./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext/tree_of_cslls.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 9290e367c892787275a10b4a890113c651652b43 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Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/memsafety-ext/tree_of_cslls.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 9290e367c892787275a10b4a890113c651652b43 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Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 05:36:05,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:36:05,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:36:05,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:36:05,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:36:05,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:36:05,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:36:05,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:36:05,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:36:05,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:36:05,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:36:05,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:36:05,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:36:05,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:36:05,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:36:05,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:36:05,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:36:05,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:36:05,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:36:05,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:36:05,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:36:05,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:36:05,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:36:05,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:36:05,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:36:05,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:36:05,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:36:05,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:36:05,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:36:05,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:36:05,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:36:05,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:36:05,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:36:05,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:36:05,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:36:05,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:36:05,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:36:05,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:36:05,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:36:05,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:36:05,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:36:05,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 05:36:05,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:36:05,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:36:05,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:36:05,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:36:05,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:36:05,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:36:05,754 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:36:05,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:36:05,754 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:36:05,754 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:36:05,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:36:05,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:36:05,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:36:05,755 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:36:05,756 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:36:05,756 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:36:05,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:36:05,756 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:36:05,756 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:36:05,756 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:36:05,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:36:05,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:36:05,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:36:05,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:36:05,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:36:05,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:36:05,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 05:36:05,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 05:36:05,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:36:05,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9290e367c892787275a10b4a890113c651652b43 [2021-08-27 05:36:06,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:36:06,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:36:06,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:36:06,033 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:36:06,033 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:36:06,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i [2021-08-27 05:36:06,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0932c5455/b8ca422e86e946149a9a5d72a3864762/FLAG3babb50e7 [2021-08-27 05:36:06,489 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:36:06,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext/tree_of_cslls.i [2021-08-27 05:36:06,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0932c5455/b8ca422e86e946149a9a5d72a3864762/FLAG3babb50e7 [2021-08-27 05:36:06,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0932c5455/b8ca422e86e946149a9a5d72a3864762 [2021-08-27 05:36:06,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:36:06,515 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:36:06,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:36:06,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:36:06,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:36:06,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:36:06" (1/1) ... [2021-08-27 05:36:06,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547bbe0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06, skipping insertion in model container [2021-08-27 05:36:06,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:36:06" (1/1) ... [2021-08-27 05:36:06,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:36:06,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:36:06,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:36:06,829 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:36:06,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:36:06,901 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:36:06,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06 WrapperNode [2021-08-27 05:36:06,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:36:06,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:36:06,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:36:06,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:36:06,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06" (1/1) ... [2021-08-27 05:36:06,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06" (1/1) ... [2021-08-27 05:36:06,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06" (1/1) ... [2021-08-27 05:36:06,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06" (1/1) ... [2021-08-27 05:36:06,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06" (1/1) ... [2021-08-27 05:36:06,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06" (1/1) ... [2021-08-27 05:36:06,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06" (1/1) ... [2021-08-27 05:36:06,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:36:06,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:36:06,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:36:06,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:36:06,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06" (1/1) ... [2021-08-27 05:36:06,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:36:06,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:36:07,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 05:36:07,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 05:36:07,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:36:07,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:36:07,037 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:36:07,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 05:36:07,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 05:36:07,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 05:36:07,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 05:36:07,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 05:36:07,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:36:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:36:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:36:07,039 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:36:07,039 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 05:36:07,039 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 05:36:07,039 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:36:07,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:36:07,039 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 05:36:07,040 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 05:36:07,040 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 05:36:07,040 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 05:36:07,040 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 05:36:07,040 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 05:36:07,040 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 05:36:07,040 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 05:36:07,041 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 05:36:07,041 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 05:36:07,041 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 05:36:07,041 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 05:36:07,041 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 05:36:07,041 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 05:36:07,041 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 05:36:07,042 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 05:36:07,042 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 05:36:07,042 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 05:36:07,042 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 05:36:07,042 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 05:36:07,042 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 05:36:07,042 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 05:36:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 05:36:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 05:36:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 05:36:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 05:36:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 05:36:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 05:36:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 05:36:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 05:36:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 05:36:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 05:36:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 05:36:07,045 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 05:36:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 05:36:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 05:36:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 05:36:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 05:36:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 05:36:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 05:36:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 05:36:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 05:36:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 05:36:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 05:36:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 05:36:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 05:36:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 05:36:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 05:36:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 05:36:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 05:36:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 05:36:07,049 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 05:36:07,049 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 05:36:07,049 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 05:36:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 05:36:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 05:36:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:36:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 05:36:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:36:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 05:36:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 05:36:07,050 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 05:36:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 05:36:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 05:36:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 05:36:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 05:36:07,051 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 05:36:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 05:36:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 05:36:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 05:36:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 05:36:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 05:36:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 05:36:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 05:36:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 05:36:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 05:36:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 05:36:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 05:36:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 05:36:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 05:36:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 05:36:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 05:36:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 05:36:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 05:36:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 05:36:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 05:36:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 05:36:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 05:36:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 05:36:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 05:36:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 05:36:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 05:36:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 05:36:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 05:36:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 05:36:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 05:36:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 05:36:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 05:36:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 05:36:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 05:36:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 05:36:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 05:36:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 05:36:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 05:36:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 05:36:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 05:36:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:36:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:36:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 05:36:07,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 05:36:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:36:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:36:07,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 05:36:07,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:36:07,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 05:36:07,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 05:36:07,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:36:07,629 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-27 05:36:07,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:36:07 BoogieIcfgContainer [2021-08-27 05:36:07,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:36:07,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:36:07,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:36:07,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:36:07,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:36:06" (1/3) ... [2021-08-27 05:36:07,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7667f24c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:36:07, skipping insertion in model container [2021-08-27 05:36:07,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:36:06" (2/3) ... [2021-08-27 05:36:07,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7667f24c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:36:07, skipping insertion in model container [2021-08-27 05:36:07,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:36:07" (3/3) ... [2021-08-27 05:36:07,636 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_of_cslls.i [2021-08-27 05:36:07,639 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:36:07,639 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 104 error locations. [2021-08-27 05:36:07,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:36:07,669 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 05:36:07,669 INFO L340 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2021-08-27 05:36:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 215 states, 106 states have (on average 2.207547169811321) internal successors, (234), 210 states have internal predecessors, (234), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:36:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 05:36:07,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:07,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:07,691 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:07,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:07,698 INFO L82 PathProgramCache]: Analyzing trace with hash 119924162, now seen corresponding path program 1 times [2021-08-27 05:36:07,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:07,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042726497] [2021-08-27 05:36:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:07,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:07,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:07,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:07,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042726497] [2021-08-27 05:36:07,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042726497] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:07,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:07,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:36:07,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579772391] [2021-08-27 05:36:07,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:36:07,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:07,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:36:07,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:07,922 INFO L87 Difference]: Start difference. First operand has 215 states, 106 states have (on average 2.207547169811321) internal successors, (234), 210 states have internal predecessors, (234), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:08,422 INFO L93 Difference]: Finished difference Result 286 states and 309 transitions. [2021-08-27 05:36:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:36:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-08-27 05:36:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:08,433 INFO L225 Difference]: With dead ends: 286 [2021-08-27 05:36:08,433 INFO L226 Difference]: Without dead ends: 282 [2021-08-27 05:36:08,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-08-27 05:36:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 203. [2021-08-27 05:36:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 105 states have (on average 2.057142857142857) internal successors, (216), 199 states have internal predecessors, (216), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 219 transitions. [2021-08-27 05:36:08,464 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 219 transitions. Word has length 7 [2021-08-27 05:36:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:08,465 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 219 transitions. [2021-08-27 05:36:08,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:08,465 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 219 transitions. [2021-08-27 05:36:08,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 05:36:08,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:08,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:08,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 05:36:08,466 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:08,466 INFO L82 PathProgramCache]: Analyzing trace with hash 119924163, now seen corresponding path program 1 times [2021-08-27 05:36:08,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:08,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003390189] [2021-08-27 05:36:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:08,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:08,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:08,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:08,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003390189] [2021-08-27 05:36:08,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003390189] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:08,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:08,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:36:08,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194199818] [2021-08-27 05:36:08,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:36:08,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:08,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:36:08,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:08,523 INFO L87 Difference]: Start difference. First operand 203 states and 219 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:08,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:08,779 INFO L93 Difference]: Finished difference Result 201 states and 217 transitions. [2021-08-27 05:36:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:36:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-08-27 05:36:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:08,781 INFO L225 Difference]: With dead ends: 201 [2021-08-27 05:36:08,781 INFO L226 Difference]: Without dead ends: 201 [2021-08-27 05:36:08,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:08,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-27 05:36:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-08-27 05:36:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 105 states have (on average 2.038095238095238) internal successors, (214), 197 states have internal predecessors, (214), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2021-08-27 05:36:08,788 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 7 [2021-08-27 05:36:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:08,788 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2021-08-27 05:36:08,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2021-08-27 05:36:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 05:36:08,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:08,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:08,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 05:36:08,789 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash -752090955, now seen corresponding path program 1 times [2021-08-27 05:36:08,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:08,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531714939] [2021-08-27 05:36:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:08,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:08,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:08,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:08,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531714939] [2021-08-27 05:36:08,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531714939] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:08,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:08,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:36:08,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049697025] [2021-08-27 05:36:08,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:36:08,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:08,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:36:08,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:36:08,861 INFO L87 Difference]: Start difference. First operand 201 states and 217 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:09,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:09,242 INFO L93 Difference]: Finished difference Result 358 states and 386 transitions. [2021-08-27 05:36:09,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:36:09,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 10 [2021-08-27 05:36:09,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:09,244 INFO L225 Difference]: With dead ends: 358 [2021-08-27 05:36:09,244 INFO L226 Difference]: Without dead ends: 358 [2021-08-27 05:36:09,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:36:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-08-27 05:36:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 194. [2021-08-27 05:36:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 190 states have internal predecessors, (207), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 210 transitions. [2021-08-27 05:36:09,250 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 210 transitions. Word has length 10 [2021-08-27 05:36:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:09,250 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 210 transitions. [2021-08-27 05:36:09,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 210 transitions. [2021-08-27 05:36:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 05:36:09,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:09,251 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:09,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 05:36:09,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:09,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:09,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1729276408, now seen corresponding path program 1 times [2021-08-27 05:36:09,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:09,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496648847] [2021-08-27 05:36:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:09,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:09,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:09,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:09,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496648847] [2021-08-27 05:36:09,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496648847] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:09,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:09,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:36:09,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463726526] [2021-08-27 05:36:09,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:36:09,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:36:09,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:36:09,308 INFO L87 Difference]: Start difference. First operand 194 states and 210 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:09,619 INFO L93 Difference]: Finished difference Result 193 states and 209 transitions. [2021-08-27 05:36:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:36:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 05:36:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:09,620 INFO L225 Difference]: With dead ends: 193 [2021-08-27 05:36:09,621 INFO L226 Difference]: Without dead ends: 193 [2021-08-27 05:36:09,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:36:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-27 05:36:09,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-08-27 05:36:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 189 states have internal predecessors, (206), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 209 transitions. [2021-08-27 05:36:09,625 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 209 transitions. Word has length 14 [2021-08-27 05:36:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:09,625 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 209 transitions. [2021-08-27 05:36:09,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 209 transitions. [2021-08-27 05:36:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 05:36:09,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:09,626 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:09,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 05:36:09,626 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:09,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:09,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1729276409, now seen corresponding path program 1 times [2021-08-27 05:36:09,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:09,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345272051] [2021-08-27 05:36:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:09,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:09,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:09,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:09,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345272051] [2021-08-27 05:36:09,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345272051] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:09,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:09,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:36:09,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287898490] [2021-08-27 05:36:09,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:36:09,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:09,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:36:09,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:36:09,701 INFO L87 Difference]: Start difference. First operand 193 states and 209 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:10,028 INFO L93 Difference]: Finished difference Result 192 states and 208 transitions. [2021-08-27 05:36:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:36:10,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 05:36:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:10,029 INFO L225 Difference]: With dead ends: 192 [2021-08-27 05:36:10,030 INFO L226 Difference]: Without dead ends: 192 [2021-08-27 05:36:10,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:36:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-27 05:36:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-08-27 05:36:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 105 states have (on average 1.9523809523809523) internal successors, (205), 188 states have internal predecessors, (205), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 208 transitions. [2021-08-27 05:36:10,034 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 208 transitions. Word has length 14 [2021-08-27 05:36:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:10,034 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 208 transitions. [2021-08-27 05:36:10,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 208 transitions. [2021-08-27 05:36:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 05:36:10,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:10,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:10,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 05:36:10,035 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:10,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:10,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1052417110, now seen corresponding path program 1 times [2021-08-27 05:36:10,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:10,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745913235] [2021-08-27 05:36:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:10,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:10,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:10,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:10,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745913235] [2021-08-27 05:36:10,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745913235] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:10,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:10,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 05:36:10,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113852570] [2021-08-27 05:36:10,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 05:36:10,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:10,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 05:36:10,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:36:10,233 INFO L87 Difference]: Start difference. First operand 192 states and 208 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:10,859 INFO L93 Difference]: Finished difference Result 278 states and 308 transitions. [2021-08-27 05:36:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:36:10,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 19 [2021-08-27 05:36:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:10,861 INFO L225 Difference]: With dead ends: 278 [2021-08-27 05:36:10,861 INFO L226 Difference]: Without dead ends: 278 [2021-08-27 05:36:10,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-27 05:36:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-27 05:36:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 196. [2021-08-27 05:36:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 109 states have (on average 1.9357798165137614) internal successors, (211), 192 states have internal predecessors, (211), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 214 transitions. [2021-08-27 05:36:10,865 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 214 transitions. Word has length 19 [2021-08-27 05:36:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:10,865 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 214 transitions. [2021-08-27 05:36:10,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 214 transitions. [2021-08-27 05:36:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 05:36:10,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:10,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:10,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 05:36:10,866 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1052417111, now seen corresponding path program 1 times [2021-08-27 05:36:10,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:10,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905740678] [2021-08-27 05:36:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:10,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:10,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:10,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905740678] [2021-08-27 05:36:10,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905740678] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:10,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:10,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:36:10,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479545745] [2021-08-27 05:36:10,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 05:36:10,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:10,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 05:36:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:36:10,995 INFO L87 Difference]: Start difference. First operand 196 states and 214 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:11,611 INFO L93 Difference]: Finished difference Result 351 states and 387 transitions. [2021-08-27 05:36:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:36:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 19 [2021-08-27 05:36:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:11,613 INFO L225 Difference]: With dead ends: 351 [2021-08-27 05:36:11,613 INFO L226 Difference]: Without dead ends: 351 [2021-08-27 05:36:11,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:36:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-27 05:36:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 196. [2021-08-27 05:36:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 109 states have (on average 1.926605504587156) internal successors, (210), 192 states have internal predecessors, (210), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 213 transitions. [2021-08-27 05:36:11,616 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 213 transitions. Word has length 19 [2021-08-27 05:36:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:11,617 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 213 transitions. [2021-08-27 05:36:11,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 213 transitions. [2021-08-27 05:36:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 05:36:11,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:11,617 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:11,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 05:36:11,618 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:11,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:11,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1734807935, now seen corresponding path program 1 times [2021-08-27 05:36:11,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:11,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291247451] [2021-08-27 05:36:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:11,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:11,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:11,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:11,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291247451] [2021-08-27 05:36:11,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291247451] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:11,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:11,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:36:11,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174172359] [2021-08-27 05:36:11,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:36:11,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:11,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:36:11,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:11,653 INFO L87 Difference]: Start difference. First operand 196 states and 213 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:12,016 INFO L93 Difference]: Finished difference Result 320 states and 352 transitions. [2021-08-27 05:36:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:36:12,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2021-08-27 05:36:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:12,018 INFO L225 Difference]: With dead ends: 320 [2021-08-27 05:36:12,018 INFO L226 Difference]: Without dead ends: 320 [2021-08-27 05:36:12,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:12,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-27 05:36:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 193. [2021-08-27 05:36:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 109 states have (on average 1.8990825688073394) internal successors, (207), 189 states have internal predecessors, (207), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 210 transitions. [2021-08-27 05:36:12,021 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 210 transitions. Word has length 20 [2021-08-27 05:36:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:12,022 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 210 transitions. [2021-08-27 05:36:12,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 210 transitions. [2021-08-27 05:36:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 05:36:12,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:12,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:12,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 05:36:12,023 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:12,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1734807934, now seen corresponding path program 1 times [2021-08-27 