08-30 16:49:53,646 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:49:53,646 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 34 treesize of output 33 [2021-08-30 16:49:55,812 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:49:55,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 56 [2021-08-30 16:49:55,820 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:49:55,820 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 56 treesize of output 41 [2021-08-30 16:49:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 215 proven. 157 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:49:55,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:49:58,221 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 61 treesize of output 57 [2021-08-30 16:50:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 216 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 16:50:00,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245350267] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:50:00,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:50:00,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 94 [2021-08-30 16:50:00,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138031256] [2021-08-30 16:50:00,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-08-30 16:50:00,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:50:00,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-08-30 16:50:00,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=8263, Unknown=1, NotChecked=0, Total=8742 [2021-08-30 16:50:00,225 INFO L87 Difference]: Start difference. First operand 2669 states and 3023 transitions. Second operand has 94 states, 92 states have (on average 3.510869565217391) internal successors, (323), 90 states have internal predecessors, (323), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:10,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:50:10,708 INFO L93 Difference]: Finished difference Result 4972 states and 5685 transitions. [2021-08-30 16:50:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-30 16:50:10,708 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 3.510869565217391) internal successors, (323), 90 states have internal predecessors, (323), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-08-30 16:50:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:50:10,711 INFO L225 Difference]: With dead ends: 4972 [2021-08-30 16:50:10,711 INFO L226 Difference]: Without dead ends: 4972 [2021-08-30 16:50:10,713 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6736 ImplicationChecksByTransitivity, 14342.76ms TimeCoverageRelationStatistics Valid=1896, Invalid=29964, Unknown=2, NotChecked=0, Total=31862 [2021-08-30 16:50:10,713 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 234 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 852.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 3515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.21ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 759 IncrementalHoareTripleChecker+Unchecked, 1025.31ms IncrementalHoareTripleChecker+Time [2021-08-30 16:50:10,713 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 213 Invalid, 3515 Unknown, 0 Unchecked, 6.21ms Time], IncrementalHoareTripleChecker [89 Valid, 2667 Invalid, 0 Unknown, 759 Unchecked, 1025.31ms Time] [2021-08-30 16:50:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2021-08-30 16:50:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 4654. [2021-08-30 16:50:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 4636 states have (on average 1.1449525452976703) internal successors, (5308), 4636 states have internal predecessors, (5308), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 5325 transitions. [2021-08-30 16:50:10,781 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 5325 transitions. Word has length 123 [2021-08-30 16:50:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:50:10,781 INFO L470 AbstractCegarLoop]: Abstraction has 4654 states and 5325 transitions. [2021-08-30 16:50:10,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 3.510869565217391) internal successors, (323), 90 states have internal predecessors, (323), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 5325 transitions. [2021-08-30 16:50:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-30 16:50:10,783 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:50:10,783 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:50:10,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-30 16:50:10,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:50:10,999 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:50:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:50:11,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1224833008, now seen corresponding path program 47 times [2021-08-30 16:50:11,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:50:11,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540579085] [2021-08-30 16:50:11,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:50:11,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:50:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:50:11,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:50:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:50:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 350 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:50:11,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:50:11,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540579085] [2021-08-30 16:50:11,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540579085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:50:11,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570037620] [2021-08-30 16:50:11,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:50:11,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:50:11,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:50:11,637 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:50:11,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-30 16:50:11,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-30 16:50:11,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:50:11,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 148 conjunts are in the unsatisfiable core [2021-08-30 16:50:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:50:11,807 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 [2021-08-30 16:50:12,378 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 [2021-08-30 16:50:12,440 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 [2021-08-30 16:50:15,049 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:50:15,050 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 52 treesize of output 34 [2021-08-30 16:50:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 351 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:50:15,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:50:16,511 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~length2~0 Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) c_main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse0 (select .cse1 c_main_~nondetString2~0.offset))) (or (not (= .cse0 (select (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse1) c_main_~nondetString1~0.base) (+ 7 c_main_~nondetString1~0.offset)))) (= .cse0 0))))) is different from false [2021-08-30 16:50:16,524 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:50:16,524 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 199 treesize of output 159 [2021-08-30 16:50:16,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:50:16,529 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 155 treesize of output 149 [2021-08-30 16:50:16,595 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-08-30 16:50:16,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-08-30 16:50:16,650 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-08-30 16:50:16,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-08-30 16:50:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 350 