./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY --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 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:44:31,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:44:31,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:44:31,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:44:31,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:44:31,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:44:31,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:44:31,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:44:31,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:44:31,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:44:31,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:44:31,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:44:31,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:44:31,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:44:31,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:44:31,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:44:31,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:44:31,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:44:31,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:44:31,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:44:31,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:44:31,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:44:31,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:44:31,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:44:31,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:44:31,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:44:31,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:44:31,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:44:31,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:44:31,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:44:31,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:44:31,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:44:31,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:44:31,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:44:31,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:44:31,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:44:31,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:44:31,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:44:31,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:44:31,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:44:31,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:44:31,709 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 07:44:31,756 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:44:31,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:44:31,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:44:31,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:44:31,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:44:31,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:44:31,759 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:44:31,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:44:31,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:44:31,760 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:44:31,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:44:31,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:44:31,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:44:31,762 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:44:31,762 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:44:31,762 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:44:31,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:44:31,763 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:44:31,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:44:31,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:44:31,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:44:31,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:44:31,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:44:31,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:44:31,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:44:31,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:44:31,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:44:31,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:44:31,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:44:31,767 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 [2021-11-07 07:44:32,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:44:32,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:44:32,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:44:32,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:44:32,065 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:44:32,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2021-11-07 07:44:32,162 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/data/b4d9e4763/172174626c444d85b5df1d13d9d7fc00/FLAG4a268d5b2 [2021-11-07 07:44:32,764 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:44:32,765 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2021-11-07 07:44:32,783 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/data/b4d9e4763/172174626c444d85b5df1d13d9d7fc00/FLAG4a268d5b2 [2021-11-07 07:44:33,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/data/b4d9e4763/172174626c444d85b5df1d13d9d7fc00 [2021-11-07 07:44:33,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:44:33,083 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:44:33,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:44:33,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:44:33,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:44:33,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:44:33" (1/1) ... [2021-11-07 07:44:33,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d6a7284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33, skipping insertion in model container [2021-11-07 07:44:33,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:44:33" (1/1) ... [2021-11-07 07:44:33,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:44:33,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:44:33,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:44:33,645 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:44:33,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:44:33,757 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:44:33,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33 WrapperNode [2021-11-07 07:44:33,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:44:33,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:44:33,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:44:33,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:44:33,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33" (1/1) ... [2021-11-07 07:44:33,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33" (1/1) ... [2021-11-07 07:44:33,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33" (1/1) ... [2021-11-07 07:44:33,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33" (1/1) ... [2021-11-07 07:44:33,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33" (1/1) ... [2021-11-07 07:44:33,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33" (1/1) ... [2021-11-07 07:44:33,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33" (1/1) ... [2021-11-07 07:44:33,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:44:33,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:44:33,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:44:33,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:44:33,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33" (1/1) ... [2021-11-07 07:44:33,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:44:33,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:33,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:44:33,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:44:33,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 07:44:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:44:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 07:44:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 07:44:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 07:44:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-07 07:44:33,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 07:44:33,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 07:44:33,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 07:44:33,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 07:44:33,967 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 07:44:33,967 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 07:44:33,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:44:33,967 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 07:44:33,967 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 07:44:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 07:44:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 07:44:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 07:44:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 07:44:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 07:44:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 07:44:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 07:44:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 07:44:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 07:44:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 07:44:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 07:44:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 07:44:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 07:44:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 07:44:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 07:44:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 07:44:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 07:44:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 07:44:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 07:44:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 07:44:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 07:44:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 07:44:33,972 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 07:44:33,972 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 07:44:33,972 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 07:44:33,972 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 07:44:33,972 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 07:44:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 07:44:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 07:44:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 07:44:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 07:44:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 07:44:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 07:44:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 07:44:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 07:44:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 07:44:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 07:44:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 07:44:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 07:44:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 07:44:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 07:44:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 07:44:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 07:44:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 07:44:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 07:44:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 07:44:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 07:44:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 07:44:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 07:44:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 07:44:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 07:44:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 07:44:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 07:44:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 07:44:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-07 07:44:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 07:44:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 07:44:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 07:44:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 07:44:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 07:44:33,979 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 07:44:33,979 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 07:44:33,979 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 07:44:33,979 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 07:44:33,979 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 07:44:33,980 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 07:44:33,980 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 07:44:33,980 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 07:44:33,980 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 07:44:33,980 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 07:44:33,980 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 07:44:33,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 07:44:33,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 07:44:33,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 07:44:33,981 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 07:44:33,981 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 07:44:33,981 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 07:44:33,982 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 07:44:33,982 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 07:44:33,982 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 07:44:33,982 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 07:44:33,982 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 07:44:33,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 07:44:33,983 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 07:44:33,983 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 07:44:33,983 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 07:44:33,983 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 07:44:33,983 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 07:44:33,983 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 07:44:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 07:44:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 07:44:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 07:44:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 07:44:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 07:44:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 07:44:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 07:44:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 07:44:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 07:44:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 07:44:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 07:44:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 07:44:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 07:44:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-07 07:44:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 07:44:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-07 