05:36:12,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:12,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427276470] [2021-08-27 05:36:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:12,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:12,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:12,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:12,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427276470] [2021-08-27 05:36:12,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427276470] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:12,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:12,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:36:12,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655627484] [2021-08-27 05:36:12,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:36:12,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:12,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:36:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:12,062 INFO L87 Difference]: Start difference. First operand 193 states and 210 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:12,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:12,395 INFO L93 Difference]: Finished difference Result 297 states and 329 transitions. [2021-08-27 05:36:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:36:12,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2021-08-27 05:36:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:12,397 INFO L225 Difference]: With dead ends: 297 [2021-08-27 05:36:12,397 INFO L226 Difference]: Without dead ends: 297 [2021-08-27 05:36:12,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-27 05:36:12,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 191. [2021-08-27 05:36:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 109 states have (on average 1.8807339449541285) internal successors, (205), 187 states have internal predecessors, (205), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 208 transitions. [2021-08-27 05:36:12,400 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 208 transitions. Word has length 20 [2021-08-27 05:36:12,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:12,401 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 208 transitions. [2021-08-27 05:36:12,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 208 transitions. [2021-08-27 05:36:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 05:36:12,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:12,401 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:12,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 05:36:12,402 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:12,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2054357175, now seen corresponding path program 1 times [2021-08-27 05:36:12,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:12,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266561039] [2021-08-27 05:36:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:12,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:12,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:12,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:12,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266561039] [2021-08-27 05:36:12,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266561039] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:12,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:12,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:36:12,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486906866] [2021-08-27 05:36:12,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:36:12,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:36:12,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:36:12,439 INFO L87 Difference]: Start difference. First operand 191 states and 208 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:12,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:12,745 INFO L93 Difference]: Finished difference Result 258 states and 282 transitions. [2021-08-27 05:36:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 05:36:12,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 21 [2021-08-27 05:36:12,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:12,746 INFO L225 Difference]: With dead ends: 258 [2021-08-27 05:36:12,746 INFO L226 Difference]: Without dead ends: 258 [2021-08-27 05:36:12,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:36:12,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-08-27 05:36:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 180. [2021-08-27 05:36:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 113 states have (on average 1.752212389380531) internal successors, (198), 176 states have internal predecessors, (198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 201 transitions. [2021-08-27 05:36:12,750 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 201 transitions. Word has length 21 [2021-08-27 05:36:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:12,750 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 201 transitions. [2021-08-27 05:36:12,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:12,750 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 201 transitions. [2021-08-27 05:36:12,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 05:36:12,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:12,751 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:12,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 05:36:12,751 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:12,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2054357176, now seen corresponding path program 1 times [2021-08-27 05:36:12,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:12,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209136335] [2021-08-27 05:36:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:12,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:12,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:12,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:12,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209136335] [2021-08-27 05:36:12,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209136335] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:12,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:12,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:36:12,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364178668] [2021-08-27 05:36:12,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:36:12,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:12,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:36:12,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:36:12,802 INFO L87 Difference]: Start difference. First operand 180 states and 201 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:13,277 INFO L93 Difference]: Finished difference Result 442 states and 496 transitions. [2021-08-27 05:36:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:36:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 21 [2021-08-27 05:36:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:13,279 INFO L225 Difference]: With dead ends: 442 [2021-08-27 05:36:13,279 INFO L226 Difference]: Without dead ends: 442 [2021-08-27 05:36:13,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:36:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-08-27 05:36:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 322. [2021-08-27 05:36:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 255 states have (on average 1.7568627450980392) internal successors, (448), 318 states have internal predecessors, (448), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 451 transitions. [2021-08-27 05:36:13,284 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 451 transitions. Word has length 21 [2021-08-27 05:36:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:13,285 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 451 transitions. [2021-08-27 05:36:13,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 451 transitions. [2021-08-27 05:36:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 05:36:13,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:13,285 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:13,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 05:36:13,286 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr103ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:13,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1447632801, now seen corresponding path program 1 times [2021-08-27 05:36:13,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:13,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142568721] [2021-08-27 05:36:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:13,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:13,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:13,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:13,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142568721] [2021-08-27 05:36:13,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142568721] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:13,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:13,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:36:13,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546475123] [2021-08-27 05:36:13,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:36:13,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:13,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:36:13,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:13,322 INFO L87 Difference]: Start difference. First operand 322 states and 451 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:13,533 INFO L93 Difference]: Finished difference Result 396 states and 529 transitions. [2021-08-27 05:36:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:36:13,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2021-08-27 05:36:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:13,534 INFO L225 Difference]: With dead ends: 396 [2021-08-27 05:36:13,534 INFO L226 Difference]: Without dead ends: 396 [2021-08-27 05:36:13,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:13,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-27 05:36:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 362. [2021-08-27 05:36:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 295 states have (on average 1.7830508474576272) internal successors, (526), 358 states have internal predecessors, (526), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 529 transitions. [2021-08-27 05:36:13,540 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 529 transitions. Word has length 23 [2021-08-27 05:36:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:13,540 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 529 transitions. [2021-08-27 05:36:13,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 529 transitions. [2021-08-27 05:36:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 05:36:13,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:13,541 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:13,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 05:36:13,541 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr20REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:13,542 INFO L82 PathProgramCache]: Analyzing trace with hash -321692964, now seen corresponding path program 1 times [2021-08-27 05:36:13,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:13,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612532512] [2021-08-27 05:36:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:13,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:13,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:13,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:13,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612532512] [2021-08-27 05:36:13,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612532512] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:13,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:13,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:36:13,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180697228] [2021-08-27 05:36:13,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 05:36:13,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 05:36:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:36:13,629 INFO L87 Difference]: Start difference. First operand 362 states and 529 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:14,300 INFO L93 Difference]: Finished difference Result 819 states and 1198 transitions. [2021-08-27 05:36:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:36:14,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 23 [2021-08-27 05:36:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:14,303 INFO L225 Difference]: With dead ends: 819 [2021-08-27 05:36:14,303 INFO L226 Difference]: Without dead ends: 819 [2021-08-27 05:36:14,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:36:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-08-27 05:36:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 361. [2021-08-27 05:36:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 295 states have (on average 1.7796610169491525) internal successors, (525), 357 states have internal predecessors, (525), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 528 transitions. [2021-08-27 05:36:14,309 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 528 transitions. Word has length 23 [2021-08-27 05:36:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:14,309 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 528 transitions. [2021-08-27 05:36:14,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 528 transitions. [2021-08-27 05:36:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 05:36:14,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:14,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:14,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 05:36:14,310 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr21REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:14,311 INFO L82 PathProgramCache]: Analyzing trace with hash -321692963, now seen corresponding path program 1 times [2021-08-27 05:36:14,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:14,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784238981] [2021-08-27 05:36:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:14,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:14,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:14,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:14,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784238981] [2021-08-27 05:36:14,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784238981] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:14,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:14,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:36:14,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309591055] [2021-08-27 05:36:14,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 05:36:14,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:14,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 05:36:14,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:36:14,399 INFO L87 Difference]: Start difference. First operand 361 states and 528 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:15,308 INFO L93 Difference]: Finished difference Result 818 states and 1197 transitions. [2021-08-27 05:36:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:36:15,309 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 23 [2021-08-27 05:36:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:15,311 INFO L225 Difference]: With dead ends: 818 [2021-08-27 05:36:15,311 INFO L226 Difference]: Without dead ends: 818 [2021-08-27 05:36:15,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:36:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-08-27 05:36:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 360. [2021-08-27 05:36:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 295 states have (on average 1.776271186440678) internal successors, (524), 356 states have internal predecessors, (524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 527 transitions. [2021-08-27 05:36:15,320 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 527 transitions. Word has length 23 [2021-08-27 05:36:15,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:15,320 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 527 transitions. [2021-08-27 05:36:15,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 527 transitions. [2021-08-27 05:36:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 05:36:15,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:15,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:15,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 05:36:15,322 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr70REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -844957138, now seen corresponding path program 1 times [2021-08-27 05:36:15,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:15,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145362805] [2021-08-27 05:36:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:15,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:15,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:15,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:15,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145362805] [2021-08-27 05:36:15,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145362805] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:15,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:15,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:36:15,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620429358] [2021-08-27 05:36:15,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:36:15,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:36:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:15,402 INFO L87 Difference]: Start difference. First operand 360 states and 527 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:15,574 INFO L93 Difference]: Finished difference Result 364 states and 531 transitions. [2021-08-27 05:36:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:36:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2021-08-27 05:36:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:15,576 INFO L225 Difference]: With dead ends: 364 [2021-08-27 05:36:15,576 INFO L226 Difference]: Without dead ends: 364 [2021-08-27 05:36:15,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-27 05:36:15,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2021-08-27 05:36:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 299 states have (on average 1.765886287625418) internal successors, (528), 360 states have internal predecessors, (528), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 531 transitions. [2021-08-27 05:36:15,581 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 531 transitions. Word has length 27 [2021-08-27 05:36:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:15,581 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 531 transitions. [2021-08-27 05:36:15,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 531 transitions. [2021-08-27 05:36:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 05:36:15,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:15,582 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:36:15,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 05:36:15,582 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash 293235340, now seen corresponding path program 1 times [2021-08-27 05:36:15,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:15,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977878988] [2021-08-27 05:36:15,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:15,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:15,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:15,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:15,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977878988] [2021-08-27 05:36:15,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977878988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:36:15,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:36:15,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:36:15,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374987546] [2021-08-27 05:36:15,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:36:15,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:15,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:36:15,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:15,615 INFO L87 Difference]: Start difference. First operand 364 states and 531 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:15,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:15,767 INFO L93 Difference]: Finished difference Result 367 states and 534 transitions. [2021-08-27 05:36:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:36:15,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2021-08-27 05:36:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:15,769 INFO L225 Difference]: With dead ends: 367 [2021-08-27 05:36:15,769 INFO L226 Difference]: Without dead ends: 367 [2021-08-27 05:36:15,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:36:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-08-27 05:36:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2021-08-27 05:36:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 302 states have (on average 1.7582781456953642) internal successors, (531), 363 states have internal predecessors, (531), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 534 transitions. [2021-08-27 05:36:15,775 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 534 transitions. Word has length 28 [2021-08-27 05:36:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:15,775 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 534 transitions. [2021-08-27 05:36:15,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 534 transitions. [2021-08-27 05:36:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 05:36:15,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:15,776 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 05:36:15,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 05:36:15,776 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:15,776 INFO L82 PathProgramCache]: Analyzing trace with hash 745886861, now seen corresponding path program 1 times [2021-08-27 05:36:15,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:15,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614183045] [2021-08-27 05:36:15,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:15,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:16,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:16,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:16,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614183045] [2021-08-27 05:36:16,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614183045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:36:16,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723328138] [2021-08-27 05:36:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:16,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:36:16,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:36:16,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:36:16,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 05:36:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:16,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-27 05:36:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:36:16,255 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:36:16,287 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:36:16,287 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 11 treesize of output 11 [2021-08-27 05:36:16,314 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 18 treesize of output 14 [2021-08-27 05:36:16,396 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:36:16,397 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 1 case distinctions, treesize of input 34 treesize of output 24 [2021-08-27 05:36:16,425 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:36:16,425 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 11 treesize of output 11 [2021-08-27 05:36:16,462 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 22 treesize of output 21 [2021-08-27 05:36:16,515 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:36:16,515 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 1 case distinctions, treesize of input 49 treesize of output 33 [2021-08-27 05:36:16,586 INFO L354 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2021-08-27 05:36:16,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2021-08-27 05:36:16,640 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 05:36:16,641 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 29 [2021-08-27 05:36:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:16,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723328138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:36:16,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:36:16,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-08-27 05:36:16,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300496579] [2021-08-27 05:36:16,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 05:36:16,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:16,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 05:36:16,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-08-27 05:36:16,669 INFO L87 Difference]: Start difference. First operand 367 states and 534 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:36:42,263 INFO L93 Difference]: Finished difference Result 708 states and 1004 transitions. [2021-08-27 05:36:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 05:36:42,263 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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 28 [2021-08-27 05:36:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:36:42,266 INFO L225 Difference]: With dead ends: 708 [2021-08-27 05:36:42,266 INFO L226 Difference]: Without dead ends: 708 [2021-08-27 05:36:42,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 05:36:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-08-27 05:36:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 366. [2021-08-27 05:36:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 302 states have (on average 1.7549668874172186) internal successors, (530), 362 states have internal predecessors, (530), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 533 transitions. [2021-08-27 05:36:42,272 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 533 transitions. Word has length 28 [2021-08-27 05:36:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:36:42,272 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 533 transitions. [2021-08-27 05:36:42,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:36:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 533 transitions. [2021-08-27 05:36:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 05:36:42,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:36:42,275 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 05:36:42,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 05:36:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-27 05:36:42,475 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:36:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:36:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash 745886862, now seen corresponding path program 1 times [2021-08-27 05:36:42,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:36:42,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114372709] [2021-08-27 05:36:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:42,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:36:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:42,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:36:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:42,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:36:42,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114372709] [2021-08-27 05:36:42,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114372709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:36:42,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310583651] [2021-08-27 05:36:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:36:42,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:36:42,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:36:42,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:36:42,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 05:36:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:36:43,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 05:36:43,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:36:43,036 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:36:43,071 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 05:36:43,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 05:36:43,108 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 13 treesize of output 9 [2021-08-27 05:36:43,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 05:36:43,214 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:36:43,215 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 1 case distinctions, treesize of input 77 treesize of output 49 [2021-08-27 05:36:43,224 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:36:43,225 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 54 treesize of output 47 [2021-08-27 05:36:43,275 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-08-27 05:36:43,276 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 22 treesize of output 24 [2021-08-27 05:36:43,399 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 21 treesize of output 20 [2021-08-27 05:36:43,405 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 54 treesize of output 35 [2021-08-27 05:36:43,503 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:36:43,503 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 1 case distinctions, treesize of input 102 treesize of output 62 [2021-08-27 05:36:43,513 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:36:43,514 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 99 treesize of output 92 [2021-08-27 05:36:43,619 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-08-27 05:36:43,620 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 1 case distinctions, treesize of input 34 treesize of output 34 [2021-08-27 05:36:43,628 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-08-27 05:36:43,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 05:36:43,686 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 98 treesize of output 86 [2021-08-27 05:36:43,691 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 05:36:43,691 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 36 [2021-08-27 05:36:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:36:43,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310583651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:36:43,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:36:43,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-08-27 05:36:43,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028942482] [2021-08-27 05:36:43,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 05:36:43,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:36:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 05:36:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-08-27 05:36:43,726 INFO L87 Difference]: Start difference. First operand 366 states and 533 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:00,155 INFO L93 Difference]: Finished difference Result 810 states and 1138 transitions. [2021-08-27 05:37:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 05:37:00,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 28 [2021-08-27 05:37:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:00,157 INFO L225 Difference]: With dead ends: 810 [2021-08-27 05:37:00,157 INFO L226 Difference]: Without dead ends: 810 [2021-08-27 05:37:00,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 866.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 05:37:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-08-27 05:37:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 361. [2021-08-27 05:37:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 298 states have (on average 1.7583892617449663) internal successors, (524), 357 states have internal predecessors, (524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 527 transitions. [2021-08-27 05:37:00,163 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 527 transitions. Word has length 28 [2021-08-27 05:37:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:00,163 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 527 transitions. [2021-08-27 05:37:00,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 527 transitions. [2021-08-27 05:37:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-27 05:37:00,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:00,163 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:00,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 05:37:00,364 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,SelfDestructingSolverStorable17 [2021-08-27 05:37:00,364 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr70REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:00,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:00,364 INFO L82 PathProgramCache]: Analyzing trace with hash -205078551, now seen corresponding path program 1 times [2021-08-27 05:37:00,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:00,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857994850] [2021-08-27 05:37:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:00,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:00,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:00,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:00,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857994850] [2021-08-27 05:37:00,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857994850] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:00,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:00,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:37:00,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066568724] [2021-08-27 05:37:00,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:37:00,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:00,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:37:00,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:37:00,443 INFO L87 Difference]: Start difference. First operand 361 states and 527 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:00,656 INFO L93 Difference]: Finished difference Result 404 states and 556 transitions. [2021-08-27 05:37:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:37:00,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2021-08-27 05:37:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:00,658 INFO L225 Difference]: With dead ends: 404 [2021-08-27 05:37:00,658 INFO L226 Difference]: Without dead ends: 404 [2021-08-27 05:37:00,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:37:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-27 05:37:00,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 350. [2021-08-27 05:37:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 287 states have (on average 1.7421602787456445) internal successors, (500), 346 states have internal predecessors, (500), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 503 transitions. [2021-08-27 05:37:00,663 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 503 transitions. Word has length 29 [2021-08-27 05:37:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:00,663 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 503 transitions. [2021-08-27 05:37:00,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 503 transitions. [2021-08-27 05:37:00,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 05:37:00,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:00,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:00,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-27 05:37:00,664 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:00,665 INFO L82 PathProgramCache]: Analyzing trace with hash 721841863, now seen corresponding path program 1 times [2021-08-27 05:37:00,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:00,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414509065] [2021-08-27 05:37:00,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:00,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:00,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:00,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:00,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414509065] [2021-08-27 05:37:00,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414509065] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:00,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:00,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 05:37:00,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959917557] [2021-08-27 05:37:00,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 05:37:00,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:00,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 05:37:00,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:37:00,803 INFO L87 Difference]: Start difference. First operand 350 states and 503 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:01,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:01,564 INFO L93 Difference]: Finished difference Result 613 states and 800 transitions. [2021-08-27 05:37:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 05:37:01,565 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 30 [2021-08-27 05:37:01,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:01,566 INFO L225 Difference]: With dead ends: 613 [2021-08-27 05:37:01,566 INFO L226 Difference]: Without dead ends: 613 [2021-08-27 05:37:01,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-27 05:37:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-27 05:37:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 437. [2021-08-27 05:37:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 374 states have (on average 1.7165775401069518) internal successors, (642), 433 states have internal predecessors, (642), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 645 transitions. [2021-08-27 05:37:01,572 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 645 transitions. Word has length 30 [2021-08-27 05:37:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:01,572 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 645 transitions. [2021-08-27 05:37:01,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 645 transitions. [2021-08-27 05:37:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 05:37:01,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:01,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:01,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-27 05:37:01,573 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:01,573 INFO L82 PathProgramCache]: Analyzing trace with hash 722026561, now seen corresponding path program 1 times [2021-08-27 05:37:01,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:01,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253508240] [2021-08-27 05:37:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:01,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:01,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:01,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:01,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253508240] [2021-08-27 05:37:01,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253508240] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:01,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:01,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 05:37:01,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221770929] [2021-08-27 05:37:01,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:37:01,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:37:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:37:01,655 INFO L87 Difference]: Start difference. First operand 437 states and 645 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:01,963 INFO L93 Difference]: Finished difference Result 460 states and 673 transitions. [2021-08-27 05:37:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:37:01,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 30 [2021-08-27 05:37:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:01,965 INFO L225 Difference]: With dead ends: 460 [2021-08-27 05:37:01,965 INFO L226 