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:50:17,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570037620] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:50:17,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:50:17,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 34] total 89 [2021-08-30 16:50:17,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129735604] [2021-08-30 16:50:17,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-08-30 16:50:17,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:50:17,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-08-30 16:50:17,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=7390, Unknown=1, NotChecked=172, Total=7832 [2021-08-30 16:50:17,372 INFO L87 Difference]: Start difference. First operand 4654 states and 5325 transitions. Second operand has 89 states, 87 states have (on average 3.218390804597701) internal successors, (280), 85 states have internal predecessors, (280), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:50:21,087 INFO L93 Difference]: Finished difference Result 5431 states and 6179 transitions. [2021-08-30 16:50:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-30 16:50:21,088 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 87 states have (on average 3.218390804597701) internal successors, (280), 85 states have internal predecessors, (280), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-08-30 16:50:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:50:21,091 INFO L225 Difference]: With dead ends: 5431 [2021-08-30 16:50:21,091 INFO L226 Difference]: Without dead ends: 5431 [2021-08-30 16:50:21,092 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 6636.18ms TimeCoverageRelationStatistics Valid=639, Invalid=18270, Unknown=1, NotChecked=272, Total=19182 [2021-08-30 16:50:21,092 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 153 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 841.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 6069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.63ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3213 IncrementalHoareTripleChecker+Unchecked, 1022.57ms IncrementalHoareTripleChecker+Time [2021-08-30 16:50:21,092 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 232 Invalid, 6069 Unknown, 0 Unchecked, 8.63ms Time], IncrementalHoareTripleChecker [15 Valid, 2841 Invalid, 0 Unknown, 3213 Unchecked, 1022.57ms Time] [2021-08-30 16:50:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-08-30 16:50:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 5204. [2021-08-30 16:50:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5204 states, 5186 states have (on average 1.1440416505977633) internal successors, (5933), 5186 states have internal predecessors, (5933), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5204 states to 5204 states and 5950 transitions. [2021-08-30 16:50:21,137 INFO L78 Accepts]: Start accepts. Automaton has 5204 states and 5950 transitions. Word has length 123 [2021-08-30 16:50:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:50:21,137 INFO L470 AbstractCegarLoop]: Abstraction has 5204 states and 5950 transitions. [2021-08-30 16:50:21,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 87 states have (on average 3.218390804597701) internal successors, (280), 85 states have internal predecessors, (280), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5204 states and 5950 transitions. [2021-08-30 16:50:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-30 16:50:21,141 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:50:21,141 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:50:21,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-30 16:50:21,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-30 16:50:21,363 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:50:21,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:50:21,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1449153466, now seen corresponding path program 48 times [2021-08-30 16:50:21,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:50:21,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312166567] [2021-08-30 16:50:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:50:21,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:50:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:50:22,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:50:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:50:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 350 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:50:22,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:50:22,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312166567] [2021-08-30 16:50:22,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312166567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:50:22,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642516449] [2021-08-30 16:50:22,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:50:22,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:50:22,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:50:22,034 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:50:22,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-30 16:50:22,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-30 16:50:22,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:50:22,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-30 16:50:22,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:50:22,253 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 [2021-08-30 16:50:22,256 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 [2021-08-30 16:50:23,099 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 16 treesize of output 12 [2021-08-30 16:50:23,165 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:50:23,166 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 33 treesize of output 32 [2021-08-30 16:50:25,062 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 16:50:25,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-08-30 16:50:25,070 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:50:25,070 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 48 treesize of output 33 [2021-08-30 16:50:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 221 proven. 145 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:50:25,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:50:27,663 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 58 treesize of output 54 [2021-08-30 16:50:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 221 proven. 145 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:50:28,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642516449] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:50:28,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:50:28,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 26, 26] total 80 [2021-08-30 16:50:28,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227184261] [2021-08-30 16:50:28,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-08-30 16:50:28,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:50:28,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-08-30 16:50:28,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=5945, Unknown=1, NotChecked=0, Total=6320 [2021-08-30 16:50:28,802 INFO L87 Difference]: Start difference. First operand 5204 states and 5950 transitions. Second operand has 80 states, 78 states have (on average 4.038461538461538) internal successors, (315), 76 states have internal predecessors, (315), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:50:31,803 INFO L93 Difference]: Finished difference Result 8527 states and 9760 transitions. [2021-08-30 16:50:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-30 16:50:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 4.038461538461538) internal successors, (315), 76 states have internal predecessors, (315), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-08-30 16:50:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:50:31,809 INFO L225 Difference]: With dead ends: 8527 [2021-08-30 16:50:31,809 INFO L226 Difference]: Without dead ends: 8527 [2021-08-30 16:50:31,810 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 6292.22ms TimeCoverageRelationStatistics Valid=952, Invalid=13327, Unknown=1, NotChecked=0, Total=14280 [2021-08-30 16:50:31,810 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 164 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 738.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.32ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 625 IncrementalHoareTripleChecker+Unchecked, 888.78ms IncrementalHoareTripleChecker+Time [2021-08-30 16:50:31,811 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 177 Invalid, 2937 Unknown, 0 Unchecked, 5.32ms Time], IncrementalHoareTripleChecker [28 Valid, 2284 Invalid, 0 Unknown, 625 Unchecked, 888.78ms Time] [2021-08-30 16:50:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2021-08-30 16:50:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 6904. [2021-08-30 16:50:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6886 states have (on average 1.1437699680511182) internal successors, (7876), 6886 states have internal predecessors, (7876), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 7893 transitions. [2021-08-30 16:50:31,873 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 7893 transitions. Word has length 123 [2021-08-30 16:50:31,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:50:31,873 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 7893 transitions. [2021-08-30 16:50:31,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 78 states have (on average 4.038461538461538) internal successors, (315), 76 states have internal predecessors, (315), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 7893 transitions. [2021-08-30 16:50:31,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-30 16:50:31,877 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:50:31,877 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 8, 7, 7, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:50:31,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-30 16:50:32,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-30 16:50:32,093 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:50:32,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:50:32,093 INFO L82 PathProgramCache]: Analyzing trace with hash -353054577, now seen corresponding path program 49 times [2021-08-30 16:50:32,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:50:32,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444225972] [2021-08-30 16:50:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:50:32,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:50:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:50:32,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:50:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:50:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 14 proven. 385 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:50:32,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:50:32,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444225972] [2021-08-30 16:50:32,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444225972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:50:32,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362671634] [2021-08-30 16:50:32,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:50:32,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:50:32,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:50:32,521 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:50:32,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-30 16:50:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:50:32,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 152 conjunts are in the unsatisfiable core [2021-08-30 16:50:32,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:50:32,718 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:50:32,719 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 [2021-08-30 16:50:33,393 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 [2021-08-30 16:50:33,455 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-30 16:50:33,455 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 33 treesize of output 32 [2021-08-30 16:50:35,184 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:50:35,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2021-08-30 16:50:37,240 INFO L354 Elim1Store]: treesize reduction 126, result has 8.0 percent of original size [2021-08-30 16:50:37,241 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 72 treesize of output 54 [2021-08-30 16:50:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 14 proven. 400 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:50:37,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:50:42,842 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-08-30 16:50:42,843 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 233 treesize of output 198 [2021-08-30 16:50:42,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:50:42,848 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 198 treesize of output 192 [2021-08-30 16:50:42,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:50:42,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 74 [2021-08-30 16:50:43,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:50:43,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 163 treesize of output 209 [2021-08-30 16:50:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 22 proven. 392 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:50:52,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362671634] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:50:52,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:50:52,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 42, 42] total 105 [2021-08-30 16:50:52,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649175952] [2021-08-30 16:50:52,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-08-30 16:50:52,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:50:52,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-08-30 16:50:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=10463, Unknown=2, NotChecked=0, Total=10920 [2021-08-30 16:50:52,706 INFO L87 Difference]: Start difference. First operand 6904 states and 7893 transitions. Second operand has 105 states, 103 states have (on average 3.0776699029126213) internal successors, (317), 101 states have internal predecessors, (317), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:50:54,616 INFO L93 Difference]: Finished difference Result 6935 states and 7923 transitions. [2021-08-30 16:50:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-30 16:50:54,616 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 103 states have (on average 3.0776699029126213) internal successors, (317), 101 states have internal predecessors, (317), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-08-30 16:50:54,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:50:54,622 INFO L225 Difference]: With dead ends: 6935 [2021-08-30 16:50:54,623 INFO L226 Difference]: Without dead ends: 6896 [2021-08-30 16:50:54,624 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 13907.22ms TimeCoverageRelationStatistics Valid=722, Invalid=15788, Unknown=2, NotChecked=0, Total=16512 [2021-08-30 16:50:54,624 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 72 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 368.