Difference]: Without dead ends: 457 [2021-08-27 05:37:01,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:37:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-08-27 05:37:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 446. [2021-08-27 05:37:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 383 states have (on average 1.7075718015665797) internal successors, (654), 442 states have internal predecessors, (654), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 657 transitions. [2021-08-27 05:37:01,971 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 657 transitions. Word has length 30 [2021-08-27 05:37:01,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:01,971 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 657 transitions. [2021-08-27 05:37:01,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 657 transitions. [2021-08-27 05:37:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 05:37:01,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:01,971 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:01,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-27 05:37:01,972 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:01,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:01,972 INFO L82 PathProgramCache]: Analyzing trace with hash -731956209, now seen corresponding path program 1 times [2021-08-27 05:37:01,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:01,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947962040] [2021-08-27 05:37:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:01,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:02,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:02,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:02,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947962040] [2021-08-27 05:37:02,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947962040] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:02,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:02,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 05:37:02,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130791870] [2021-08-27 05:37:02,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 05:37:02,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:02,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 05:37:02,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:37:02,146 INFO L87 Difference]: Start difference. First operand 446 states and 657 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:02,833 INFO L93 Difference]: Finished difference Result 583 states and 763 transitions. [2021-08-27 05:37:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 05:37:02,834 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 30 [2021-08-27 05:37:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:02,835 INFO L225 Difference]: With dead ends: 583 [2021-08-27 05:37:02,835 INFO L226 Difference]: Without dead ends: 583 [2021-08-27 05:37:02,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-08-27 05:37:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-08-27 05:37:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 419. [2021-08-27 05:37:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 356 states have (on average 1.7134831460674158) internal successors, (610), 415 states have internal predecessors, (610), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 613 transitions. [2021-08-27 05:37:02,840 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 613 transitions. Word has length 30 [2021-08-27 05:37:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:02,841 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 613 transitions. [2021-08-27 05:37:02,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 613 transitions. [2021-08-27 05:37:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 05:37:02,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:02,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:02,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-27 05:37:02,841 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr80REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash 488542928, now seen corresponding path program 1 times [2021-08-27 05:37:02,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:02,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034795224] [2021-08-27 05:37:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:02,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:02,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:02,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:02,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034795224] [2021-08-27 05:37:02,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034795224] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:02,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:02,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 05:37:02,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903792128] [2021-08-27 05:37:02,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 05:37:02,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:02,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 05:37:02,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:37:02,954 INFO L87 Difference]: Start difference. First operand 419 states and 613 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:03,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:03,627 INFO L93 Difference]: Finished difference Result 629 states and 891 transitions. [2021-08-27 05:37:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 05:37:03,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 31 [2021-08-27 05:37:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:03,629 INFO L225 Difference]: With dead ends: 629 [2021-08-27 05:37:03,629 INFO L226 Difference]: Without dead ends: 629 [2021-08-27 05:37:03,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-08-27 05:37:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-08-27 05:37:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 428. [2021-08-27 05:37:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 365 states have (on average 1.7013698630136986) internal successors, (621), 424 states have internal predecessors, (621), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 624 transitions. [2021-08-27 05:37:03,634 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 624 transitions. Word has length 31 [2021-08-27 05:37:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:03,634 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 624 transitions. [2021-08-27 05:37:03,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 624 transitions. [2021-08-27 05:37:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 05:37:03,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:03,635 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:03,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-27 05:37:03,635 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr81REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:03,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:03,635 INFO L82 PathProgramCache]: Analyzing trace with hash 488542929, now seen corresponding path program 1 times [2021-08-27 05:37:03,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:03,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113329221] [2021-08-27 05:37:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:03,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:03,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:03,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:03,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113329221] [2021-08-27 05:37:03,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113329221] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:03,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:03,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 05:37:03,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229742494] [2021-08-27 05:37:03,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 05:37:03,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 05:37:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:37:03,774 INFO L87 Difference]: Start difference. First operand 428 states and 624 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:04,532 INFO L93 Difference]: Finished difference Result 632 states and 894 transitions. [2021-08-27 05:37:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:37:04,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 31 [2021-08-27 05:37:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:04,537 INFO L225 Difference]: With dead ends: 632 [2021-08-27 05:37:04,537 INFO L226 Difference]: Without dead ends: 632 [2021-08-27 05:37:04,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-27 05:37:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-08-27 05:37:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 428. [2021-08-27 05:37:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 365 states have (on average 1.6986301369863013) internal successors, (620), 424 states have internal predecessors, (620), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 623 transitions. [2021-08-27 05:37:04,543 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 623 transitions. Word has length 31 [2021-08-27 05:37:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:04,543 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 623 transitions. [2021-08-27 05:37:04,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 623 transitions. [2021-08-27 05:37:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 05:37:04,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:04,544 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:04,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-27 05:37:04,544 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1492203285, now seen corresponding path program 1 times [2021-08-27 05:37:04,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:04,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343517593] [2021-08-27 05:37:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:04,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:04,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:04,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:04,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343517593] [2021-08-27 05:37:04,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343517593] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:04,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:04,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:37:04,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765183938] [2021-08-27 05:37:04,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:37:04,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:37:04,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:37:04,579 INFO L87 Difference]: Start difference. First operand 428 states and 623 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:04,900 INFO L93 Difference]: Finished difference Result 636 states and 932 transitions. [2021-08-27 05:37:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:37:04,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2021-08-27 05:37:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:04,902 INFO L225 Difference]: With dead ends: 636 [2021-08-27 05:37:04,903 INFO L226 Difference]: Without dead ends: 636 [2021-08-27 05:37:04,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:37:04,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-27 05:37:04,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 423. [2021-08-27 05:37:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 365 states have (on average 1.6849315068493151) internal successors, (615), 419 states have internal predecessors, (615), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 618 transitions. [2021-08-27 05:37:04,908 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 618 transitions. Word has length 31 [2021-08-27 05:37:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:04,908 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 618 transitions. [2021-08-27 05:37:04,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 618 transitions. [2021-08-27 05:37:04,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 05:37:04,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:04,909 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:04,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-27 05:37:04,909 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr39REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:04,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:04,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1492203286, now seen corresponding path program 1 times [2021-08-27 05:37:04,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:04,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063276329] [2021-08-27 05:37:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:04,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:04,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:04,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:04,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063276329] [2021-08-27 05:37:04,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063276329] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:04,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:04,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:37:04,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107020118] [2021-08-27 05:37:04,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:37:04,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:37:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:37:04,949 INFO L87 Difference]: Start difference. First operand 423 states and 618 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:05,157 INFO L93 Difference]: Finished difference Result 421 states and 616 transitions. [2021-08-27 05:37:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:37:05,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2021-08-27 05:37:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:05,159 INFO L225 Difference]: With dead ends: 421 [2021-08-27 05:37:05,159 INFO L226 Difference]: Without dead ends: 421 [2021-08-27 05:37:05,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:37:05,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-08-27 05:37:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2021-08-27 05:37:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 365 states have (on average 1.6794520547945206) internal successors, (613), 417 states have internal predecessors, (613), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 616 transitions. [2021-08-27 05:37:05,164 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 616 transitions. Word has length 31 [2021-08-27 05:37:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:05,164 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 616 transitions. [2021-08-27 05:37:05,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 616 transitions. [2021-08-27 05:37:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 05:37:05,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:05,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:05,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-27 05:37:05,165 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:05,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:05,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2014815066, now seen corresponding path program 1 times [2021-08-27 05:37:05,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:05,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549615191] [2021-08-27 05:37:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:05,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:05,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:05,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:05,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549615191] [2021-08-27 05:37:05,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549615191] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:05,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:05,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 05:37:05,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425444703] [2021-08-27 05:37:05,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 05:37:05,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 05:37:05,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:37:05,372 INFO L87 Difference]: Start difference. First operand 421 states and 616 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:06,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:06,232 INFO L93 Difference]: Finished difference Result 547 states and 761 transitions. [2021-08-27 05:37:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 05:37:06,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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 32 [2021-08-27 05:37:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:06,234 INFO L225 Difference]: With dead ends: 547 [2021-08-27 05:37:06,234 INFO L226 Difference]: Without dead ends: 547 [2021-08-27 05:37:06,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-08-27 05:37:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-08-27 05:37:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 380. [2021-08-27 05:37:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 324 states have (on average 1.6635802469135803) internal successors, (539), 376 states have internal predecessors, (539), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 542 transitions. [2021-08-27 05:37:06,238 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 542 transitions. Word has length 32 [2021-08-27 05:37:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:06,238 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 542 transitions. [2021-08-27 05:37:06,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 542 transitions. [2021-08-27 05:37:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-27 05:37:06,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:06,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:06,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-27 05:37:06,239 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr97ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:06,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1461535014, now seen corresponding path program 1 times [2021-08-27 05:37:06,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:06,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867698849] [2021-08-27 05:37:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:06,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:06,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:06,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:06,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867698849] [2021-08-27 05:37:06,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867698849] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:06,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:06,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 05:37:06,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594844748] [2021-08-27 05:37:06,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 05:37:06,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 05:37:06,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:37:06,364 INFO L87 Difference]: Start difference. First operand 380 states and 542 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:07,029 INFO L93 Difference]: Finished difference Result 546 states and 760 transitions. [2021-08-27 05:37:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 05:37:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 34 [2021-08-27 05:37:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:07,031 INFO L225 Difference]: With dead ends: 546 [2021-08-27 05:37:07,031 INFO L226 Difference]: Without dead ends: 546 [2021-08-27 05:37:07,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-27 05:37:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-08-27 05:37:07,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 383. [2021-08-27 05:37:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 327 states have (on average 1.6605504587155964) internal successors, (543), 379 states have internal predecessors, (543), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 546 transitions. [2021-08-27 05:37:07,035 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 546 transitions. Word has length 34 [2021-08-27 05:37:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:07,035 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 546 transitions. [2021-08-27 05:37:07,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 546 transitions. [2021-08-27 05:37:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-27 05:37:07,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:07,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:07,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-27 05:37:07,035 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr84REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:07,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:07,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1461533923, now seen corresponding path program 1 times [2021-08-27 05:37:07,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:07,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512499707] [2021-08-27 05:37:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:07,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:07,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:07,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:07,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512499707] [2021-08-27 05:37:07,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512499707] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:07,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:07,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:37:07,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096478394] [2021-08-27 05:37:07,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:37:07,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:37:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:37:07,080 INFO L87 Difference]: Start difference. First operand 383 states and 546 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:07,398 INFO L93 Difference]: Finished difference Result 382 states and 542 transitions. [2021-08-27 05:37:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:37:07,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 34 [2021-08-27 05:37:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:07,399 INFO L225 Difference]: With dead ends: 382 [2021-08-27 05:37:07,399 INFO L226 Difference]: Without dead ends: 382 [2021-08-27 05:37:07,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:37:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-08-27 05:37:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2021-08-27 05:37:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 327 states have (on average 1.6483180428134556) internal successors, (539), 378 states have internal predecessors, (539), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 542 transitions. [2021-08-27 05:37:07,403 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 542 transitions. Word has length 34 [2021-08-27 05:37:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:07,404 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 542 transitions. [2021-08-27 05:37:07,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 542 transitions. [2021-08-27 05:37:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-27 05:37:07,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:07,404 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:07,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-27 05:37:07,405 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr85REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1461533922, now seen corresponding path program 1 times [2021-08-27 05:37:07,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:07,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472664098] [2021-08-27 05:37:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:07,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:07,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:07,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:07,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472664098] [2021-08-27 05:37:07,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472664098] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:07,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:07,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:37:07,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670911503] [2021-08-27 05:37:07,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:37:07,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:07,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:37:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:37:07,460 INFO L87 Difference]: Start difference. First operand 382 states and 542 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:07,784 INFO L93 Difference]: Finished difference Result 381 states and 538 transitions. [2021-08-27 05:37:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:37:07,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 34 [2021-08-27 05:37:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:07,786 INFO L225 Difference]: With dead ends: 381 [2021-08-27 05:37:07,786 INFO L226 Difference]: Without dead ends: 381 [2021-08-27 05:37:07,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:37:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-08-27 05:37:07,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2021-08-27 05:37:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 327 states have (on average 1.636085626911315) internal successors, (535), 377 states have internal predecessors, (535), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 538 transitions. [2021-08-27 05:37:07,790 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 538 transitions. Word has length 34 [2021-08-27 05:37:07,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:07,790 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 538 transitions. [2021-08-27 05:37:07,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 538 transitions. [2021-08-27 05:37:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-27 05:37:07,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:07,790 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:07,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-27 05:37:07,790 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr43REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:07,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1316676044, now seen corresponding path program 1 times [2021-08-27 05:37:07,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:07,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715273692] [2021-08-27 05:37:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:07,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:07,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:07,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:07,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715273692] [2021-08-27 05:37:07,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715273692] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:07,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:07,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:37:07,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739045515] [2021-08-27 05:37:07,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:37:07,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:37:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:37:07,841 INFO L87 Difference]: Start difference. First operand 381 states and 538 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:08,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:08,254 INFO L93 Difference]: Finished difference Result 800 states and 1167 transitions. [2021-08-27 05:37:08,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:37:08,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 34 [2021-08-27 05:37:08,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:08,256 INFO L225 Difference]: With dead ends: 800 [2021-08-27 05:37:08,257 INFO L226 Difference]: Without dead ends: 800 [2021-08-27 05:37:08,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:37:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-08-27 05:37:08,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 378. [2021-08-27 05:37:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 327 states have (on average 1.6269113149847094) internal successors, (532), 374 states have internal predecessors, (532), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:08,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 535 transitions. [2021-08-27 05:37:08,262 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 535 transitions. Word has length 34 [2021-08-27 05:37:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:08,262 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 535 transitions. [2021-08-27 05:37:08,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 535 transitions. [2021-08-27 05:37:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 05:37:08,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:08,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:08,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-27 05:37:08,263 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr98ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1937055181, now seen corresponding path program 1 times [2021-08-27 05:37:08,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:08,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759941072] [2021-08-27 05:37:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:08,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:08,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:08,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:08,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759941072] [2021-08-27 05:37:08,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759941072] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:08,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:08,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 05:37:08,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912646148] [2021-08-27 05:37:08,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 05:37:08,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:08,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 05:37:08,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:37:08,368 INFO L87 Difference]: Start difference. First operand 378 states and 535 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:09,035 INFO L93 Difference]: Finished difference Result 532 states and 738 transitions. [2021-08-27 05:37:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 05:37:09,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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 35 [2021-08-27 05:37:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:09,036 INFO L225 Difference]: With dead ends: 532 [2021-08-27 05:37:09,036 INFO L226 Difference]: Without dead ends: 532 [2021-08-27 05:37:09,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-27 05:37:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-27 05:37:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 379. [2021-08-27 05:37:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 328 states have (on average 1.625) internal successors, (533), 375 states have internal predecessors, (533), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 536 transitions. [2021-08-27 05:37:09,040 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 536 transitions. Word has length 35 [2021-08-27 05:37:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:09,041 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 536 transitions. [2021-08-27 05:37:09,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 536 transitions. [2021-08-27 05:37:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 05:37:09,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:09,041 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:09,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-27 05:37:09,041 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr99ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash -80831172, now seen corresponding path program 1 times [2021-08-27 05:37:09,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:09,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102713772] [2021-08-27 05:37:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:09,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:09,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:09,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:09,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102713772] [2021-08-27 05:37:09,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102713772] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:09,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:09,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:37:09,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000503156] [2021-08-27 05:37:09,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:37:09,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:09,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:37:09,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:37:09,086 INFO L87 Difference]: Start difference. First operand 379 states and 536 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:09,397 INFO L93 Difference]: Finished difference Result 378 states and 532 transitions. [2021-08-27 05:37:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:37:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 36 [2021-08-27 05:37:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:09,398 INFO L225 Difference]: With dead ends: 378 [2021-08-27 05:37:09,398 INFO L226 Difference]: Without dead ends: 378 [2021-08-27 05:37:09,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:37:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-08-27 05:37:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-08-27 05:37:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 328 states have (on average 1.6128048780487805) internal successors, (529), 374 states have internal predecessors, (529), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 532 transitions. [2021-08-27 05:37:09,402 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 532 transitions. Word has length 36 [2021-08-27 05:37:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:09,402 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 532 transitions. [2021-08-27 05:37:09,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 532 transitions. [2021-08-27 05:37:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 05:37:09,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:09,403 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:09,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-27 05:37:09,403 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr88REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1821617879, now seen corresponding path program 1 times [2021-08-27 05:37:09,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:09,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988521865] [2021-08-27 05:37:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:09,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:09,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:09,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:09,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988521865] [2021-08-27 05:37:09,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988521865] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:09,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:09,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 05:37:09,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850958206] [2021-08-27 05:37:09,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 05:37:09,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:09,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 05:37:09,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:37:09,559 INFO L87 Difference]: Start difference. First operand 378 states and 532 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:10,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:10,322 INFO L93 Difference]: Finished difference Result 518 states and 719 transitions. [2021-08-27 05:37:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 05:37:10,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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 37 [2021-08-27 05:37:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:10,324 INFO L225 Difference]: With dead ends: 518 [2021-08-27 05:37:10,324 INFO L226 Difference]: Without dead ends: 518 [2021-08-27 05:37:10,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-08-27 05:37:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-27 05:37:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 378. [2021-08-27 05:37:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 328 states have (on average 1.6097560975609757) internal successors, (528), 374 states have internal predecessors, (528), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 531 transitions. [2021-08-27 05:37:10,328 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 531 transitions. Word has length 37 [2021-08-27 05:37:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:10,328 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 531 transitions. [2021-08-27 05:37:10,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 531 transitions. [2021-08-27 05:37:10,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 05:37:10,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:10,329 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:10,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-27 05:37:10,329 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr101ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:10,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:10,329 INFO L82 PathProgramCache]: Analyzing trace with hash -369333346, now seen corresponding path program 1 times [2021-08-27 05:37:10,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:10,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066722627] [2021-08-27 05:37:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:10,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:10,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:10,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066722627] [2021-08-27 05:37:10,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066722627] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:10,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:10,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:37:10,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947225774] [2021-08-27 05:37:10,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:37:10,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:37:10,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:37:10,374 INFO L87 Difference]: Start difference. First operand 378 states and 531 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:10,679 INFO L93 Difference]: Finished difference Result 534 states and 668 transitions. [2021-08-27 05:37:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 05:37:10,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 38 [2021-08-27 05:37:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:10,680 INFO L225 Difference]: With dead ends: 534 [2021-08-27 05:37:10,681 INFO L226 Difference]: Without dead ends: 534 [2021-08-27 05:37:10,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:37:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-27 05:37:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 400. [2021-08-27 05:37:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 350 states have (on average 1.6257142857142857) internal successors, (569), 396 states have internal predecessors, (569), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 572 transitions. [2021-08-27 05:37:10,685 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 572 transitions. Word has length 38 [2021-08-27 05:37:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:10,685 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 572 transitions. [2021-08-27 05:37:10,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 572 transitions. [2021-08-27 05:37:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 05:37:10,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:10,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:10,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-27 05:37:10,686 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:10,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:10,686 INFO L82 PathProgramCache]: Analyzing trace with hash -275908081, now seen corresponding path program 1 times [2021-08-27 05:37:10,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:10,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642612316] [2021-08-27 05:37:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:10,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:10,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:10,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:10,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642612316] [2021-08-27 05:37:10,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642612316] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:10,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:10,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:37:10,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864197738] [2021-08-27 05:37:10,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:37:10,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:37:10,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:37:10,734 INFO L87 Difference]: Start difference. First operand 400 states and 572 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:10,967 INFO L93 Difference]: Finished difference Result 399 states and 571 transitions. [2021-08-27 05:37:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:37:10,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 38 [2021-08-27 05:37:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:10,969 INFO L225 Difference]: With dead ends: 399 [2021-08-27 05:37:10,969 INFO L226 Difference]: Without dead ends: 399 [2021-08-27 05:37:10,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:37:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-08-27 05:37:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2021-08-27 05:37:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 350 states have (on average 1.6228571428571428) internal successors, (568), 395 states have internal predecessors, (568), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 571 transitions. [2021-08-27 05:37:10,973 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 571 transitions. Word has length 38 [2021-08-27 05:37:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:10,973 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 571 transitions. [2021-08-27 05:37:10,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 571 transitions. [2021-08-27 05:37:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 05:37:10,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:10,974 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:10,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-27 05:37:10,974 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash -275908080, now seen corresponding path program 1 times [2021-08-27 05:37:10,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:10,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014732587] [2021-08-27 05:37:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:10,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:11,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:11,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:11,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014732587] [2021-08-27 05:37:11,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014732587] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:11,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:11,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:37:11,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234959591] [2021-08-27 05:37:11,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:37:11,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:11,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:37:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:37:11,035 INFO L87 Difference]: Start difference. First operand 399 states and 571 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:11,286 INFO L93 Difference]: Finished difference Result 398 states and 570 transitions. [2021-08-27 05:37:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:37:11,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 38 [2021-08-27 05:37:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:11,288 INFO L225 Difference]: With dead ends: 398 [2021-08-27 05:37:11,288 INFO L226 Difference]: Without dead ends: 398 [2021-08-27 05:37:11,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:37:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-08-27 05:37:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-08-27 05:37:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 350 states have (on average 1.62) internal successors, (567), 394 states have internal predecessors, (567), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 570 transitions. [2021-08-27 05:37:11,292 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 570 transitions. Word has length 38 [2021-08-27 05:37:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:11,292 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 570 transitions. [2021-08-27 05:37:11,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 570 transitions. [2021-08-27 05:37:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 05:37:11,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:11,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:11,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-27 05:37:11,293 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr102ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:11,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1435568529, now seen corresponding path program 1 times [2021-08-27 05:37:11,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:11,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415975000] [2021-08-27 05:37:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:11,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:11,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:11,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:11,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415975000] [2021-08-27 05:37:11,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415975000] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:37:11,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:37:11,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-08-27 05:37:11,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807586326] [2021-08-27 05:37:11,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 05:37:11,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:11,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 05:37:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-27 05:37:11,570 INFO L87 Difference]: Start difference. First operand 398 states and 570 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:12,720 INFO L93 Difference]: Finished difference Result 701 states and 910 transitions. [2021-08-27 05:37:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 05:37:12,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 39 [2021-08-27 05:37:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:12,722 INFO L225 Difference]: With dead ends: 701 [2021-08-27 05:37:12,722 INFO L226 Difference]: Without dead ends: 701 [2021-08-27 05:37:12,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 537.6ms TimeCoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 05:37:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-08-27 05:37:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 426. [2021-08-27 05:37:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 378 states have (on average 1.6164021164021165) internal successors, (611), 422 states have internal predecessors, (611), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 614 transitions. [2021-08-27 05:37:12,727 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 614 transitions. Word has length 39 [2021-08-27 05:37:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:12,727 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 614 transitions. [2021-08-27 05:37:12,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 614 transitions. [2021-08-27 05:37:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 05:37:12,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:12,728 INFO L512 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, 1, 1, 1, 1, 1] [2021-08-27 05:37:12,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-27 05:37:12,728 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:12,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1693237712, now seen corresponding path program 1 times [2021-08-27 05:37:12,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:12,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317469188] [2021-08-27 05:37:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:12,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:13,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:13,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:13,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317469188] [2021-08-27 05:37:13,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317469188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:37:13,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399272696] [2021-08-27 05:37:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:13,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:37:13,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:37:13,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:37:13,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 05:37:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:13,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-27 05:37:13,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:37:13,269 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:37:13,304 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 11 treesize of output 7 [2021-08-27 05:37:13,310 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 11 treesize of output 7 [2021-08-27 05:37:13,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-08-27 05:37:13,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,383 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 21 treesize of output 20 [2021-08-27 05:37:13,428 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:37:13,429 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 11 treesize of output 11 [2021-08-27 05:37:13,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-08-27 05:37:13,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-27 05:37:13,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,688 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-08-27 05:37:13,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 82 [2021-08-27 05:37:13,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,714 INFO L354 Elim1Store]: treesize reduction 120, result has 17.8 percent of original size [2021-08-27 05:37:13,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 74 [2021-08-27 05:37:13,801 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:37:13,801 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 11 treesize of output 11 [2021-08-27 05:37:13,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:13,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-08-27 05:37:14,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-08-27 05:37:14,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,155 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-08-27 05:37:14,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 91 [2021-08-27 05:37:14,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,181 INFO L354 Elim1Store]: treesize reduction 120, result has 17.8 percent of original size [2021-08-27 05:37:14,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 99 [2021-08-27 05:37:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:14,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 13 [2021-08-27 05:37:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:14,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399272696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:37:14,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:37:14,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-27 05:37:14,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971189734] [2021-08-27 05:37:14,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 05:37:14,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:14,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 05:37:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-08-27 05:37:14,687 INFO L87 Difference]: Start difference. First operand 426 states and 614 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:23,363 INFO L93 Difference]: Finished difference Result 822 states and 1089 transitions. [2021-08-27 05:37:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 05:37:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 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 39 [2021-08-27 05:37:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:23,366 INFO L225 Difference]: With dead ends: 822 [2021-08-27 05:37:23,366 INFO L226 Difference]: Without dead ends: 822 [2021-08-27 05:37:23,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1394.2ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 05:37:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-08-27 05:37:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 518. [2021-08-27 05:37:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 470 states have (on average 1.6127659574468085) internal successors, (758), 514 states have internal predecessors, (758), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 761 transitions. [2021-08-27 05:37:23,372 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 761 transitions. Word has length 39 [2021-08-27 05:37:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:23,372 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 761 transitions. [2021-08-27 05:37:23,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 761 transitions. [2021-08-27 05:37:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 05:37:23,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:23,373 INFO L512 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, 1, 1, 1, 1, 1] [2021-08-27 05:37:23,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 05:37:23,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:37:23,593 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1147931512, now seen corresponding path program 1 times [2021-08-27 05:37:23,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:23,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002117797] [2021-08-27 05:37:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:23,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:23,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:23,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:23,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002117797] [2021-08-27 05:37:23,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002117797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:37:23,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319251095] [2021-08-27 05:37:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:23,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:37:23,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:37:23,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:37:23,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 05:37:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:24,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 05:37:24,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:37:24,307 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:37:24,342 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 13 treesize of output 9 [2021-08-27 05:37:24,346 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 13 treesize of output 9 [2021-08-27 05:37:24,387 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:37:24,387 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 11 treesize of output 11 [2021-08-27 05:37:24,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:24,434 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 27 treesize of output 26 [2021-08-27 05:37:24,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:24,440 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 23 treesize of output 22 [2021-08-27 05:37:24,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:24,590 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-08-27 05:37:24,591 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 2 case distinctions, treesize of input 84 treesize of output 65 [2021-08-27 05:37:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:24,607 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-08-27 05:37:24,607 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 57 [2021-08-27 05:37:24,668 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:37:24,669 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 11 treesize of output 11 [2021-08-27 05:37:24,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:24,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-08-27 05:37:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:24,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-27 05:37:24,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:24,867 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-08-27 05:37:24,868 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 3 case distinctions, treesize of input 88 treesize of output 69 [2021-08-27 05:37:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:37:24,886 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-08-27 05:37:24,886 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 71 [2021-08-27 05:37:25,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 05:37:25,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2021-08-27 05:37:25,170 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-27 05:37:25,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 21 [2021-08-27 05:37:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:25,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319251095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:37:25,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:37:25,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2021-08-27 05:37:25,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627221993] [2021-08-27 05:37:25,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-27 05:37:25,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-27 05:37:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-08-27 05:37:25,206 INFO L87 Difference]: Start difference. First operand 518 states and 761 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:41,966 INFO L93 Difference]: Finished difference Result 793 states and 1050 transitions. [2021-08-27 05:37:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 05:37:41,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 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 39 [2021-08-27 05:37:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:41,968 INFO L225 Difference]: With dead ends: 793 [2021-08-27 05:37:41,968 INFO L226 Difference]: Without dead ends: 793 [2021-08-27 05:37:41,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1419.2ms TimeCoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-08-27 05:37:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-08-27 05:37:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 491. [2021-08-27 05:37:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 443 states have (on average 1.6117381489841986) internal successors, (714), 487 states have internal predecessors, (714), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 717 transitions. [2021-08-27 05:37:41,973 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 717 transitions. Word has length 39 [2021-08-27 05:37:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:41,973 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 717 transitions. [2021-08-27 05:37:41,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 717 transitions. [2021-08-27 05:37:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 05:37:41,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:41,974 INFO L512 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, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:42,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 05:37:42,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-27 05:37:42,174 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr80REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:42,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1364479865, now seen corresponding path program 1 times [2021-08-27 05:37:42,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:42,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281952796] [2021-08-27 05:37:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:42,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:42,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:42,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:42,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281952796] [2021-08-27 05:37:42,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281952796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:37:42,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335809518] [2021-08-27 05:37:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:42,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:37:42,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:37:42,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:37:42,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 05:37:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:42,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-27 05:37:42,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:37:42,872 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:37:42,905 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:37:42,906 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 11 treesize of output 11 [2021-08-27 05:37:42,929 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 18 treesize of output 14 [2021-08-27 05:37:43,009 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:37:43,009 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 1 case distinctions, treesize of input 34 treesize of output 24 [2021-08-27 05:37:43,038 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:37:43,038 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 11 treesize of output 11 [2021-08-27 05:37:43,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2021-08-27 05:37:43,199 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:37:43,200 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 1 case distinctions, treesize of input 49 treesize of output 33 [2021-08-27 05:37:43,584 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-27 05:37:43,585 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 32 [2021-08-27 05:37:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:43,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335809518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:37:43,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:37:43,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-27 05:37:43,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344450392] [2021-08-27 05:37:43,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-27 05:37:43,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-27 05:37:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-08-27 05:37:43,589 INFO L87 Difference]: Start difference. First operand 491 states and 717 transitions. Second operand has 26 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:37:51,797 INFO L93 Difference]: Finished difference Result 681 states and 966 transitions. [2021-08-27 05:37:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 05:37:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 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 40 [2021-08-27 05:37:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:37:51,799 INFO L225 Difference]: With dead ends: 681 [2021-08-27 05:37:51,799 INFO L226 Difference]: Without dead ends: 681 [2021-08-27 05:37:51,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 955.5ms TimeCoverageRelationStatistics Valid=339, Invalid=1731, Unknown=0, NotChecked=0, Total=2070 [2021-08-27 05:37:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-08-27 05:37:51,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 495. [2021-08-27 05:37:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 447 states have (on average 1.6085011185682327) internal successors, (719), 491 states have internal predecessors, (719), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 722 transitions. [2021-08-27 05:37:51,806 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 722 transitions. Word has length 40 [2021-08-27 05:37:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:37:51,806 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 722 transitions. [2021-08-27 05:37:51,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:37:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 722 transitions. [2021-08-27 05:37:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 05:37:51,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:37:51,807 INFO L512 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, 1, 1, 1, 1, 1, 1] [2021-08-27 05:37:51,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-27 05:37:52,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:37:52,021 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr81REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:37:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:37:52,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1364479864, now seen corresponding path program 1 times [2021-08-27 05:37:52,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:37:52,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550450337] [2021-08-27 05:37:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:52,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:37:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:52,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:37:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:52,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:37:52,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550450337] [2021-08-27 05:37:52,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550450337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:37:52,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293088700] [2021-08-27 05:37:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:37:52,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:37:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:37:52,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:37:52,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 05:37:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:37:52,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 05:37:52,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:37:52,879 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:37:52,910 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:37:52,910 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 11 treesize of output 11 [2021-08-27 05:37:52,941 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 18 treesize of output 14 [2021-08-27 05:37:52,945 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 13 treesize of output 9 [2021-08-27 05:37:53,043 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:37:53,043 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 1 case distinctions, treesize of input 66 treesize of output 44 [2021-08-27 05:37:53,052 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:37:53,052 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 36 [2021-08-27 05:37:53,091 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:37:53,092 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 11 treesize of output 11 [2021-08-27 05:37:53,209 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 33 treesize of output 26 [2021-08-27 05:37:53,219 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 21 treesize of output 20 [2021-08-27 05:37:53,321 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:37:53,321 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 1 case distinctions, treesize of input 81 treesize of output 53 [2021-08-27 05:37:53,331 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:37:53,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 61 [2021-08-27 05:37:53,774 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-27 05:37:53,774 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 50 [2021-08-27 05:37:53,780 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 05:37:53,780 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 37 treesize of output 28 [2021-08-27 05:37:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:37:53,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293088700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:37:53,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:37:53,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-08-27 05:37:53,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291571257] [2021-08-27 05:37:53,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 05:37:53,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:37:53,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 05:37:53,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-08-27 05:37:53,803 INFO L87 Difference]: Start difference. First operand 495 states and 722 transitions. Second operand has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:38:10,738 INFO L93 Difference]: Finished difference Result 696 states and 982 transitions. [2021-08-27 05:38:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 05:38:10,747 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 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 40 [2021-08-27 05:38:10,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:38:10,749 INFO L225 Difference]: With dead ends: 696 [2021-08-27 05:38:10,749 INFO L226 Difference]: Without dead ends: 696 [2021-08-27 05:38:10,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 985.4ms TimeCoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2021-08-27 05:38:10,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-08-27 05:38:10,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 495. [2021-08-27 05:38:10,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 447 states have (on average 1.6062639821029083) internal successors, (718), 491 states have internal predecessors, (718), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 721 transitions. [2021-08-27 05:38:10,753 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 721 transitions. Word has length 40 [2021-08-27 05:38:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:38:10,754 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 721 transitions. [2021-08-27 05:38:10,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 721 transitions. [2021-08-27 05:38:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 05:38:10,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:38:10,754 INFO L512 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:38:10,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 05:38:10,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:38:10,956 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:38:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:38:10,956 INFO L82 PathProgramCache]: Analyzing trace with hash 896862200, now seen corresponding path program 1 times [2021-08-27 05:38:10,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:38:10,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133413403] [2021-08-27 05:38:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:10,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:38:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:11,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:38:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:11,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:38:11,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133413403] [2021-08-27 05:38:11,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133413403] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:38:11,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:38:11,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:38:11,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524799860] [2021-08-27 05:38:11,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:38:11,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:38:11,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:38:11,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:38:11,010 INFO L87 Difference]: Start difference. First operand 495 states and 721 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:11,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:38:11,190 INFO L93 Difference]: Finished difference Result 487 states and 670 transitions. [2021-08-27 05:38:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:38:11,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 41 [2021-08-27 05:38:11,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:38:11,192 INFO L225 Difference]: With dead ends: 487 [2021-08-27 05:38:11,192 INFO L226 Difference]: Without dead ends: 487 [2021-08-27 05:38:11,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:38:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-08-27 05:38:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 468. [2021-08-27 05:38:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 420 states have (on average 1.588095238095238) internal successors, (667), 464 states have internal predecessors, (667), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 670 transitions. [2021-08-27 05:38:11,198 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 670 transitions. Word has length 41 [2021-08-27 05:38:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:38:11,199 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 670 transitions. [2021-08-27 05:38:11,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 670 transitions. [2021-08-27 05:38:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 05:38:11,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:38:11,200 INFO L512 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:38:11,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-27 05:38:11,200 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:38:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:38:11,201 INFO L82 PathProgramCache]: Analyzing trace with hash 670835797, now seen corresponding path program 1 times [2021-08-27 05:38:11,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:38:11,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328635531] [2021-08-27 05:38:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:11,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:38:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:11,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:38:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 05:38:11,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:38:11,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328635531] [2021-08-27 05:38:11,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328635531] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:38:11,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:38:11,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 05:38:11,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428218155] [2021-08-27 05:38:11,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:38:11,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:38:11,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:38:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:38:11,267 INFO L87 Difference]: Start difference. First operand 468 states and 670 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:38:11,596 INFO L93 Difference]: Finished difference Result 567 states and 817 transitions. [2021-08-27 05:38:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:38:11,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 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 41 [2021-08-27 05:38:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:38:11,598 INFO L225 Difference]: With dead ends: 567 [2021-08-27 05:38:11,598 INFO L226 Difference]: Without dead ends: 567 [2021-08-27 05:38:11,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:38:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-08-27 05:38:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 467. [2021-08-27 05:38:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 419 states have (on average 1.577565632458234) internal successors, (661), 463 states have internal predecessors, (661), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 664 transitions. [2021-08-27 05:38:11,602 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 664 transitions. Word has length 41 [2021-08-27 05:38:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:38:11,603 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 664 transitions. [2021-08-27 05:38:11,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 664 transitions. [2021-08-27 05:38:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 05:38:11,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:38:11,603 INFO L512 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:38:11,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-27 05:38:11,603 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:38:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:38:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash 671020495, now seen corresponding path program 1 times [2021-08-27 05:38:11,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:38:11,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548959805] [2021-08-27 05:38:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:11,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:38:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:11,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:38:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:11,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:38:11,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548959805] [2021-08-27 05:38:11,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548959805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:11,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972383086] [2021-08-27 05:38:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:11,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:38:11,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:38:11,967 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:38:11,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 05:38:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 05:38:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:38:12,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:38:12,501 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 13 treesize of output 9 [2021-08-27 05:38:12,507 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 13 treesize of output 9 [2021-08-27 05:38:12,548 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:38:12,548 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 11 treesize of output 11 [2021-08-27 05:38:12,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:38:12,589 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 23 treesize of output 22 [2021-08-27 05:38:12,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:38:12,594 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 27 treesize of output 26 [2021-08-27 05:38:12,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:38:12,729 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-08-27 05:38:12,729 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 2 case distinctions, treesize of input 84 treesize of output 65 [2021-08-27 05:38:12,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:38:12,744 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-08-27 05:38:12,745 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 57 [2021-08-27 05:38:12,801 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:38:12,801 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 11 treesize of output 11 [2021-08-27 05:38:12,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:38:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-08-27 