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1695 IncrementalHoareTripleChecker+Unchecked, 441.88ms IncrementalHoareTripleChecker+Time [2021-08-30 16:50:54,624 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 278 Invalid, 2956 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [14 Valid, 1247 Invalid, 0 Unknown, 1695 Unchecked, 441.88ms Time] [2021-08-30 16:50:54,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6896 states. [2021-08-30 16:50:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6896 to 6896. [2021-08-30 16:50:54,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6896 states, 6878 states have (on average 1.1437917999418437) internal successors, (7867), 6878 states have internal predecessors, (7867), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6896 states to 6896 states and 7884 transitions. [2021-08-30 16:50:54,688 INFO L78 Accepts]: Start accepts. Automaton has 6896 states and 7884 transitions. Word has length 126 [2021-08-30 16:50:54,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:50:54,689 INFO L470 AbstractCegarLoop]: Abstraction has 6896 states and 7884 transitions. [2021-08-30 16:50:54,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 103 states have (on average 3.0776699029126213) internal successors, (317), 101 states have internal predecessors, (317), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:50:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 6896 states and 7884 transitions. [2021-08-30 16:50:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-30 16:50:54,693 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:50:54,693 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 8, 7, 7, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:50:54,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-30 16:50:54,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-30 16:50:54,907 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:50:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:50:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1997996357, now seen corresponding path program 50 times [2021-08-30 16:50:54,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:50:54,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473500744] [2021-08-30 16:50:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:50:54,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:50:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:50:55,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:50:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:50:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 14 proven. 385 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:50:55,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:50:55,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473500744] [2021-08-30 16:50:55,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473500744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:50:55,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303067314] [2021-08-30 16:50:55,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:50:55,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:50:55,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:50:55,311 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:50:55,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-30 16:50:55,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:50:55,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:50:55,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 150 conjunts are in the unsatisfiable core [2021-08-30 16:50:55,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:50:55,465 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 [2021-08-30 16:50:55,873 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 [2021-08-30 16:50:55,918 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 [2021-08-30 16:50:58,085 INFO L354 Elim1Store]: treesize reduction 75, result has 9.6 percent of original size [2021-08-30 16:50:58,085 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 34 [2021-08-30 16:50:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 14 proven. 399 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-30 16:50:58,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:50:59,610 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse0 (select .cse1 (+ main_~nondetString2~0.offset 1)))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse1) c_main_~nondetString1~0.base) (+ 6 c_main_~nondetString1~0.offset)) .cse0)))))) is different from false [2021-08-30 16:50:59,620 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:50:59,621 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-08-30 16:50:59,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:50:59,625 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 173 treesize of output 167 [2021-08-30 16:50:59,669 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-08-30 16:50:59,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-08-30 16:50:59,707 INFO L354 Elim1Store]: treesize reduction 13, result has 66.7 percent of original size [2021-08-30 16:50:59,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 88 [2021-08-30 16:51:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 24 proven. 384 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-30 16:51:00,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303067314] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:51:00,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:51:00,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 36, 35] total 92 [2021-08-30 16:51:00,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177217495] [2021-08-30 16:51:00,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-08-30 16:51:00,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-08-30 16:51:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=7838, Unknown=1, NotChecked=178, Total=8372 [2021-08-30 16:51:00,077 INFO L87 Difference]: Start difference. First operand 6896 states and 7884 transitions. Second operand has 92 states, 90 states have (on average 3.477777777777778) internal successors, (313), 88 states have internal predecessors, (313), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:03,431 INFO L93 Difference]: Finished difference Result 6974 states and 7961 transitions. [2021-08-30 16:51:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-30 16:51:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 90 states have (on average 3.477777777777778) internal successors, (313), 88 states have internal predecessors, (313), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-08-30 16:51:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:03,437 INFO L225 Difference]: With dead ends: 6974 [2021-08-30 16:51:03,437 INFO L226 Difference]: Without dead ends: 6922 [2021-08-30 16:51:03,438 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 191 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 5879.31ms TimeCoverageRelationStatistics Valid=726, Invalid=15789, Unknown=1, NotChecked=254, Total=16770 [2021-08-30 16:51:03,438 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 84 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 453.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.58ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 799 IncrementalHoareTripleChecker+Unchecked, 575.86ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:03,439 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 187 Invalid, 2927 Unknown, 0 Unchecked, 3.58ms Time], IncrementalHoareTripleChecker [27 Valid, 2101 Invalid, 0 Unknown, 799 Unchecked, 575.86ms Time] [2021-08-30 16:51:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2021-08-30 16:51:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 6862. [2021-08-30 16:51:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 6844 states have (on average 1.1442139099941555) internal successors, (7831), 6844 states have internal predecessors, (7831), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 7848 transitions. [2021-08-30 16:51:03,497 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 7848 transitions. Word has length 126 [2021-08-30 16:51:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:03,497 INFO L470 AbstractCegarLoop]: Abstraction has 6862 states and 7848 transitions. [2021-08-30 16:51:03,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 90 states have (on average 3.477777777777778) internal successors, (313), 88 states have internal predecessors, (313), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 7848 transitions. [2021-08-30 16:51:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-30 16:51:03,501 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:03,501 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 8, 7, 7, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:03,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-30 16:51:03,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-30 16:51:03,720 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:51:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:03,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1702820741, now seen corresponding path program 51 times [2021-08-30 16:51:03,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:03,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283837916] [2021-08-30 16:51:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:03,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:04,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 14 proven. 