05:38:12,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:38:12,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-27 05:38:13,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:38:13,095 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-08-27 05:38:13,096 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 3 case distinctions, treesize of input 99 treesize of output 74 [2021-08-27 05:38:13,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:38:13,112 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-08-27 05:38:13,112 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 82 [2021-08-27 05:38:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:38:13,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-08-27 05:38:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:13,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972383086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:13,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:38:13,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-27 05:38:13,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094701458] [2021-08-27 05:38:13,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 05:38:13,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:38:13,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 05:38:13,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-08-27 05:38:13,566 INFO L87 Difference]: Start difference. First operand 467 states and 664 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:38:21,302 INFO L93 Difference]: Finished difference Result 582 states and 789 transitions. [2021-08-27 05:38:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 05:38:21,302 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 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 41 [2021-08-27 05:38:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:38:21,304 INFO L225 Difference]: With dead ends: 582 [2021-08-27 05:38:21,304 INFO L226 Difference]: Without dead ends: 582 [2021-08-27 05:38:21,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1065.4ms TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 05:38:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-08-27 05:38:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 426. [2021-08-27 05:38:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 378 states have (on average 1.5582010582010581) internal successors, (589), 422 states have internal predecessors, (589), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 592 transitions. [2021-08-27 05:38:21,309 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 592 transitions. Word has length 41 [2021-08-27 05:38:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:38:21,309 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 592 transitions. [2021-08-27 05:38:21,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:21,309 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 592 transitions. [2021-08-27 05:38:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-27 05:38:21,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:38:21,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:38:21,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 05:38:21,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:38:21,513 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr103ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:38:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:38:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2032926565, now seen corresponding path program 1 times [2021-08-27 05:38:21,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:38:21,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042207508] [2021-08-27 05:38:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:21,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:38:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:21,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:38:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:21,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:38:21,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042207508] [2021-08-27 05:38:21,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042207508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:21,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465622928] [2021-08-27 05:38:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:21,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:38:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:38:21,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:38:21,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 05:38:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:22,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-27 05:38:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:38:22,397 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 31 treesize of output 27 [2021-08-27 05:38:22,512 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 05:38:22,513 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 1 case distinctions, treesize of input 45 treesize of output 35 [2021-08-27 05:38:22,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 05:38:22,786 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 31 [2021-08-27 05:38:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:23,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465622928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:23,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:38:23,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-27 05:38:23,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955877821] [2021-08-27 05:38:23,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 05:38:23,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:38:23,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 05:38:23,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-27 05:38:23,101 INFO L87 Difference]: Start difference. First operand 426 states and 592 transitions. Second operand has 23 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:38:24,448 INFO L93 Difference]: Finished difference Result 436 states and 602 transitions. [2021-08-27 05:38:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 05:38:24,449 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 1 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 42 [2021-08-27 05:38:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:38:24,450 INFO L225 Difference]: With dead ends: 436 [2021-08-27 05:38:24,450 INFO L226 Difference]: Without dead ends: 413 [2021-08-27 05:38:24,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 568.6ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-08-27 05:38:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-27 05:38:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 411. [2021-08-27 05:38:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 363 states have (on average 1.578512396694215) internal successors, (573), 407 states have internal predecessors, (573), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 576 transitions. [2021-08-27 05:38:24,453 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 576 transitions. Word has length 42 [2021-08-27 05:38:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:38:24,453 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 576 transitions. [2021-08-27 05:38:24,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 576 transitions. [2021-08-27 05:38:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 05:38:24,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:38:24,454 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:38:24,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 05:38:24,660 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,SelfDestructingSolverStorable45 [2021-08-27 05:38:24,661 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:38:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:38:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2112503977, now seen corresponding path program 1 times [2021-08-27 05:38:24,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:38:24,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876723716] [2021-08-27 05:38:24,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:24,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:38:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:25,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:38:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:25,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:38:25,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876723716] [2021-08-27 05:38:25,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876723716] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:38:25,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:38:25,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-08-27 05:38:25,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776180248] [2021-08-27 05:38:25,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 05:38:25,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:38:25,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 05:38:25,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-27 05:38:25,032 INFO L87 Difference]: Start difference. First operand 411 states and 576 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:38:26,437 INFO L93 Difference]: Finished difference Result 757 states and 1001 transitions. [2021-08-27 05:38:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 05:38:26,438 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 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 43 [2021-08-27 05:38:26,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:38:26,440 INFO L225 Difference]: With dead ends: 757 [2021-08-27 05:38:26,440 INFO L226 Difference]: Without dead ends: 757 [2021-08-27 05:38:26,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 05:38:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-08-27 05:38:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 462. [2021-08-27 05:38:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 414 states have (on average 1.567632850241546) internal successors, (649), 458 states have internal predecessors, (649), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 652 transitions. [2021-08-27 05:38:26,445 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 652 transitions. Word has length 43 [2021-08-27 05:38:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:38:26,445 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 652 transitions. [2021-08-27 05:38:26,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 652 transitions. [2021-08-27 05:38:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 05:38:26,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:38:26,446 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:38:26,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-08-27 05:38:26,446 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:38:26,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:38:26,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2112503978, now seen corresponding path program 1 times [2021-08-27 05:38:26,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:38:26,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014648410] [2021-08-27 05:38:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:26,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:38:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:27,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:38:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:27,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:38:27,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014648410] [2021-08-27 05:38:27,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014648410] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:38:27,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:38:27,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-27 05:38:27,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429660871] [2021-08-27 05:38:27,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 05:38:27,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:38:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 05:38:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-27 05:38:27,053 INFO L87 Difference]: Start difference. First operand 462 states and 652 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:28,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:38:28,599 INFO L93 Difference]: Finished difference Result 652 states and 857 transitions. [2021-08-27 05:38:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 05:38:28,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 43 [2021-08-27 05:38:28,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:38:28,602 INFO L225 Difference]: With dead ends: 652 [2021-08-27 05:38:28,602 INFO L226 Difference]: Without dead ends: 652 [2021-08-27 05:38:28,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1044.1ms TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-08-27 05:38:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-08-27 05:38:28,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 462. [2021-08-27 05:38:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 414 states have (on average 1.565217391304348) internal successors, (648), 458 states have internal predecessors, (648), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 651 transitions. [2021-08-27 05:38:28,607 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 651 transitions. Word has length 43 [2021-08-27 05:38:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:38:28,607 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 651 transitions. [2021-08-27 05:38:28,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 651 transitions. [2021-08-27 05:38:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 05:38:28,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:38:28,608 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:38:28,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-08-27 05:38:28,608 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr97ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:38:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:38:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1648905789, now seen corresponding path program 1 times [2021-08-27 05:38:28,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:38:28,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199776872] [2021-08-27 05:38:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:28,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:38:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:28,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:38:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:28,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:38:28,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199776872] [2021-08-27 05:38:28,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199776872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:28,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246024166] [2021-08-27 05:38:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:28,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:38:28,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:38:28,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:38:28,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 05:38:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:29,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-27 05:38:29,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:38:29,589 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:38:29,623 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:38:29,623 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 11 treesize of output 11 [2021-08-27 05:38:29,652 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 13 treesize of output 9 [2021-08-27 05:38:29,655 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 18 treesize of output 14 [2021-08-27 05:38:29,761 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:38:29,762 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 1 case distinctions, treesize of input 66 treesize of output 44 [2021-08-27 05:38:29,770 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:38:29,771 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 36 [2021-08-27 05:38:29,813 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:38:29,814 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 11 treesize of output 11 [2021-08-27 05:38:29,871 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:38:29,871 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 46 treesize of output 45 [2021-08-27 05:38:29,879 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:38:29,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 05:38:29,915 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 20 treesize of output 8 [2021-08-27 05:38:29,950 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:38:29,951 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 25 treesize of output 24 [2021-08-27 05:38:30,205 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 05:38:30,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 19 [2021-08-27 05:38:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:30,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246024166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:30,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:38:30,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-27 05:38:30,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545588988] [2021-08-27 05:38:30,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 05:38:30,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:38:30,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 05:38:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-08-27 05:38:30,210 INFO L87 Difference]: Start difference. First operand 462 states and 651 transitions. Second operand has 25 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:38:31,900 INFO L93 Difference]: Finished difference Result 612 states and 841 transitions. [2021-08-27 05:38:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 05:38:31,900 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 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 43 [2021-08-27 05:38:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:38:31,901 INFO L225 Difference]: With dead ends: 612 [2021-08-27 05:38:31,902 INFO L226 Difference]: Without dead ends: 612 [2021-08-27 05:38:31,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 05:38:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-27 05:38:31,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2021-08-27 05:38:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 417 states have (on average 1.5635491606714629) internal successors, (652), 461 states have internal predecessors, (652), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 655 transitions. [2021-08-27 05:38:31,909 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 655 transitions. Word has length 43 [2021-08-27 05:38:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:38:31,910 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 655 transitions. [2021-08-27 05:38:31,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 655 transitions. [2021-08-27 05:38:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 05:38:31,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:38:31,910 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:38:31,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 05:38:32,120 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,SelfDestructingSolverStorable48 [2021-08-27 05:38:32,121 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr98ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:38:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:38:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash 423528452, now seen corresponding path program 1 times [2021-08-27 05:38:32,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:38:32,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018630861] [2021-08-27 05:38:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:32,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:38:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:32,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:38:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:32,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:38:32,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018630861] [2021-08-27 05:38:32,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018630861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:32,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439434748] [2021-08-27 05:38:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:32,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:38:32,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:38:32,469 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:38:32,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 05:38:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:33,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-27 05:38:33,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:38:33,173 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:38:33,207 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:38:33,207 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 11 treesize of output 11 [2021-08-27 05:38:33,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 05:38:33,337 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:38:33,337 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 1 case distinctions, treesize of input 43 treesize of output 27 [2021-08-27 05:38:33,380 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:38:33,380 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 11 treesize of output 11 [2021-08-27 05:38:33,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 24 [2021-08-27 05:38:33,524 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:38:33,524 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 1 case distinctions, treesize of input 47 treesize of output 31 [2021-08-27 05:38:33,954 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-27 05:38:33,954 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 30 [2021-08-27 05:38:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:33,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439434748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:33,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:38:33,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-08-27 05:38:33,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044961056] [2021-08-27 05:38:33,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-27 05:38:33,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:38:33,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-27 05:38:33,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-08-27 05:38:33,969 INFO L87 Difference]: Start difference. First operand 465 states and 655 transitions. Second operand has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:53,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:38:53,045 INFO L93 Difference]: Finished difference Result 605 states and 834 transitions. [2021-08-27 05:38:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 05:38:53,045 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 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 44 [2021-08-27 05:38:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:38:53,047 INFO L225 Difference]: With dead ends: 605 [2021-08-27 05:38:53,047 INFO L226 Difference]: Without dead ends: 605 [2021-08-27 05:38:53,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1109.9ms TimeCoverageRelationStatistics Valid=301, Invalid=1591, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 05:38:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-08-27 05:38:53,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 466. [2021-08-27 05:38:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 418 states have (on average 1.562200956937799) internal successors, (653), 462 states have internal predecessors, (653), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 656 transitions. [2021-08-27 05:38:53,052 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 656 transitions. Word has length 44 [2021-08-27 05:38:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:38:53,052 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 656 transitions. [2021-08-27 05:38:53,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 656 transitions. [2021-08-27 05:38:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 05:38:53,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:38:53,052 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:38:53,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 05:38:53,276 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,SelfDestructingSolverStorable49 [2021-08-27 05:38:53,277 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:38:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:38:53,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1408623861, now seen corresponding path program 1 times [2021-08-27 05:38:53,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:38:53,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493012482] [2021-08-27 05:38:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:53,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:38:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:53,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:38:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 05:38:53,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:38:53,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493012482] [2021-08-27 05:38:53,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493012482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:53,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852462249] [2021-08-27 05:38:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:53,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:38:53,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:38:53,386 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:38:53,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 05:38:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-27 05:38:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:38:54,371 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 05:38:54,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-08-27 05:38:54,380 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:38:54,380 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 23 [2021-08-27 05:38:54,485 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-08-27 05:38:54,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 42 [2021-08-27 05:38:54,489 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 05:38:54,489 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 36 treesize of output 32 [2021-08-27 05:38:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:54,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852462249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:54,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:38:54,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-27 05:38:54,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931883861] [2021-08-27 05:38:54,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 05:38:54,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:38:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 05:38:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-27 05:38:54,658 INFO L87 Difference]: Start difference. First operand 466 states and 656 transitions. Second operand has 16 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:55,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:38:55,664 INFO L93 Difference]: Finished difference Result 635 states and 805 transitions. [2021-08-27 05:38:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 05:38:55,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 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 45 [2021-08-27 05:38:55,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:38:55,670 INFO L225 Difference]: With dead ends: 635 [2021-08-27 05:38:55,670 INFO L226 Difference]: Without dead ends: 635 [2021-08-27 05:38:55,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-08-27 05:38:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-27 05:38:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 362. [2021-08-27 05:38:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 314 states have (on average 1.4617834394904459) internal successors, (459), 358 states have internal predecessors, (459), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 462 transitions. [2021-08-27 05:38:55,674 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 462 transitions. Word has length 45 [2021-08-27 05:38:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:38:55,674 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 462 transitions. [2021-08-27 05:38:55,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:38:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 462 transitions. [2021-08-27 05:38:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-27 05:38:55,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:38:55,675 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:38:55,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 05:38:55,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:38:55,890 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr88REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:38:55,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:38:55,890 INFO L82 PathProgramCache]: Analyzing trace with hash -978622642, now seen corresponding path program 1 times [2021-08-27 05:38:55,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:38:55,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551853379] [2021-08-27 05:38:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:55,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:38:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:56,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:38:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:56,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:38:56,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551853379] [2021-08-27 05:38:56,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551853379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:38:56,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510886063] [2021-08-27 05:38:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:38:56,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:38:56,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:38:56,336 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:38:56,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 05:38:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:38:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 05:38:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:38:57,132 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:38:57,182 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:38:57,183 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 11 treesize of output 11 [2021-08-27 05:38:57,211 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 18 treesize of output 14 [2021-08-27 05:38:57,215 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 13 treesize of output 9 [2021-08-27 05:38:57,310 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:38:57,310 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 1 case distinctions, treesize of input 57 treesize of output 35 [2021-08-27 05:38:57,313 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 34 treesize of output 24 [2021-08-27 05:38:57,350 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 05:38:57,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 05:38:57,425 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 22 treesize of output 21 [2021-08-27 05:38:57,429 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 11 treesize of output 7 [2021-08-27 05:38:57,523 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:38:57,523 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 1 case distinctions, treesize of input 78 treesize of output 56 [2021-08-27 05:38:57,537 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:38:57,537 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 1 case distinctions, treesize of input 81 treesize of output 65 [2021-08-27 05:38:58,031 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 05:38:58,032 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 84 treesize of output 69 [2021-08-27 05:38:58,139 INFO L354 Elim1Store]: treesize reduction 70, result has 9.1 percent of original size [2021-08-27 05:38:58,139 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 43 [2021-08-27 05:38:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:38:58,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510886063] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:38:58,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:38:58,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [19] total 31 [2021-08-27 05:38:58,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167131809] [2021-08-27 05:38:58,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 05:38:58,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:38:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 05:38:58,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-08-27 05:38:58,228 INFO L87 Difference]: Start difference. First operand 362 states and 462 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:07,746 INFO L93 Difference]: Finished difference Result 624 states and 761 transitions. [2021-08-27 05:39:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 05:39:07,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (2), 1 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 46 [2021-08-27 05:39:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:07,747 INFO L225 Difference]: With dead ends: 624 [2021-08-27 05:39:07,747 INFO L226 Difference]: Without dead ends: 624 [2021-08-27 05:39:07,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2026.5ms TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 05:39:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-08-27 05:39:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 367. [2021-08-27 05:39:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 319 states have (on average 1.457680250783699) internal successors, (465), 363 states have internal predecessors, (465), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:07,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 468 transitions. [2021-08-27 05:39:07,751 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 468 transitions. Word has length 46 [2021-08-27 05:39:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:07,751 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 468 transitions. [2021-08-27 05:39:07,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 468 transitions. [2021-08-27 05:39:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-27 05:39:07,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:07,751 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:07,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 05:39:07,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:39:07,961 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr89REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:07,961 INFO L82 PathProgramCache]: Analyzing trace with hash -978622641, now seen corresponding path program 1 times [2021-08-27 05:39:07,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:07,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841260673] [2021-08-27 05:39:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:07,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:08,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:08,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:08,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841260673] [2021-08-27 05:39:08,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841260673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:39:08,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494982412] [2021-08-27 05:39:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:08,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:39:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:39:08,713 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:39:08,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 05:39:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:09,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-27 05:39:09,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:39:09,602 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:39:09,638 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:39:09,639 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 11 treesize of output 11 [2021-08-27 05:39:09,667 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 18 treesize of output 14 [2021-08-27 05:39:09,670 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 13 treesize of output 9 [2021-08-27 05:39:09,779 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:39:09,779 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 1 case distinctions, treesize of input 57 treesize of output 35 [2021-08-27 05:39:09,781 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 34 treesize of output 24 [2021-08-27 05:39:09,811 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:39:09,811 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 11 treesize of output 11 [2021-08-27 05:39:09,874 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 22 treesize of output 21 [2021-08-27 05:39:09,880 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 11 treesize of output 7 [2021-08-27 05:39:10,000 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:39:10,000 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 1 case distinctions, treesize of input 83 treesize of output 61 [2021-08-27 05:39:10,009 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:39:10,009 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 1 case distinctions, treesize of input 86 treesize of output 70 [2021-08-27 05:39:10,580 INFO L354 Elim1Store]: treesize reduction 110, result has 6.0 percent of original size [2021-08-27 05:39:10,580 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 76 [2021-08-27 05:39:10,591 INFO L354 Elim1Store]: treesize reduction 70, result has 9.1 percent of original size [2021-08-27 05:39:10,591 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 43 [2021-08-27 05:39:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:10,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494982412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:39:10,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:39:10,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 35 [2021-08-27 05:39:10,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369469925] [2021-08-27 05:39:10,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 05:39:10,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 05:39:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 05:39:10,660 INFO L87 Difference]: Start difference. First operand 367 states and 468 transitions. Second operand has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:18,818 INFO L93 Difference]: Finished difference Result 811 states and 996 transitions. [2021-08-27 05:39:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-27 05:39:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 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 46 [2021-08-27 05:39:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:18,820 INFO L225 Difference]: With dead ends: 811 [2021-08-27 05:39:18,820 INFO L226 Difference]: Without dead ends: 811 [2021-08-27 05:39:18,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 2449.1ms TimeCoverageRelationStatistics Valid=646, Invalid=3776, Unknown=0, NotChecked=0, Total=4422 [2021-08-27 05:39:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-08-27 05:39:18,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 370. [2021-08-27 05:39:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 322 states have (on average 1.4565217391304348) internal successors, (469), 366 states have internal predecessors, (469), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 472 transitions. [2021-08-27 05:39:18,825 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 472 transitions. Word has length 46 [2021-08-27 05:39:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:18,825 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 472 