385 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:51:04,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:04,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283837916] [2021-08-30 16:51:04,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283837916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:51:04,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603052517] [2021-08-30 16:51:04,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:51:04,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:04,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:04,059 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:51:04,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-30 16:51:04,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-30 16:51:04,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:51:04,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-30 16:51:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:51:04,276 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 [2021-08-30 16:51:04,648 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 [2021-08-30 16:51:04,697 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:51:04,697 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 [2021-08-30 16:51:05,993 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:51:05,993 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 [2021-08-30 16:51:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 15 proven. 384 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:51:06,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:51:14,782 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 13 [2021-08-30 16:51:14,783 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 26 treesize of output 22 [2021-08-30 16:51:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 14 proven. 385 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:51:15,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603052517] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:51:15,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:51:15,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 59 [2021-08-30 16:51:15,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584272189] [2021-08-30 16:51:15,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-30 16:51:15,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:15,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-30 16:51:15,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3249, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:51:15,221 INFO L87 Difference]: Start difference. First operand 6862 states and 7848 transitions. Second operand has 59 states, 58 states have (on average 3.9827586206896552) internal successors, (231), 55 states have internal predecessors, (231), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:16,576 INFO L93 Difference]: Finished difference Result 6964 states and 7951 transitions. [2021-08-30 16:51:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-30 16:51:16,576 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.9827586206896552) internal successors, (231), 55 states have internal predecessors, (231), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-08-30 16:51:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:16,581 INFO L225 Difference]: With dead ends: 6964 [2021-08-30 16:51:16,581 INFO L226 Difference]: Without dead ends: 6951 [2021-08-30 16:51:16,581 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 10737.69ms TimeCoverageRelationStatistics Valid=340, Invalid=6632, Unknown=0, NotChecked=0, Total=6972 [2021-08-30 16:51:16,581 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 404.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.78ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1634 IncrementalHoareTripleChecker+Unchecked, 493.60ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:16,582 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 148 Invalid, 3114 Unknown, 0 Unchecked, 3.78ms Time], IncrementalHoareTripleChecker [16 Valid, 1464 Invalid, 0 Unknown, 1634 Unchecked, 493.60ms Time] [2021-08-30 16:51:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-08-30 16:51:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 6891. [2021-08-30 16:51:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6891 states, 6873 states have (on average 1.1437509093554488) internal successors, (7861), 6873 states have internal predecessors, (7861), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6891 states to 6891 states and 7878 transitions. [2021-08-30 16:51:16,627 INFO L78 Accepts]: Start accepts. Automaton has 6891 states and 7878 transitions. Word has length 126 [2021-08-30 16:51:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:16,628 INFO L470 AbstractCegarLoop]: Abstraction has 6891 states and 7878 transitions. [2021-08-30 16:51:16,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.9827586206896552) internal successors, (231), 55 states have internal predecessors, (231), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 6891 states and 7878 transitions. [2021-08-30 16:51:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-30 16:51:16,631 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:16,631 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 8, 7, 7, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:16,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-30 16:51:16,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:16,849 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:51:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:16,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1478315761, now seen corresponding path program 52 times [2021-08-30 16:51:16,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:16,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050778958] [2021-08-30 16:51:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:16,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:17,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 14 proven. 385 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:51:17,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:17,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050778958] [2021-08-30 16:51:17,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050778958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:51:17,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464439777] [2021-08-30 16:51:17,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:51:17,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:17,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:17,264 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:51:17,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-30 16:51:17,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:51:17,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:51:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-30 16:51:17,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:51:17,403 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 [2021-08-30 16:51:17,409 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 [2021-08-30 16:51:18,015 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 16 treesize of output 12 [2021-08-30 16:51:18,065 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:51:18,065 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 33 treesize of output 32 [2021-08-30 16:51:19,632 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 16:51:19,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-08-30 16:51:19,639 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:51:19,640 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 48 treesize of output 33 [2021-08-30 16:51:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 231 proven. 