transitions. [2021-08-27 05:39:18,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 472 transitions. [2021-08-27 05:39:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 05:39:18,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:18,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:18,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 05:39:19,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-27 05:39:19,041 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr58REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash 140734511, now seen corresponding path program 1 times [2021-08-27 05:39:19,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:19,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351496580] [2021-08-27 05:39:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:19,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:19,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:19,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:19,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351496580] [2021-08-27 05:39:19,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351496580] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:39:19,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:39:19,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:39:19,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623169133] [2021-08-27 05:39:19,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 05:39:19,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 05:39:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:39:19,156 INFO L87 Difference]: Start difference. First operand 370 states and 472 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:19,626 INFO L93 Difference]: Finished difference Result 501 states and 630 transitions. [2021-08-27 05:39:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:39:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 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 47 [2021-08-27 05:39:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:19,628 INFO L225 Difference]: With dead ends: 501 [2021-08-27 05:39:19,628 INFO L226 Difference]: Without dead ends: 501 [2021-08-27 05:39:19,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-27 05:39:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-08-27 05:39:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 369. [2021-08-27 05:39:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 322 states have (on average 1.453416149068323) internal successors, (468), 365 states have internal predecessors, (468), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 471 transitions. [2021-08-27 05:39:19,631 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 471 transitions. Word has length 47 [2021-08-27 05:39:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:19,631 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 471 transitions. [2021-08-27 05:39:19,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 471 transitions. [2021-08-27 05:39:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 05:39:19,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:19,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:19,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-08-27 05:39:19,633 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr59REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash 140734512, now seen corresponding path program 1 times [2021-08-27 05:39:19,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:19,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977196333] [2021-08-27 05:39:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:19,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:20,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:20,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977196333] [2021-08-27 05:39:20,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977196333] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:39:20,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:39:20,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-08-27 05:39:20,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134274150] [2021-08-27 05:39:20,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 05:39:20,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 05:39:20,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-08-27 05:39:20,183 INFO L87 Difference]: Start difference. First operand 369 states and 471 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:22,938 INFO L93 Difference]: Finished difference Result 1013 states and 1192 transitions. [2021-08-27 05:39:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-27 05:39:22,938 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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 47 [2021-08-27 05:39:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:22,940 INFO L225 Difference]: With dead ends: 1013 [2021-08-27 05:39:22,940 INFO L226 Difference]: Without dead ends: 1013 [2021-08-27 05:39:22,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1475.6ms TimeCoverageRelationStatistics Valid=645, Invalid=2217, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 05:39:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-08-27 05:39:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 431. [2021-08-27 05:39:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 384 states have (on average 1.4453125) internal successors, (555), 427 states have internal predecessors, (555), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 558 transitions. [2021-08-27 05:39:22,945 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 558 transitions. Word has length 47 [2021-08-27 05:39:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:22,945 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 558 transitions. [2021-08-27 05:39:22,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 558 transitions. [2021-08-27 05:39:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 05:39:22,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:22,946 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:22,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-08-27 05:39:22,946 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash 380549797, now seen corresponding path program 1 times [2021-08-27 05:39:22,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:22,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457267794] [2021-08-27 05:39:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:22,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:23,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:23,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:23,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457267794] [2021-08-27 05:39:23,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457267794] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:39:23,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:39:23,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-08-27 05:39:23,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120610016] [2021-08-27 05:39:23,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 05:39:23,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 05:39:23,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-27 05:39:23,281 INFO L87 Difference]: Start difference. First operand 431 states and 558 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:24,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:24,637 INFO L93 Difference]: Finished difference Result 716 states and 887 transitions. [2021-08-27 05:39:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 05:39:24,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 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 47 [2021-08-27 05:39:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:24,638 INFO L225 Difference]: With dead ends: 716 [2021-08-27 05:39:24,638 INFO L226 Difference]: Without dead ends: 716 [2021-08-27 05:39:24,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 544.0ms TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 05:39:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-27 05:39:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 488. [2021-08-27 05:39:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 441 states have (on average 1.4421768707482994) internal successors, (636), 484 states have internal predecessors, (636), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 639 transitions. [2021-08-27 05:39:24,643 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 639 transitions. Word has length 47 [2021-08-27 05:39:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:24,643 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 639 transitions. [2021-08-27 05:39:24,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 639 transitions. [2021-08-27 05:39:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 05:39:24,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:24,643 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:24,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-08-27 05:39:24,643 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash 380549798, now seen corresponding path program 1 times [2021-08-27 05:39:24,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:24,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120638240] [2021-08-27 05:39:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:24,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:25,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:25,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:25,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120638240] [2021-08-27 05:39:25,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120638240] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:39:25,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:39:25,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-08-27 05:39:25,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577441649] [2021-08-27 05:39:25,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 05:39:25,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 05:39:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-27 05:39:25,144 INFO L87 Difference]: Start difference. First operand 488 states and 639 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:27,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:27,111 INFO L93 Difference]: Finished difference Result 716 states and 887 transitions. [2021-08-27 05:39:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 05:39:27,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 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 47 [2021-08-27 05:39:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:27,113 INFO L225 Difference]: With dead ends: 716 [2021-08-27 05:39:27,113 INFO L226 Difference]: Without dead ends: 716 [2021-08-27 05:39:27,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 858.3ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 05:39:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-27 05:39:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 488. [2021-08-27 05:39:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 441 states have (on average 1.439909297052154) internal successors, (635), 484 states have internal predecessors, (635), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 638 transitions. [2021-08-27 05:39:27,117 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 638 transitions. Word has length 47 [2021-08-27 05:39:27,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:27,117 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 638 transitions. [2021-08-27 05:39:27,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 638 transitions. [2021-08-27 05:39:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 05:39:27,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:27,118 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:27,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-08-27 05:39:27,118 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr90REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:27,118 INFO L82 PathProgramCache]: Analyzing trace with hash -272530550, now seen corresponding path program 1 times [2021-08-27 05:39:27,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:27,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928000650] [2021-08-27 05:39:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:27,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:27,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 05:39:27,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:27,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928000650] [2021-08-27 05:39:27,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928000650] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:39:27,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:39:27,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:39:27,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127776180] [2021-08-27 05:39:27,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:39:27,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:27,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:39:27,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:39:27,164 INFO L87 Difference]: Start difference. First operand 488 states and 638 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:27,441 INFO L93 Difference]: Finished difference Result 487 states and 634 transitions. [2021-08-27 05:39:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:39:27,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 47 [2021-08-27 05:39:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:27,442 INFO L225 Difference]: With dead ends: 487 [2021-08-27 05:39:27,442 INFO L226 Difference]: Without dead ends: 487 [2021-08-27 05:39:27,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:39:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-08-27 05:39:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 487. [2021-08-27 05:39:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 441 states have (on average 1.4308390022675737) internal successors, (631), 483 states have internal predecessors, (631), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 634 transitions. [2021-08-27 05:39:27,446 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 634 transitions. Word has length 47 [2021-08-27 05:39:27,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:27,446 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 634 transitions. [2021-08-27 05:39:27,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 634 transitions. [2021-08-27 05:39:27,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 05:39:27,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:27,447 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:27,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-08-27 05:39:27,447 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr91REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:27,448 INFO L82 PathProgramCache]: Analyzing trace with hash -272530549, now seen corresponding path program 1 times [2021-08-27 05:39:27,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:27,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850189974] [2021-08-27 05:39:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:27,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:27,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 05:39:27,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:27,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850189974] [2021-08-27 05:39:27,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850189974] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:39:27,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:39:27,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 05:39:27,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717226107] [2021-08-27 05:39:27,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:39:27,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:27,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:39:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:39:27,526 INFO L87 Difference]: Start difference. First operand 487 states and 634 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:27,829 INFO L93 Difference]: Finished difference Result 486 states and 630 transitions. [2021-08-27 05:39:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:39:27,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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 47 [2021-08-27 05:39:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:27,830 INFO L225 Difference]: With dead ends: 486 [2021-08-27 05:39:27,830 INFO L226 Difference]: Without dead ends: 486 [2021-08-27 05:39:27,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:39:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-08-27 05:39:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 486. [2021-08-27 05:39:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 441 states have (on average 1.4217687074829932) internal successors, (627), 482 states have internal predecessors, (627), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 630 transitions. [2021-08-27 05:39:27,834 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 630 transitions. Word has length 47 [2021-08-27 05:39:27,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:27,834 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 630 transitions. [2021-08-27 05:39:27,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 630 transitions. [2021-08-27 05:39:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 05:39:27,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:27,835 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:27,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-08-27 05:39:27,835 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr93ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:27,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:27,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1469144527, now seen corresponding path program 1 times [2021-08-27 05:39:27,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:27,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990518175] [2021-08-27 05:39:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:27,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:28,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:28,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:28,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990518175] [2021-08-27 05:39:28,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990518175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:39:28,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141223193] [2021-08-27 05:39:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:28,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:39:28,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:39:28,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:39:28,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 05:39:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:29,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-27 05:39:29,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:39:29,349 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:39:29,384 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:39:29,385 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 11 treesize of output 11 [2021-08-27 05:39:29,411 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 18 treesize of output 14 [2021-08-27 05:39:29,416 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 13 treesize of output 9 [2021-08-27 05:39:29,510 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:39:29,510 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 1 case distinctions, treesize of input 57 treesize of output 35 [2021-08-27 05:39:29,512 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 34 treesize of output 24 [2021-08-27 05:39:29,543 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:39:29,544 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 11 treesize of output 11 [2021-08-27 05:39:29,604 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 22 treesize of output 21 [2021-08-27 05:39:29,612 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 11 treesize of output 7 [2021-08-27 05:39:29,693 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:39:29,693 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 1 case distinctions, treesize of input 76 treesize of output 54 [2021-08-27 05:39:29,705 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:39:29,705 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 1 case distinctions, treesize of input 79 treesize of output 63 [2021-08-27 05:39:32,107 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 05:39:32,108 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 77 treesize of output 62 [2021-08-27 05:39:32,208 INFO L354 Elim1Store]: treesize reduction 70, result has 9.1 percent of original size [2021-08-27 05:39:32,208 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 36 [2021-08-27 05:39:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:32,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141223193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:39:32,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:39:32,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2021-08-27 05:39:32,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308218616] [2021-08-27 05:39:32,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 05:39:32,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:32,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 05:39:32,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=950, Unknown=2, NotChecked=0, Total=1056 [2021-08-27 05:39:32,266 INFO L87 Difference]: Start difference. First operand 486 states and 630 transitions. Second operand has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:46,929 INFO L93 Difference]: Finished difference Result 871 states and 1079 transitions. [2021-08-27 05:39:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 05:39:46,929 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 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 50 [2021-08-27 05:39:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:46,930 INFO L225 Difference]: With dead ends: 871 [2021-08-27 05:39:46,930 INFO L226 Difference]: Without dead ends: 871 [2021-08-27 05:39:46,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 3535.9ms TimeCoverageRelationStatistics Valid=432, Invalid=2646, Unknown=2, NotChecked=0, Total=3080 [2021-08-27 05:39:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-08-27 05:39:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 487. [2021-08-27 05:39:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 442 states have (on average 1.420814479638009) internal successors, (628), 483 states have internal predecessors, (628), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 631 transitions. [2021-08-27 05:39:46,935 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 631 transitions. Word has length 50 [2021-08-27 05:39:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:46,935 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 631 transitions. [2021-08-27 05:39:46,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 631 transitions. [2021-08-27 05:39:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 05:39:46,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:46,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:46,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 05:39:47,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:39:47,145 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr59REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1445104684, now seen corresponding path program 1 times [2021-08-27 05:39:47,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:47,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774384657] [2021-08-27 05:39:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:47,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:47,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:47,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:47,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774384657] [2021-08-27 05:39:47,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774384657] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:39:47,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:39:47,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:39:47,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068737457] [2021-08-27 05:39:47,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 05:39:47,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 05:39:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:39:47,263 INFO L87 Difference]: Start difference. First operand 487 states and 631 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:47,839 INFO L93 Difference]: Finished difference Result 663 states and 857 transitions. [2021-08-27 05:39:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:39:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 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 51 [2021-08-27 05:39:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:47,841 INFO L225 Difference]: With dead ends: 663 [2021-08-27 05:39:47,841 INFO L226 Difference]: Without dead ends: 663 [2021-08-27 05:39:47,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:39:47,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-27 05:39:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 422. [2021-08-27 05:39:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 378 states have (on average 1.4232804232804233) internal successors, (538), 418 states have internal predecessors, (538), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 541 transitions. [2021-08-27 05:39:47,844 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 541 transitions. Word has length 51 [2021-08-27 05:39:47,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:47,845 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 541 transitions. [2021-08-27 05:39:47,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 541 transitions. [2021-08-27 05:39:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 05:39:47,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:47,845 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:47,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-08-27 05:39:47,845 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting mainErr103ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:47,845 INFO L82 PathProgramCache]: Analyzing trace with hash -46663346, now seen corresponding path program 1 times [2021-08-27 05:39:47,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:47,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075233502] [2021-08-27 05:39:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:47,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:48,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:48,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:48,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075233502] [2021-08-27 05:39:48,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075233502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:39:48,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380621443] [2021-08-27 05:39:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:48,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:39:48,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:39:48,257 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:39:48,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 05:39:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:49,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-27 05:39:49,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:39:49,289 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:39:49,334 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 05:39:49,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 05:39:49,372 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 13 treesize of output 9 [2021-08-27 05:39:49,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 05:39:49,509 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:39:49,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-08-27 05:39:49,518 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:39:49,519 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 54 treesize of output 47 [2021-08-27 05:39:49,571 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-08-27 05:39:49,571 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 22 treesize of output 24 [2021-08-27 05:39:49,644 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 52 treesize of output 51 [2021-08-27 05:39:49,647 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 41 treesize of output 34 [2021-08-27 05:39:49,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-08-27 05:39:49,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-08-27 05:39:50,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 05:39:50,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 05:39:50,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 91 [2021-08-27 05:39:50,320 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 25 treesize of output 13 [2021-08-27 05:39:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:50,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380621443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:39:50,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:39:50,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-08-27 05:39:50,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986118122] [2021-08-27 05:39:50,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 05:39:50,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:50,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 05:39:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 05:39:50,422 INFO L87 Difference]: Start difference. First operand 422 states and 541 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:39:52,557 INFO L93 Difference]: Finished difference Result 505 states and 630 transitions. [2021-08-27 05:39:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 05:39:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 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 51 [2021-08-27 05:39:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:39:52,558 INFO L225 Difference]: With dead ends: 505 [2021-08-27 05:39:52,558 INFO L226 Difference]: Without dead ends: 503 [2021-08-27 05:39:52,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1231.2ms TimeCoverageRelationStatistics Valid=277, Invalid=2075, Unknown=0, NotChecked=0, Total=2352 [2021-08-27 05:39:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-27 05:39:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 419. [2021-08-27 05:39:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 375 states have (on average 1.424) internal successors, (534), 415 states have internal predecessors, (534), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 537 transitions. [2021-08-27 05:39:52,562 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 537 transitions. Word has length 51 [2021-08-27 05:39:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:39:52,562 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 537 transitions. [2021-08-27 05:39:52,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:39:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 537 transitions. [2021-08-27 05:39:52,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 05:39:52,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:39:52,562 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:39:52,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 05:39:52,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:39:52,773 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:39:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:39:52,773 INFO L82 PathProgramCache]: Analyzing trace with hash 908466468, now seen corresponding path program 1 times [2021-08-27 05:39:52,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:39:52,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017747312] [2021-08-27 05:39:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:52,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:39:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:53,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:39:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:39:53,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:39:53,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017747312] [2021-08-27 05:39:53,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017747312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:39:53,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976077096] [2021-08-27 05:39:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:39:53,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:39:53,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:39:53,048 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:39:53,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 05:39:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:39:54,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-27 05:39:54,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:39:54,145 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:39:54,168 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:39:54,168 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 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-27 05:39:54,187 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 22 treesize of output 18 [2021-08-27 05:39:54,267 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:39:54,267 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-27 05:39:54,562 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:39:54,563 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 11 treesize of output 11 [2021-08-27 05:39:54,607 INFO L354 Elim1Store]: treesize reduction 26, result has 38.1 percent of original size [2021-08-27 05:39:54,607 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 34 [2021-08-27 05:39:54,661 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-27 05:39:54,661 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-08-27 05:39:54,737 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-08-27 05:39:54,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 53 [2021-08-27 05:39:54,818 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 05:39:54,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 05:39:54,917 INFO L354 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2021-08-27 05:39:54,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 74 [2021-08-27 05:39:56,882 INFO L354 Elim1Store]: treesize reduction 238, result has 22.7 percent of original size [2021-08-27 05:39:56,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 116 [2021-08-27 05:39:59,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 05:39:59,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:39:59,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-27 05:39:59,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453186027] [2021-08-27 05:39:59,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 05:39:59,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:39:59,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 05:39:59,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=653, Unknown=5, NotChecked=0, Total=756 [2021-08-27 05:39:59,972 INFO L87 Difference]: Start difference. First operand 419 states and 537 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:40:01,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:40:01,161 INFO L93 Difference]: Finished difference Result 745 states and 920 transitions. [2021-08-27 05:40:01,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 05:40:01,162 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 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 52 [2021-08-27 05:40:01,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:40:01,163 INFO L225 Difference]: With dead ends: 745 [2021-08-27 05:40:01,163 INFO L226 Difference]: Without dead ends: 745 [2021-08-27 05:40:01,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 4457.1ms TimeCoverageRelationStatistics Valid=248, Invalid=1469, Unknown=5, NotChecked=0, Total=1722 [2021-08-27 05:40:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-08-27 05:40:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 423. [2021-08-27 05:40:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 379 states have (on average 1.424802110817942) internal successors, (540), 419 states have internal predecessors, (540), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:40:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 543 transitions. [2021-08-27 05:40:01,169 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 543 transitions. Word has length 52 [2021-08-27 05:40:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:40:01,170 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 543 transitions. [2021-08-27 05:40:01,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:40:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 543 transitions. [2021-08-27 05:40:01,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 05:40:01,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:40:01,171 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:40:01,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 05:40:01,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:40:01,381 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:40:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:40:01,381 INFO L82 PathProgramCache]: Analyzing trace with hash 908466469, now seen corresponding path program 1 times [2021-08-27 05:40:01,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:40:01,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586919549] [2021-08-27 05:40:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:40:01,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:40:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:40:02,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:40:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:40:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:40:02,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:40:02,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586919549] [2021-08-27 05:40:02,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586919549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:40:02,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376548095] [2021-08-27 05:40:02,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:40:02,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:40:02,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:40:02,287 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:40:02,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 05:40:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:40:03,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-27 05:40:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:40:03,593 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:40:03,620 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:40:03,621 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 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-27 05:40:03,647 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 22 treesize of output 18 [2021-08-27 05:40:03,748 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:40:03,749 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-27 05:40:04,077 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:40:04,078 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 11 treesize of output 11 [2021-08-27 05:40:04,142 INFO L354 Elim1Store]: treesize reduction 26, result has 38.1 percent of original size [2021-08-27 05:40:04,142 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 34 [2021-08-27 05:40:04,206 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-27 05:40:04,206 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-08-27 05:40:04,282 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-08-27 05:40:04,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 53 [2021-08-27 05:40:04,393 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 05:40:04,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 05:40:04,490 INFO L354 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2021-08-27 05:40:04,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 74 [2021-08-27 05:40:06,776 INFO L354 Elim1Store]: treesize reduction 238, result has 22.7 percent of original size [2021-08-27 05:40:06,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 116 [2021-08-27 05:40:10,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 05:40:10,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:40:10,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-08-27 05:40:10,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885794726] [2021-08-27 05:40:10,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 05:40:10,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:40:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 05:40:10,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1323, Unknown=5, NotChecked=0, Total=1482 [2021-08-27 05:40:10,020 INFO L87 Difference]: Start difference. First operand 423 states and 543 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:40:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:40:13,383 INFO L93 Difference]: Finished difference Result 800 states and 974 transitions. [2021-08-27 05:40:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-27 05:40:13,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 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 52 [2021-08-27 05:40:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:40:13,385 INFO L225 Difference]: With dead ends: 800 [2021-08-27 05:40:13,385 INFO L226 Difference]: Without dead ends: 800 [2021-08-27 05:40:13,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 6805.5ms TimeCoverageRelationStatistics Valid=633, Invalid=3652, Unknown=5, NotChecked=0, Total=4290 [2021-08-27 05:40:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-08-27 05:40:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 489. [2021-08-27 05:40:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 445 states have (on average 1.4179775280898876) internal successors, (631), 485 states have internal predecessors, (631), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:40:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 634 transitions. [2021-08-27 05:40:13,389 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 634 transitions. Word has length 52 [2021-08-27 05:40:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:40:13,389 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 634 transitions. [2021-08-27 05:40:13,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:40:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 634 transitions. [2021-08-27 05:40:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 05:40:13,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:40:13,390 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:40:13,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 05:40:13,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:40:13,591 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting mainErr76REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:40:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:40:13,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1196361071, now seen corresponding path program 1 times [2021-08-27 05:40:13,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:40:13,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616556237] [2021-08-27 05:40:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:40:13,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:40:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:40:13,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:40:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:40:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:40:13,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:40:13,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616556237] [2021-08-27 05:40:13,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616556237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:40:13,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169021768] [2021-08-27 05:40:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:40:13,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:40:13,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:40:13,949 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:40:13,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 05:40:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:40:15,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-27 05:40:15,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:40:15,222 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:40:15,265 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:40:15,266 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 11 treesize of output 11 [2021-08-27 05:40:15,297 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 18 treesize of output 14 [2021-08-27 05:40:15,302 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 13 treesize of output 9 [2021-08-27 05:40:15,416 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:40:15,416 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 44 [2021-08-27 05:40:15,425 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:40:15,425 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 36 [2021-08-27 05:40:15,471 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:40:15,471 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 11 treesize of output 11 [2021-08-27 05:40:15,533 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 21 treesize of output 20 [2021-08-27 05:40:15,540 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 22 treesize of output 21 [2021-08-27 05:40:15,617 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:40:15,618 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 60 [2021-08-27 05:40:15,627 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:40:15,628 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 1 case distinctions, treesize of input 69 treesize of output 53 [2021-08-27 05:40:16,236 INFO L354 Elim1Store]: treesize reduction 92, result has 7.1 percent of original size [2021-08-27 05:40:16,237 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 55 [2021-08-27 05:40:16,246 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-27 05:40:16,247 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 30 [2021-08-27 05:40:16,332 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 05:40:16,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 05:40:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:40:16,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169021768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:40:16,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:40:16,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-27 05:40:16,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132071414] [2021-08-27 05:40:16,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 05:40:16,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:40:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 05:40:16,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-08-27 05:40:16,369 INFO L87 Difference]: Start difference. First operand 489 states and 634 transitions. Second operand has 30 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 29 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:40:19,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:40:19,255 INFO L93 Difference]: Finished difference Result 622 states and 778 transitions. [2021-08-27 05:40:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 05:40:19,255 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 29 states have internal predecessors, (94), 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 52 [2021-08-27 05:40:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:40:19,256 INFO L225 Difference]: With dead ends: 622 [2021-08-27 05:40:19,256 INFO L226 Difference]: Without dead ends: 622 [2021-08-27 05:40:19,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1227.9ms TimeCoverageRelationStatistics Valid=398, Invalid=2682, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 05:40:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-08-27 05:40:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 490. [2021-08-27 05:40:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 446 states have (on average 1.4170403587443947) internal successors, (632), 486 states have internal predecessors, (632), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:40:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 635 transitions. [2021-08-27 05:40:19,260 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 635 transitions. Word has length 52 [2021-08-27 05:40:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:40:19,260 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 635 transitions. [2021-08-27 05:40:19,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 29 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:40:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 635 transitions. [2021-08-27 05:40:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 05:40:19,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:40:19,261 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:40:19,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 05:40:19,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:40:19,474 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:40:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:40:19,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2069726176, now seen corresponding path program 1 times [2021-08-27 05:40:19,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:40:19,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590616088] [2021-08-27 05:40:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:40:19,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:40:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:40:19,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:40:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:40:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:40:19,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:40:19,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590616088] [2021-08-27 05:40:19,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590616088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:40:19,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872857736] [2021-08-27 05:40:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:40:19,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:40:19,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:40:19,978 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:40:19,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 05:40:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:40:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 05:40:21,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:40:21,339 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:40:21,364 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:40:21,364 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 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-27 05:40:21,416 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 22 treesize of output 18 [2021-08-27 05:40:21,517 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:40:21,517 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-27 05:40:21,545 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:40:21,545 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 11 treesize of output 11 [2021-08-27 05:40:21,616 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 32 treesize of output 25 [2021-08-27 05:40:21,685 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:40:21,685 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 1 case distinctions, treesize of input 59 treesize of output 37 [2021-08-27 05:40:22,176 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-08-27 05:40:22,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-08-27 05:40:22,285 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-08-27 05:40:22,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 51 [2021-08-27 05:40:22,378 INFO L354 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2021-08-27 05:40:22,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 74 treesize of output 58 [2021-08-27 05:40:22,486 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-08-27 05:40:22,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 70 [2021-08-27 05:40:22,632 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-08-27 05:40:22,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-08-27 05:40:22,777 INFO L354 Elim1Store]: treesize reduction 146, result has 14.1 percent of original size [2021-08-27 05:40:22,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 115 treesize of output 99 [2021-08-27 05:40:26,984 INFO L354 Elim1Store]: treesize reduction 356, result has 12.1 percent of original size [2021-08-27 05:40:26,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 199 treesize of output 118 [2021-08-27 05:40:31,202 INFO L354 Elim1Store]: treesize reduction 210, result has 16.3 percent of original size [2021-08-27 05:40:31,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 145 treesize of output 156 [2021-08-27 05:40:35,503 INFO L354 Elim1Store]: treesize reduction 189, result has 3.1 percent of original size [2021-08-27 05:40:35,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 182 treesize of output 74 [2021-08-27 05:40:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:40:35,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872857736] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:40:35,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:40:35,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [20] total 41 [2021-08-27 05:40:35,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383431917] [2021-08-27 05:40:35,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 05:40:35,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:40:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 05:40:35,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1530, Unknown=10, NotChecked=0, Total=1722 [2021-08-27 05:40:35,580 INFO L87 Difference]: Start difference. First operand 490 states and 635 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:20,226 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-27 05:43:20,249 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 101 [2021-08-27 05:43:20,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 05:43:20,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:43:20,428 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:881) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:235) ... 36 more [2021-08-27 05:43:20,430 INFO L168 Benchmark]: Toolchain (without parser) took 433915.08 ms. Allocated memory was 54.5 MB in the beginning and 885.0 MB in the end (delta: 830.5 MB). Free memory was 29.4 MB in the beginning and 461.9 MB in the end (delta: -432.5 MB). Peak memory consumption was 398.3 MB. Max. memory is 16.1 GB. [2021-08-27 05:43:20,431 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 35.6 MB in the beginning and 35.6 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:43:20,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.52 ms. Allocated memory was 54.5 MB in the beginning and 79.7 MB in the end (delta: 25.2 MB). Free memory was 29.3 MB in the beginning and 54.9 MB in the end (delta: -25.6 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-08-27 05:43:20,431 INFO L168 Benchmark]: Boogie Preprocessor took 68.49 ms. Allocated memory is still 79.7 MB. Free memory was 54.9 MB in the beginning and 51.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:43:20,431 INFO L168 Benchmark]: RCFGBuilder took 659.00 ms. Allocated memory was 79.7 MB in the beginning and 109.1 MB in the end (delta: 29.4 MB). Free memory was 51.4 MB in the beginning and 67.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:43:20,431 INFO L168 Benchmark]: TraceAbstraction took 432798.16 ms. Allocated memory was 109.1 MB in the beginning and 885.0 MB in the end (delta: 775.9 MB). Free memory was 66.3 MB in the beginning and 461.9 MB in the end (delta: -395.5 MB). Peak memory consumption was 380.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:43:20,432 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 35.6 MB in the beginning and 35.6 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 384.52 ms. Allocated memory was 54.5 MB in the beginning and 79.7 MB in the end (delta: 25.2 MB). Free memory was 29.3 MB in the beginning and 54.9 MB in the end (delta: -25.6 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.49 ms. Allocated memory is still 79.7 MB. Free memory was 54.9 MB in the beginning and 51.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 659.00 ms. Allocated memory was 79.7 MB in the beginning and 109.1 MB in the end (delta: 29.4 MB). Free memory was 51.4 MB in the beginning and 67.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 432798.16 ms. Allocated memory was 109.1 MB in the beginning and 885.0 MB in the end (delta: 775.9 MB). Free memory was 66.3 MB in the beginning and 461.9 MB in the end (delta: -395.5 MB). Peak memory consumption was 380.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 05:43:21,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:43:21,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:43:21,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:43:21,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:43:21,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:43:21,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:43:21,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:43:21,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:43:21,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:43:21,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:43:21,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:43:21,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:43:21,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:43:21,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:43:21,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:43:21,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:43:21,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:43:21,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:43:21,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:43:21,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:43:21,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:43:21,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:43:21,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:43:21,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:43:21,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:43:21,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:43:21,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:43:21,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:43:21,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:43:21,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:43:21,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:43:21,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:43:21,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:43:21,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:43:21,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:43:21,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:43:21,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:43:21,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:43:21,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:43:21,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:43:21,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-27 05:43:21,987 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:43:21,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:43:21,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:43:21,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:43:21,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:43:21,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:43:21,988 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:43:21,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:43:21,989 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:43:21,989 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:43:21,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:43:21,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:43:21,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:43:21,990 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:43:21,990 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:43:21,990 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:43:21,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:43:21,990 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:43:21,990 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-27 05:43:21,990 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-27 05:43:21,990 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:43:21,991 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:43:21,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:43:21,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:43:21,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:43:21,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:43:21,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:43:21,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:43:21,992 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-27 05:43:21,992 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-27 05:43:21,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:43:21,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-27 05:43:21,992 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9290e367c892787275a10b4a890113c651652b43 [2021-08-27 05:43:22,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:43:22,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:43:22,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:43:22,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:43:22,216 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:43:22,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i [2021-08-27 05:43:22,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94290d61e/90a9191e31164c258556b7aad81d98e5/FLAG4095998e2 [2021-08-27 05:43:22,694 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:43:22,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext/tree_of_cslls.i [2021-08-27 05:43:22,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94290d61e/90a9191e31164c258556b7aad81d98e5/FLAG4095998e2 [2021-08-27 05:43:22,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94290d61e/90a9191e31164c258556b7aad81d98e5 [2021-08-27 05:43:22,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:43:22,723 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:43:22,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:43:22,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:43:22,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:43:22,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:43:22" (1/1) ... [2021-08-27 05:43:22,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626fb566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:22, skipping insertion in model container [2021-08-27 05:43:22,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:43:22" (1/1) ... [2021-08-27 05:43:22,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:43:22,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:43:22,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:43:23,019 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:43:23,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:43:23,135 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:43:23,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:23 WrapperNode [2021-08-27 05:43:23,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:43:23,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:43:23,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:43:23,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:43:23,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:23" (1/1) ... [2021-08-27 05:43:23,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:23" (1/1) ... [2021-08-27 05:43:23,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:23" (1/1) ... [2021-08-27 05:43:23,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:23" (1/1) ... [2021-08-27 05:43:23,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:23" (1/1) ... [2021-08-27 05:43:23,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:23" (1/1) ... [2021-08-27 05:43:23,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:23" (1/1) ... [2021-08-27 05:43:23,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:43:23,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:43:23,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:43:23,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:43:23,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:23" (1/1) ... [2021-08-27 05:43:23,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:43:23,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:43:23,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 05:43:23,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 05:43:23,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:43:23,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:43:23,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 05:43:23,343 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:43:23,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 05:43:23,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 05:43:23,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 05:43:23,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 05:43:23,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 05:43:23,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:43:23,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:43:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:43:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:43:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 05:43:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 05:43:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:43:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:43:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 05:43:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 05:43:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 05:43:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 05:43:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 05:43:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 05:43:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 05:43:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 05:43:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 05:43:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 05:43:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 05:43:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 05:43:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 05:43:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 05:43:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 05:43:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 05:43:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 05:43:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 05:43:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 05:43:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 05:43:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 05:43:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 05:43:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 05:43:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 05:43:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 05:43:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 05:43:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 05:43:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 05:43:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 05:43:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 05:43:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 05:43:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 05:43:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 05:43:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 05:43:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 05:43:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 05:43:23,349 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 05:43:23,349 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 05:43:23,349 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 05:43:23,349 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 05:43:23,349 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 05:43:23,349 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 05:43:23,349 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 05:43:23,349 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 05:43:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 05:43:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 05:43:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 05:43:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 05:43:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 05:43:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 05:43:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 05:43:23,351 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 05:43:23,351 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 05:43:23,351 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 05:43:23,351 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 05:43:23,351 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 05:43:23,351 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:43:23,351 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 05:43:23,352 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:43:23,352 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 05:43:23,352 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 05:43:23,352 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 05:43:23,352 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 05:43:23,352 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 05:43:23,352 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 05:43:23,353 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 05:43:23,353 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 05:43:23,353 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 05:43:23,353 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 05:43:23,353 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 05:43:23,353 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 05:43:23,353 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 05:43:23,354 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 05:43:23,354 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 05:43:23,354 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 05:43:23,354 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 05:43:23,354 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 05:43:23,354 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 05:43:23,354 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 05:43:23,354 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 05:43:23,355 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 05:43:23,355 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 05:43:23,355 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 05:43:23,355 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 05:43:23,355 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 05:43:23,355 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 05:43:23,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 05:43:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 05:43:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 05:43:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 05:43:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 05:43:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 05:43:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 05:43:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 05:43:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 05:43:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 05:43:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 05:43:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 05:43:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 05:43:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 05:43:23,358 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 05:43:23,358 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 05:43:23,358 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 05:43:23,358 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 05:43:23,358 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 05:43:23,358 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 05:43:23,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:43:23,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:43:23,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 05:43:23,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 05:43:23,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:43:23,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:43:23,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-27 05:43:23,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:43:23,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 05:43:23,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-27 05:43:23,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-27 05:43:24,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:43:24,189 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-27 05:43:24,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:43:24 BoogieIcfgContainer [2021-08-27 05:43:24,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:43:24,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:43:24,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:43:24,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:43:24,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:43:22" (1/3) ... [2021-08-27 05:43:24,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa31fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:43:24, skipping insertion in model container [2021-08-27 05:43:24,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:43:23" (2/3) ... [2021-08-27 05:43:24,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa31fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:43:24, skipping insertion in model container [2021-08-27 05:43:24,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:43:24" (3/3) ... [2021-08-27 05:43:24,196 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_of_cslls.i [2021-08-27 05:43:24,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:43:24,200 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 104 error locations. [2021-08-27 05:43:24,237 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:43:24,242 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 05:43:24,242 INFO L340 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2021-08-27 05:43:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 99 states have (on average 2.272727272727273) internal successors, (225), 203 states have internal predecessors, (225), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:43:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 05:43:24,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:43:24,266 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:43:24,266 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:43:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:43:24,270 INFO L82 PathProgramCache]: Analyzing trace with hash 912788519, now seen corresponding path program 1 times [2021-08-27 05:43:24,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:43:24,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250355967] [2021-08-27 05:43:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:43:24,278 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:43:24,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:43:24,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:43:24,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-27 05:43:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:43:24,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 05:43:24,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:43:24,484 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:43:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:24,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:43:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:24,537 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:43:24,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250355967] [2021-08-27 05:43:24,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250355967] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:43:24,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:43:24,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-27 05:43:24,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961324414] [2021-08-27 05:43:24,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 05:43:24,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:43:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 05:43:24,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:43:24,556 INFO L87 Difference]: Start difference. First operand has 208 states, 99 states have (on average 2.272727272727273) internal successors, (225), 203 states have internal predecessors, (225), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:43:24,908 INFO L93 Difference]: Finished difference Result 279 states and 300 transitions. [2021-08-27 05:43:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 05:43:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 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 7 [2021-08-27 05:43:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:43:24,919 INFO L225 Difference]: With dead ends: 279 [2021-08-27 05:43:24,919 INFO L226 Difference]: Without dead ends: 275 [2021-08-27 05:43:24,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:43:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-27 05:43:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 196. [2021-08-27 05:43:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 192 states have internal predecessors, (207), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 210 transitions. [2021-08-27 05:43:24,951 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 210 transitions. Word has length 7 [2021-08-27 05:43:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:43:24,952 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 210 transitions. [2021-08-27 05:43:24,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 210 transitions. [2021-08-27 05:43:24,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 05:43:24,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:43:24,953 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:43:24,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-27 05:43:25,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:43:25,160 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:43:25,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:43:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash 912788520, now seen corresponding path program 1 times [2021-08-27 05:43:25,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:43:25,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16868443] [2021-08-27 05:43:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:43:25,161 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:43:25,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:43:25,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:43:25,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-27 05:43:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:43:25,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 05:43:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:43:25,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:43:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:25,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:43:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:25,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:43:25,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16868443] [2021-08-27 05:43:25,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16868443] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:43:25,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:43:25,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-27 05:43:25,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630511808] [2021-08-27 05:43:25,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:43:25,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:43:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:43:25,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:43:25,421 INFO L87 Difference]: Start difference. First operand 196 states and 210 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:43:26,128 INFO L93 Difference]: Finished difference Result 310 states and 337 transitions. [2021-08-27 