168 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:51:19,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:51:21,388 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 58 treesize of output 54 [2021-08-30 16:51:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 230 proven. 169 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:51:21,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464439777] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:51:21,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:51:21,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 65 [2021-08-30 16:51:21,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403026469] [2021-08-30 16:51:21,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-08-30 16:51:21,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:21,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-08-30 16:51:21,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3864, Unknown=1, NotChecked=0, Total=4160 [2021-08-30 16:51:21,996 INFO L87 Difference]: Start difference. First operand 6891 states and 7878 transitions. Second operand has 65 states, 63 states have (on average 4.476190476190476) internal successors, (282), 61 states have internal predecessors, (282), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:25,743 INFO L93 Difference]: Finished difference Result 7048 states and 8042 transitions. [2021-08-30 16:51:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-30 16:51:25,743 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 4.476190476190476) internal successors, (282), 61 states have internal predecessors, (282), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-08-30 16:51:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:25,748 INFO L225 Difference]: With dead ends: 7048 [2021-08-30 16:51:25,748 INFO L226 Difference]: Without dead ends: 7029 [2021-08-30 16:51:25,749 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 5957.87ms TimeCoverageRelationStatistics Valid=820, Invalid=9279, Unknown=1, NotChecked=0, Total=10100 [2021-08-30 16:51:25,750 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 86 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 361.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.59ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1309 IncrementalHoareTripleChecker+Unchecked, 422.66ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:25,750 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 142 Invalid, 2820 Unknown, 0 Unchecked, 2.59ms Time], IncrementalHoareTripleChecker [17 Valid, 1494 Invalid, 0 Unknown, 1309 Unchecked, 422.66ms Time] [2021-08-30 16:51:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7029 states. [2021-08-30 16:51:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7029 to 6953. [2021-08-30 16:51:25,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6953 states, 6935 states have (on average 1.1433309300648882) internal successors, (7929), 6935 states have internal predecessors, (7929), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6953 states to 6953 states and 7946 transitions. [2021-08-30 16:51:25,805 INFO L78 Accepts]: Start accepts. Automaton has 6953 states and 7946 transitions. Word has length 126 [2021-08-30 16:51:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:25,806 INFO L470 AbstractCegarLoop]: Abstraction has 6953 states and 7946 transitions. [2021-08-30 16:51:25,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 4.476190476190476) internal successors, (282), 61 states have internal predecessors, (282), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 6953 states and 7946 transitions. [2021-08-30 16:51:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-30 16:51:25,809 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:25,809 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 8, 7, 7, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:25,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-30 16:51:26,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-30 16:51:26,022 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:51:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash 974312261, now seen corresponding path program 53 times [2021-08-30 16:51:26,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:26,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145692280] [2021-08-30 16:51:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:26,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:26,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 14 proven. 385 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:51:26,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:26,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145692280] [2021-08-30 16:51:26,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145692280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:51:26,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680228801] [2021-08-30 16:51:26,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:51:26,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:26,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:26,294 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:51:26,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-30 16:51:26,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-30 16:51:26,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:51:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 152 conjunts are in the unsatisfiable core [2021-08-30 16:51:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:51:26,453 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:51:26,453 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 [2021-08-30 16:51:26,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:51:26,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2021-08-30 16:51:27,210 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 26 treesize of output 22 [2021-08-30 16:51:27,262 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 39 treesize of output 38 [2021-08-30 16:51:29,663 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:51:29,663 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 61 treesize of output 43 [2021-08-30 16:51:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 14 proven. 400 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:51:29,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:51:30,657 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:51:30,658 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-08-30 16:51:30,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:51:30,661 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 173 treesize of output 167 [2021-08-30 16:51:30,668 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-08-30 16:51:30,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 137 [2021-08-30 16:51:30,699 INFO L354 Elim1Store]: treesize reduction 13, result has 66.7 percent of original size [2021-08-30 16:51:30,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 101 [2021-08-30 16:51:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 15 proven. 399 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 16:51:32,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680228801] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:51:32,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:51:32,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 39, 39] total 99 [2021-08-30 16:51:32,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108717895] [2021-08-30 16:51:32,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-30 16:51:32,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:32,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-30 16:51:32,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=9283, Unknown=0, NotChecked=0, Total=9702 [2021-08-30 16:51:32,126 INFO L87 Difference]: Start difference. First operand 6953 states and 7946 transitions. Second operand has 99 states, 97 states have (on average 3.268041237113402) internal successors, (317), 95 states have internal predecessors, (317), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:33,923 INFO L93 Difference]: Finished difference Result 6979 states and 7972 transitions. [2021-08-30 16:51:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-30 16:51:33,923 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 97 states have (on average 3.268041237113402) internal successors, (317), 95 states have internal predecessors, (317), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-08-30 16:51:33,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:33,929 INFO L225 Difference]: With dead ends: 6979 [2021-08-30 16:51:33,929 INFO L226 Difference]: Without dead ends: 6966 [2021-08-30 16:51:33,930 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 4670.53ms TimeCoverageRelationStatistics Valid=757, Invalid=14743, Unknown=0, NotChecked=0, Total=15500 [2021-08-30 16:51:33,930 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 147 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 433.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.47ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 506.48ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:33,930 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 200 Invalid, 2168 Unknown, 0 Unchecked, 2.47ms Time], IncrementalHoareTripleChecker [59 Valid, 1878 Invalid, 0 Unknown, 231 Unchecked, 506.48ms Time] [2021-08-30 16:51:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6966 states. [2021-08-30 16:51:33,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6966 to 6966. [2021-08-30 16:51:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6966 states, 6948 states have (on average 1.1430627518710421) internal successors, (7942), 6948 states have internal predecessors, (7942), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6966 states to 6966 states and 7959 transitions. [2021-08-30 16:51:33,987 INFO L78 Accepts]: Start accepts. Automaton has 6966 states and 7959 transitions. Word has length 126 [2021-08-30 16:51:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:33,987 INFO L470 AbstractCegarLoop]: Abstraction has 6966 states and 7959 transitions. [2021-08-30 16:51:33,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 97 states have (on average 3.268041237113402) internal successors, (317), 95 states have internal predecessors, (317), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:33,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6966 states and 7959 transitions. [2021-08-30 16:51:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-30 16:51:33,991 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:33,991 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 8, 7, 7, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:34,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-30 16:51:34,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-30 16:51:34,209 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting cstrspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-08-30 16:51:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:34,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2088143055, now seen corresponding path program 54 times [2021-08-30 16:51:34,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:34,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933507267] [2021-08-30 16:51:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:34,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:34,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 14 proven. 385 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-30 16:51:34,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:34,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933507267] [2021-08-30 16:51:34,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933507267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:51:34,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188810973] [2021-08-30 16:51:34,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:51:34,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:34,478 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:51:34,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-30 16:51:34,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-30 16:51:34,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:51:34,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-30 16:51:34,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:51:34,661 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:51:34,661 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 [2021-08-30 16:51:34,665 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 [2021-08-30 16:51:34,846 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 [2021-08-30 16:51:34,872 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-08-30 16:51:34,872 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 32 treesize of output 31 [2021-08-30 16:51:35,495 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-08-30 16:51:35,495 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 37 treesize of output 24 [2021-08-30 16:51:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 7 proven. 110 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-08-30 16:51:35,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:51:36,841 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 31 treesize of output 29 [2021-08-30 16:51:36,842 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 41 treesize of output 37 [2021-08-30 16:51:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-08-30 16:51:36,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188810973] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:51:36,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:51:36,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 11] total 47 [2021-08-30 16:51:36,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588037553] [2021-08-30 16:51:36,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-30 16:51:36,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-30 16:51:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2021-08-30 16:51:36,971 INFO L87 Difference]: Start difference. First operand 6966 states and 7959 transitions. Second operand has 47 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 43 states have internal predecessors, (176), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:38,714 INFO L93 Difference]: Finished difference Result 6999 states and 7844 transitions. [2021-08-30 16:51:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-30 16:51:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 43 states have internal predecessors, (176), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-08-30 16:51:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:38,715 INFO L225 Difference]: With dead ends: 6999 [2021-08-30 16:51:38,715 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 16:51:38,716 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 2385.21ms TimeCoverageRelationStatistics Valid=640, Invalid=9460, Unknown=0, NotChecked=0, Total=10100 [2021-08-30 16:51:38,716 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 262.