05:43:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:43:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 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 7 [2021-08-27 05:43:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:43:26,130 INFO L225 Difference]: With dead ends: 310 [2021-08-27 05:43:26,130 INFO L226 Difference]: Without dead ends: 310 [2021-08-27 05:43:26,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:43:26,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-08-27 05:43:26,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 194. [2021-08-27 05:43:26,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 190 states have internal predecessors, (205), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 208 transitions. [2021-08-27 05:43:26,138 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 208 transitions. Word has length 7 [2021-08-27 05:43:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:43:26,138 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 208 transitions. [2021-08-27 05:43:26,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:26,138 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 208 transitions. [2021-08-27 05:43:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 05:43:26,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:43:26,138 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:43:26,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-27 05:43:26,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:43:26,368 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:43:26,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:43:26,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1444829574, now seen corresponding path program 1 times [2021-08-27 05:43:26,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:43:26,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278505639] [2021-08-27 05:43:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:43:26,370 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:43:26,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:43:26,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:43:26,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-27 05:43:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:43:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 05:43:26,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:43:26,556 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:43:26,561 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:43:26,657 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 05:43:26,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-08-27 05:43:26,666 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 05:43:26,667 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 24 [2021-08-27 05:43:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:26,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:43:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:29,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:43:29,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278505639] [2021-08-27 05:43:29,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278505639] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:43:29,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:43:29,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-27 05:43:29,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255232014] [2021-08-27 05:43:29,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:43:29,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:43:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:43:29,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-08-27 05:43:29,046 INFO L87 Difference]: Start difference. First operand 194 states and 208 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:43:30,154 INFO L93 Difference]: Finished difference Result 351 states and 377 transitions. [2021-08-27 05:43:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:43:30,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 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 10 [2021-08-27 05:43:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:43:30,156 INFO L225 Difference]: With dead ends: 351 [2021-08-27 05:43:30,156 INFO L226 Difference]: Without dead ends: 351 [2021-08-27 05:43:30,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2187.9ms TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-08-27 05:43:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-27 05:43:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 187. [2021-08-27 05:43:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 98 states have (on average 2.020408163265306) internal successors, (198), 183 states have internal predecessors, (198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 201 transitions. [2021-08-27 05:43:30,162 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 201 transitions. Word has length 10 [2021-08-27 05:43:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:43:30,162 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 201 transitions. [2021-08-27 05:43:30,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:30,162 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 201 transitions. [2021-08-27 05:43:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 05:43:30,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:43:30,162 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:43:30,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-27 05:43:30,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:43:30,370 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:43:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:43:30,371 INFO L82 PathProgramCache]: Analyzing trace with hash 77891529, now seen corresponding path program 1 times [2021-08-27 05:43:30,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:43:30,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427221814] [2021-08-27 05:43:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:43:30,371 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:43:30,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:43:30,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:43:30,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-27 05:43:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:43:30,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 05:43:30,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:43:30,553 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:43:30,575 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 22 treesize of output 18 [2021-08-27 05:43:30,619 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 12 [2021-08-27 05:43:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:30,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:43:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:30,699 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:43:30,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427221814] [2021-08-27 05:43:30,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427221814] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:43:30,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:43:30,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-27 05:43:30,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935669072] [2021-08-27 05:43:30,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:43:30,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:43:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:43:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:43:30,700 INFO L87 Difference]: Start difference. First operand 187 states and 201 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:31,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:43:31,255 INFO L93 Difference]: Finished difference Result 186 states and 200 transitions. [2021-08-27 05:43:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:43:31,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 05:43:31,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:43:31,256 INFO L225 Difference]: With dead ends: 186 [2021-08-27 05:43:31,257 INFO L226 Difference]: Without dead ends: 186 [2021-08-27 05:43:31,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:43:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-27 05:43:31,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-08-27 05:43:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 98 states have (on average 2.010204081632653) internal successors, (197), 182 states have internal predecessors, (197), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 200 transitions. [2021-08-27 05:43:31,260 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 200 transitions. Word has length 14 [2021-08-27 05:43:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:43:31,260 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 200 transitions. [2021-08-27 05:43:31,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 200 transitions. [2021-08-27 05:43:31,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 05:43:31,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:43:31,261 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:43:31,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-27 05:43:31,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:43:31,468 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:43:31,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:43:31,468 INFO L82 PathProgramCache]: Analyzing trace with hash 77891530, now seen corresponding path program 1 times [2021-08-27 05:43:31,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:43:31,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68850850] [2021-08-27 05:43:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:43:31,468 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:43:31,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:43:31,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:43:31,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-27 05:43:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:43:31,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 05:43:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:43:31,633 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:43:31,653 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 13 treesize of output 9 [2021-08-27 05:43:31,668 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 19 treesize of output 15 [2021-08-27 05:43:31,714 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 27 [2021-08-27 05:43:31,717 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 12 [2021-08-27 05:43:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:31,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:43:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:31,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:43:31,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68850850] [2021-08-27 05:43:31,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68850850] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:43:31,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:43:31,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-08-27 05:43:31,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081882973] [2021-08-27 05:43:31,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:43:31,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:43:31,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:43:31,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:43:31,934 INFO L87 Difference]: Start difference. First operand 186 states and 200 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:43:33,406 INFO L93 Difference]: Finished difference Result 185 states and 199 transitions. [2021-08-27 05:43:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:43:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 05:43:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:43:33,408 INFO L225 Difference]: With dead ends: 185 [2021-08-27 05:43:33,408 INFO L226 Difference]: Without dead ends: 185 [2021-08-27 05:43:33,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:43:33,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-08-27 05:43:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-08-27 05:43:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 98 states have (on average 2.0) internal successors, (196), 181 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 199 transitions. [2021-08-27 05:43:33,413 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 199 transitions. Word has length 14 [2021-08-27 05:43:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:43:33,413 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 199 transitions. [2021-08-27 05:43:33,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:43:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 199 transitions. [2021-08-27 05:43:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 05:43:33,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:43:33,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:43:33,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-27 05:43:33,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:43:33,614 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:43:33,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:43:33,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1943616171, now seen corresponding path program 1 times [2021-08-27 05:43:33,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:43:33,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630202598] [2021-08-27 05:43:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:43:33,615 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:43:33,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:43:33,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:43:33,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-27 05:43:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:43:33,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 05:43:33,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:43:33,828 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:43:33,879 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-27 05:43:33,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-08-27 05:43:33,943 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 [2021-08-27 05:43:34,145 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:43:34,145 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 1 case distinctions, treesize of input 49 treesize of output 33 [2021-08-27 05:43:34,241 INFO L354 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2021-08-27 05:43:34,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 71 [2021-08-27 05:43:34,342 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 84 treesize of output 60 [2021-08-27 05:43:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:43:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:43:59,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:43:59,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630202598] [2021-08-27 05:43:59,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630202598] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:43:59,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:43:59,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 14 [2021-08-27 05:43:59,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692746463] [2021-08-27 05:43:59,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 05:43:59,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:43:59,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 05:43:59,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=146, Unknown=11, NotChecked=0, Total=210 [2021-08-27 05:43:59,991 INFO L87 Difference]: Start difference. First operand 185 states and 199 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:44:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:44:05,403 INFO L93 Difference]: Finished difference Result 345 states and 377 transitions. [2021-08-27 05:44:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:44:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 1 states have call successors, (2), 1 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 18 [2021-08-27 05:44:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:44:05,404 INFO L225 Difference]: With dead ends: 345 [2021-08-27 05:44:05,404 INFO L226 Difference]: Without dead ends: 345 [2021-08-27 05:44:05,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 28537.9ms TimeCoverageRelationStatistics Valid=88, Invalid=243, Unknown=11, NotChecked=0, Total=342 [2021-08-27 05:44:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-27 05:44:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 188. [2021-08-27 05:44:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 101 states have (on average 1.99009900990099) internal successors, (201), 184 states have internal predecessors, (201), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:44:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 204 transitions. [2021-08-27 05:44:05,408 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 204 transitions. Word has length 18 [2021-08-27 05:44:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:44:05,408 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 204 transitions. [2021-08-27 05:44:05,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:44:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 204 transitions. [2021-08-27 05:44:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 05:44:05,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:44:05,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:44:05,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-27 05:44:05,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:44:05,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 99 more)] === [2021-08-27 05:44:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:44:05,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1943616170, now seen corresponding path program 1 times [2021-08-27 05:44:05,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:44:05,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925321227] [2021-08-27 05:44:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:44:05,618 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:44:05,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:44:05,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:44:05,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-27 05:44:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:44:05,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 05:44:05,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:44:05,830 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:44:05,889 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-27 05:44:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-08-27 05:44:05,904 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 6 treesize of output 5 [2021-08-27 05:44:05,940 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 31 treesize of output 27 [2021-08-27 05:44:05,952 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 13 treesize of output 9 [2021-08-27 05:44:06,158 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:44:06,158 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 1 case distinctions, treesize of input 91 treesize of output 57 [2021-08-27 05:44:06,175 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:44:06,175 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 68 treesize of output 61 [2021-08-27 05:44:06,251 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-08-27 05:44:06,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 56 [2021-08-27 05:44:06,275 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-08-27 05:44:06,275 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 53 treesize of output 55 [2021-08-27 05:44:06,338 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 48 [2021-08-27 05:44:06,341 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 45 treesize of output 29 [2021-08-27 05:44:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:44:06,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:44:08,511 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~tmpList~0.base_25 (_ BitVec 32))) (or (let ((.cse1 (bvadd (_ bv8 32) c_main_~tree~0.offset))) (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| c_main_~tree~0.base) .cse1))) (let ((.cse0 (bvadd (_ bv4 32) .cse2))) (and (bvule .cse0 (select (store |c_#length| v_main_~tmpList~0.base_25 (_ bv4 32)) (select (select |c_#memory_$Pointer$.base| c_main_~tree~0.base) .cse1))) (bvule .cse2 .cse0))))) (not (= (_ bv0 1) (select |c_#valid| v_main_~tmpList~0.base_25))))) is different from false [2021-08-27 05:44:20,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:44:20,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925321227] [2021-08-27 05:44:20,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 05:44:20,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1987172758] [2021-08-27 05:44:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:44:20,921 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-27 05:44:20,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-27 05:44:20,923 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-27 05:44:20,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-08-27 05:44:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:44:21,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 05:44:21,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:44:21,332 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:44:21,475 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-27 05:44:21,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-08-27 05:44:21,508 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 6 treesize of output 5 [2021-08-27 05:44:21,552 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 31 treesize of output 27 [2021-08-27 05:44:21,602 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 13 treesize of output 9 [2021-08-27 05:44:21,892 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:44:21,893 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 1 case distinctions, treesize of input 91 treesize of output 57 [2021-08-27 05:44:21,948 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:44:21,948 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 68 treesize of output 61 [2021-08-27 05:44:22,166 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-08-27 05:44:22,166 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 57 treesize of output 59 [2021-08-27 05:44:22,229 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-08-27 05:44:22,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-08-27 05:44:22,313 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 48 [2021-08-27 05:44:22,320 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 45 treesize of output 29 [2021-08-27 05:44:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:44:22,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:44:27,518 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~tmpList~0.base_26 (_ BitVec 32))) (or (and (forall ((|main_#t~mem7.offset| (_ BitVec 32)) (|main_#t~mem8.base| (_ BitVec 32)) (|main_#t~mem8.offset| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv8 32) c_main_~tree~0.offset))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base|) |main_#t~mem7.offset| |main_#t~mem8.offset|)) c_main_~tree~0.base) .cse0)) (select (store |c_#length| v_main_~tmpList~0.base_26 (_ bv4 32)) (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem7.base|) |main_#t~mem7.offset| |main_#t~mem8.base|)) c_main_~tree~0.base) .cse0))))) (forall ((|main_#t~mem7.offset| (_ BitVec 32)) (|main_#t~mem8.offset| (_ BitVec 32))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem7.base|) |main_#t~mem7.offset| |main_#t~mem8.offset|)) c_main_~tree~0.base) (bvadd (_ bv8 32) c_main_~tree~0.offset)))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_main_~tmpList~0.base_26)))))) is different from false [2021-08-27 05:44:38,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 05:44:38,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959219914] [2021-08-27 05:44:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:44:38,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:44:38,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:44:38,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:44:38,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 05:44:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:44:39,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-27 05:44:39,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:44:39,165 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:44:43,161 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:44:43,161 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 16 treesize of output 16 [2021-08-27 05:44:43,189 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 6 treesize of output 5 [2021-08-27 05:44:43,343 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 13 treesize of output 9 [2021-08-27 05:44:43,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 05:44:45,946 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 05:44:45,946 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 1 case distinctions, treesize of input 92 treesize of output 58 [2021-08-27 05:44:46,007 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-27 05:44:46,008 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 69 treesize of output 62 [2021-08-27 05:44:46,293 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-08-27 05:44:46,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-08-27 05:44:46,329 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-08-27 05:44:46,330 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 1 case distinctions, treesize of input 37 treesize of output 37 [2021-08-27 05:44:46,524 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 64 treesize of output 40 [2021-08-27 05:44:46,533 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 37 treesize of output 25 [2021-08-27 05:44:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:44:46,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:44:49,787 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-27 05:44:49,787 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 89 treesize of output 88 [2021-08-27 05:45:30,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 05:45:30,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:45:30,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-27 05:45:30,215 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-27 05:45:30,215 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-27 05:45:30,218 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-08-27 05:45:30,219 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:45:30,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:45:30,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 05:45:30,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 05:45:30,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 05:45:30,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 05:45:30,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-08-27 05:45:30,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 05:45:30,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 05:45:30,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-08-27 05:45:30,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-08-27 05:45:30,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-08-27 05:45:30,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-08-27 05:45:30,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-08-27 05:45:30,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-08-27 05:45:30,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-08-27 05:45:30,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-08-27 05:45:30,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-08-27 05:45:30,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-08-27 05:45:30,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-08-27 05:45:30,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-08-27 05:45:30,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-08-27 05:45:30,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-08-27 05:45:30,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-08-27 05:45:30,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-08-27 05:45:30,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-08-27 05:45:30,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-08-27 05:45:30,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-08-27 05:45:30,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-08-27 05:45:30,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-08-27 05:45:30,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-08-27 05:45:30,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-08-27 05:45:30,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-08-27 05:45:30,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-08-27 05:45:30,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-08-27 05:45:30,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-08-27 05:45:30,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-08-27 05:45:30,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-08-27 05:45:30,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-08-27 05:45:30,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-08-27 05:45:30,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-08-27 05:45:30,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-08-27 05:45:30,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-08-27 05:45:30,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44REQUIRES_VIOLATION [2021-08-27 05:45:30,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45REQUIRES_VIOLATION [2021-08-27 05:45:30,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION [2021-08-27 05:45:30,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-08-27 05:45:30,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-08-27 05:45:30,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION [2021-08-27 05:45:30,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50REQUIRES_VIOLATION [2021-08-27 05:45:30,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION [2021-08-27 05:45:30,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-08-27 05:45:30,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53REQUIRES_VIOLATION [2021-08-27 05:45:30,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION [2021-08-27 05:45:30,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55REQUIRES_VIOLATION [2021-08-27 05:45:30,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56REQUIRES_VIOLATION [2021-08-27 05:45:30,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57REQUIRES_VIOLATION [2021-08-27 05:45:30,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58REQUIRES_VIOLATION [2021-08-27 05:45:30,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59REQUIRES_VIOLATION [2021-08-27 05:45:30,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr60REQUIRES_VIOLATION [2021-08-27 05:45:30,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr61REQUIRES_VIOLATION [2021-08-27 05:45:30,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr62REQUIRES_VIOLATION [2021-08-27 05:45:30,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr63REQUIRES_VIOLATION [2021-08-27 05:45:30,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr64REQUIRES_VIOLATION [2021-08-27 05:45:30,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr65REQUIRES_VIOLATION [2021-08-27 05:45:30,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr66REQUIRES_VIOLATION [2021-08-27 05:45:30,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr67REQUIRES_VIOLATION [2021-08-27 05:45:30,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr68REQUIRES_VIOLATION [2021-08-27 05:45:30,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr69REQUIRES_VIOLATION [2021-08-27 05:45:30,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr70REQUIRES_VIOLATION [2021-08-27 05:45:30,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr71REQUIRES_VIOLATION [2021-08-27 05:45:30,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr72REQUIRES_VIOLATION [2021-08-27 05:45:30,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr73REQUIRES_VIOLATION [2021-08-27 05:45:30,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr74REQUIRES_VIOLATION [2021-08-27 05:45:30,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr75REQUIRES_VIOLATION [2021-08-27 05:45:30,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr76REQUIRES_VIOLATION [2021-08-27 05:45:30,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr77REQUIRES_VIOLATION [2021-08-27 05:45:30,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr78REQUIRES_VIOLATION [2021-08-27 05:45:30,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr79REQUIRES_VIOLATION [2021-08-27 05:45:30,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr80REQUIRES_VIOLATION [2021-08-27 05:45:30,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr81REQUIRES_VIOLATION [2021-08-27 05:45:30,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr82REQUIRES_VIOLATION [2021-08-27 05:45:30,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr83REQUIRES_VIOLATION [2021-08-27 05:45:30,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr84REQUIRES_VIOLATION [2021-08-27 05:45:30,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr85REQUIRES_VIOLATION [2021-08-27 05:45:30,230 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr86REQUIRES_VIOLATION [2021-08-27 05:45:30,230 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr87REQUIRES_VIOLATION [2021-08-27 05:45:30,230 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr88REQUIRES_VIOLATION [2021-08-27 05:45:30,230 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr89REQUIRES_VIOLATION [2021-08-27 05:45:30,230 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr90REQUIRES_VIOLATION [2021-08-27 05:45:30,230 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr91REQUIRES_VIOLATION [2021-08-27 05:45:30,230 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr92ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:45:30,231 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr93ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:45:30,231 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr94ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:45:30,231 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr95REQUIRES_VIOLATION [2021-08-27 05:45:30,231 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr96REQUIRES_VIOLATION [2021-08-27 05:45:30,231 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr97ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:45:30,231 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr98ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:45:30,231 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr99ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:45:30,231 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr100ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:45:30,232 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr101ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:45:30,232 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr102ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:45:30,232 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr103ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:45:30,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-08-27 05:45:30,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-27 05:45:30,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 05:45:30,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:45:30,863 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:45:30,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:45:30 BoogieIcfgContainer [2021-08-27 05:45:30,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:45:30,870 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:45:30,870 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:45:30,870 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:45:30,870 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:43:24" (3/4) ... [2021-08-27 05:45:30,872 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 05:45:30,872 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:45:30,905 INFO L168 Benchmark]: Toolchain (without parser) took 128149.78 ms. Allocated memory was 69.2 MB in the beginning and 184.5 MB in the end (delta: 115.3 MB). Free memory was 49.7 MB in the beginning and 139.3 MB in the end (delta: -89.6 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. [2021-08-27 05:45:30,906 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 69.2 MB. Free memory was 52.5 MB in the beginning and 52.4 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:45:30,906 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.11 ms. Allocated memory is still 69.2 MB. Free memory was 49.5 MB in the beginning and 46.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2021-08-27 05:45:30,906 INFO L168 Benchmark]: Boogie Preprocessor took 120.04 ms. Allocated memory is still 69.2 MB. Free memory was 46.6 MB in the beginning and 43.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:45:30,908 INFO L168 Benchmark]: RCFGBuilder took 932.60 ms. Allocated memory was 69.2 MB in the beginning and 109.1 MB in the end (delta: 39.8 MB). Free memory was 43.0 MB in the beginning and 85.1 MB in the end (delta: -42.1 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-08-27 05:45:30,908 INFO L168 Benchmark]: TraceAbstraction took 126677.89 ms. Allocated memory was 109.1 MB in the beginning and 184.5 MB in the end (delta: 75.5 MB). Free memory was 84.7 MB in the beginning and 139.3 MB in the end (delta: -54.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.1 GB. [2021-08-27 05:45:30,910 INFO L168 Benchmark]: Witness Printer took 2.27 ms. Allocated memory is still 184.5 MB. Free memory is still 139.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:45:30,910 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 69.2 MB. Free memory was 52.5 MB in the beginning and 52.4 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 411.11 ms. Allocated memory is still 69.2 MB. Free memory was 49.5 MB in the beginning and 46.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 120.04 ms. Allocated memory is still 69.2 MB. Free memory was 46.6 MB in the beginning and 43.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 932.60 ms. Allocated memory was 69.2 MB in the beginning and 109.1 MB in the end (delta: 39.8 MB). Free memory was 43.0 MB in the beginning and 85.1 MB in the end (delta: -42.1 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 126677.89 ms. Allocated memory was 109.1 MB in the beginning and 184.5 MB in the end (delta: 75.5 MB). Free memory was 84.7 MB in the beginning and 139.3 MB in the end (delta: -54.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.1 GB. * Witness Printer took 2.27 ms. Allocated memory is still 184.5 MB. Free memory is still 139.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L536] TreeNode* tree = malloc(sizeof(*tree)); [L537] TreeNode* tmp; [L538] ListNode* tmpList; [L539] tree->left = ((void *)0) [L540] tree->right = ((void *)0) [L541] tree->list = malloc(sizeof(ListNode)) [L542] EXPR tree->list [L542] EXPR tree->list [L542] tree->list->next = tree->list [L543] COND TRUE __VERIFIER_nondet_int() [L545] tmpList = malloc(sizeof(ListNode)) [L546] EXPR tree->list [L546] tree->list->next - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 569]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 569]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 613]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 613]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 627]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 627]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 627]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 232 locations, 104 error locations. Started 1 CEGAR loops. OverallTime: 126626.5ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 12.6ms, AutomataDifference: 9642.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 987 SDtfs, 1143 SDslu, 2176 SDs, 0 SdLazy, 2638 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5337.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 30977.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=0, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.7ms AutomataMinimizationTime, 6 MinimizatonAttempts, 516 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 72.6ms SsaConstructionTime, 142.7ms SatisfiabilityAnalysisTime, 29447.1ms InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 128 ConstructedInterpolants, 23 QuantifiedInterpolants, 1488 SizeOfPredicates, 25 NumberOfNonLiveVariables, 503 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-27 05:45:30,989 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 0 Received shutdown request...