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 309.13ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:38,716 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 126 Invalid, 1560 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [10 Valid, 1253 Invalid, 0 Unknown, 297 Unchecked, 309.13ms Time] [2021-08-30 16:51:38,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 16:51:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 16:51:38,717 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) [2021-08-30 16:51:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 16:51:38,717 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 126 [2021-08-30 16:51:38,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:38,717 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 16:51:38,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 43 states have internal predecessors, (176), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:38,717 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 16:51:38,718 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 16:51:38,719 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (12 of 13 remaining) [2021-08-30 16:51:38,720 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (11 of 13 remaining) [2021-08-30 16:51:38,720 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (10 of 13 remaining) [2021-08-30 16:51:38,720 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (9 of 13 remaining) [2021-08-30 16:51:38,720 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION (8 of 13 remaining) [2021-08-30 16:51:38,720 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION (7 of 13 remaining) [2021-08-30 16:51:38,720 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION (6 of 13 remaining) [2021-08-30 16:51:38,720 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION (5 of 13 remaining) [2021-08-30 16:51:38,721 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK (4 of 13 remaining) [2021-08-30 16:51:38,721 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr0REQUIRES_VIOLATION (3 of 13 remaining) [2021-08-30 16:51:38,721 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr1REQUIRES_VIOLATION (2 of 13 remaining) [2021-08-30 16:51:38,721 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr2REQUIRES_VIOLATION (1 of 13 remaining) [2021-08-30 16:51:38,721 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrspnErr3REQUIRES_VIOLATION (0 of 13 remaining) [2021-08-30 16:51:38,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-30 16:51:38,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-30 16:51:38,943 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:51:38,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:51:38 BoogieIcfgContainer [2021-08-30 16:51:38,945 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:51:38,945 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:51:38,945 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:51:38,945 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:51:38,946 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:38:46" (3/4) ... [2021-08-30 16:51:38,947 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 16:51:38,951 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 16:51:38,951 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-30 16:51:38,951 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-30 16:51:38,952 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-30 16:51:38,952 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-30 16:51:38,952 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 16:51:38,952 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrspn [2021-08-30 16:51:38,952 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-30 16:51:38,954 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-08-30 16:51:38,955 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-30 16:51:38,955 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:51:38,955 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:51:38,980 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 16:51:38,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:51:38,980 INFO L158 Benchmark]: Toolchain (without parser) took 773462.67ms. Allocated memory was 73.4MB in the beginning and 629.1MB in the end (delta: 555.7MB). Free memory was 54.0MB in the beginning and 302.6MB in the end (delta: -248.6MB). Peak memory consumption was 305.2MB. Max. memory is 16.1GB. [2021-08-30 16:51:38,980 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 73.4MB. Free memory was 54.0MB in the beginning and 54.0MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:51:38,980 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.99ms. Allocated memory is still 73.4MB. Free memory was 53.9MB in the beginning and 51.0MB in the end (delta: 2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-30 16:51:38,980 INFO L158 Benchmark]: Boogie Preprocessor took 58.76ms. Allocated memory is still 73.4MB. Free memory was 51.0MB in the beginning and 48.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:51:38,981 INFO L158 Benchmark]: RCFGBuilder took 410.94ms. Allocated memory is still 73.4MB. Free memory was 48.4MB in the beginning and 53.3MB in the end (delta: -4.9MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. [2021-08-30 16:51:38,981 INFO L158 Benchmark]: TraceAbstraction took 772626.61ms. Allocated memory was 73.4MB in the beginning and 629.1MB in the end (delta: 555.7MB). Free memory was 53.0MB in the beginning and 306.3MB in the end (delta: -253.3MB). Peak memory consumption was 303.3MB. Max. memory is 16.1GB. [2021-08-30 16:51:38,981 INFO L158 Benchmark]: Witness Printer took 34.96ms. Allocated memory is still 629.1MB. Free memory was 306.3MB in the beginning and 302.6MB in the end (delta: 3.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:51:38,981 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 73.4MB. Free memory was 54.0MB in the beginning and 54.0MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 327.99ms. Allocated memory is still 73.4MB. Free memory was 53.9MB in the beginning and 51.0MB in the end (delta: 2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.76ms. Allocated memory is still 73.4MB. Free memory was 51.0MB in the beginning and 48.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 410.94ms. Allocated memory is still 73.4MB. Free memory was 48.4MB in the beginning and 53.3MB in the end (delta: -4.9MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. * TraceAbstraction took 772626.61ms. Allocated memory was 73.4MB in the beginning and 629.1MB in the end (delta: 555.7MB). Free memory was 53.0MB in the beginning and 306.3MB in the end (delta: -253.3MB). Peak memory consumption was 303.3MB. Max. memory is 16.1GB. * Witness Printer took 34.96ms. Allocated memory is still 629.1MB. Free memory was 306.3MB in the beginning and 302.6MB in the end (delta: 3.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: 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: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: 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: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: 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, 66 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 772594.13ms, OverallIterations: 103, TraceHistogramMax: 11, EmptinessCheckTime: 203.49ms, AutomataDifference: 239603.04ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 5.80ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16459 SdHoareTripleChecker+Valid, 63808.34ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16445 mSDsluCounter, 14122 SdHoareTripleChecker+Invalid, 53145.36ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 67306 IncrementalHoareTripleChecker+Unchecked, 59426 mSDsCounter, 3114 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 195679 IncrementalHoareTripleChecker+Invalid, 266099 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3114 mSolverCounterUnsat, 574 mSDtfsCounter, 195679 mSolverCounterSat, 437.51ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21056 GetRequests, 12331 SyntacticMatches, 149 SemanticMatches, 8576 ConstructedPredicates, 13 IntricatePredicates, 10 DeprecatedPredicates, 215199 ImplicationChecksByTransitivity, 532094.10ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6966occurred in iteration=102, InterpolantAutomatonStates: 4424, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 2170.64ms AutomataMinimizationTime, 103 MinimizatonAttempts, 23942 StatesRemovedByMinimization, 92 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 969.89ms SsaConstructionTime, 5410.34ms SatisfiabilityAnalysisTime, 499553.55ms InterpolantComputationTime, 15573 NumberOfCodeBlocks, 15448 NumberOfCodeBlocksAsserted, 458 NumberOfCheckSat, 22928 ConstructedInterpolants, 4194 QuantifiedInterpolants, 384743 SizeOfPredicates, 2796 NumberOfNonLiveVariables, 32948 ConjunctsInSsa, 7458 ConjunctsInUnsatCore, 275 InterpolantComputations, 17 PerfectInterpolantSequences, 9722/52107 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 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-30 16:51:39,188 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 [2021-08-30 16:51:39,210 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...