07:44:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:44:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:44:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 07:44:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 07:44:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 07:44:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:44:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 07:44:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:44:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:44:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:44:34,687 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:44:34,687 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 07:44:34,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:44:34 BoogieIcfgContainer [2021-11-07 07:44:34,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:44:34,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:44:34,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:44:34,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:44:34,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:44:33" (1/3) ... [2021-11-07 07:44:34,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b60ef99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:44:34, skipping insertion in model container [2021-11-07 07:44:34,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:33" (2/3) ... [2021-11-07 07:44:34,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b60ef99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:44:34, skipping insertion in model container [2021-11-07 07:44:34,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:44:34" (3/3) ... [2021-11-07 07:44:34,702 INFO L111 eAbstractionObserver]: Analyzing ICFG length_test03-1.i [2021-11-07 07:44:34,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:44:34,710 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-11-07 07:44:34,762 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:44:34,768 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, mAutomataTypeConcurrency=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 [2021-11-07 07:44:34,769 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-11-07 07:44:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 125 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:44:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 07:44:34,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:34,795 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:34,796 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:34,802 INFO L85 PathProgramCache]: Analyzing trace with hash -127170297, now seen corresponding path program 1 times [2021-11-07 07:44:34,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:34,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078641579] [2021-11-07 07:44:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:34,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:35,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:35,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:35,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078641579] [2021-11-07 07:44:35,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078641579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:35,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:35,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:44:35,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303198617] [2021-11-07 07:44:35,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:44:35,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:35,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:44:35,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:35,194 INFO L87 Difference]: Start difference. First operand has 133 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 125 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2021-11-07 07:44:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:35,689 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2021-11-07 07:44:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:44:35,691 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 [2021-11-07 07:44:35,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:35,714 INFO L225 Difference]: With dead ends: 170 [2021-11-07 07:44:35,714 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 07:44:35,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 07:44:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2021-11-07 07:44:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 121 states have internal predecessors, (127), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2021-11-07 07:44:35,797 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 7 [2021-11-07 07:44:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:35,801 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2021-11-07 07:44:35,801 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) [2021-11-07 07:44:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2021-11-07 07:44:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 07:44:35,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:35,803 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:35,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:44:35,803 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash -127170296, now seen corresponding path program 1 times [2021-11-07 07:44:35,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:35,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055323082] [2021-11-07 07:44:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:35,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:35,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:35,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:35,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055323082] [2021-11-07 07:44:35,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055323082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:35,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:35,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:44:35,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953713467] [2021-11-07 07:44:35,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:44:35,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:44:35,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:35,955 INFO L87 Difference]: Start difference. First operand 128 states and 134 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) [2021-11-07 07:44:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:36,247 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-11-07 07:44:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:44:36,248 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 [2021-11-07 07:44:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:36,253 INFO L225 Difference]: With dead ends: 128 [2021-11-07 07:44:36,253 INFO L226 Difference]: Without dead ends: 128 [2021-11-07 07:44:36,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-07 07:44:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-11-07 07:44:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 119 states have internal predecessors, (125), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2021-11-07 07:44:36,288 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 7 [2021-11-07 07:44:36,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:36,289 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2021-11-07 07:44:36,289 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) [2021-11-07 07:44:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2021-11-07 07:44:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:44:36,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:36,291 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:36,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:44:36,291 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:36,292 INFO L85 PathProgramCache]: Analyzing trace with hash -369177653, now seen corresponding path program 1 times [2021-11-07 07:44:36,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:36,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546666465] [2021-11-07 07:44:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:36,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:36,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:36,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:36,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546666465] [2021-11-07 07:44:36,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546666465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:36,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:36,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:44:36,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556863417] [2021-11-07 07:44:36,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:44:36,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:44:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:36,396 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-11-07 07:44:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:36,664 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2021-11-07 07:44:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:44:36,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2021-11-07 07:44:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:36,667 INFO L225 Difference]: With dead ends: 143 [2021-11-07 07:44:36,667 INFO L226 Difference]: Without dead ends: 143 [2021-11-07 07:44:36,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-07 07:44:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2021-11-07 07:44:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.8714285714285714) internal successors, (131), 122 states have internal predecessors, (131), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2021-11-07 07:44:36,682 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 10 [2021-11-07 07:44:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:36,682 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2021-11-07 07:44:36,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-11-07 07:44:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2021-11-07 07:44:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:44:36,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:36,686 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:36,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:44:36,687 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:36,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash -369177652, now seen corresponding path program 1 times [2021-11-07 07:44:36,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:36,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479042296] [2021-11-07 07:44:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:36,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:36,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:36,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:36,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479042296] [2021-11-07 07:44:36,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479042296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:36,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:36,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:44:36,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600034738] [2021-11-07 07:44:36,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:44:36,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:44:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:36,832 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-11-07 07:44:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:37,095 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-11-07 07:44:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:44:37,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2021-11-07 07:44:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:37,097 INFO L225 Difference]: With dead ends: 129 [2021-11-07 07:44:37,098 INFO L226 Difference]: Without dead ends: 129 [2021-11-07 07:44:37,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-07 07:44:37,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2021-11-07 07:44:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 70 states have (on average 1.8428571428571427) internal successors, (129), 120 states have internal predecessors, (129), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2021-11-07 07:44:37,107 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 10 [2021-11-07 07:44:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:37,108 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2021-11-07 07:44:37,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-11-07 07:44:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2021-11-07 07:44:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:44:37,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:37,110 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:37,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:44:37,110 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:37,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1763722802, now seen corresponding path program 1 times [2021-11-07 07:44:37,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:37,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958447949] [2021-11-07 07:44:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:37,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:37,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:37,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:37,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958447949] [2021-11-07 07:44:37,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958447949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:37,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:37,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:44:37,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207748551] [2021-11-07 07:44:37,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:44:37,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:37,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:44:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:37,195 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-07 07:44:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:37,459 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2021-11-07 07:44:37,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:44:37,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2021-11-07 07:44:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:37,461 INFO L225 Difference]: With dead ends: 122 [2021-11-07 07:44:37,462 INFO L226 Difference]: Without dead ends: 122 [2021-11-07 07:44:37,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-07 07:44:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-07 07:44:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 70 states have (on average 1.7714285714285714) internal successors, (124), 115 states have internal predecessors, (124), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2021-11-07 07:44:37,470 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 16 [2021-11-07 07:44:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:37,470 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2021-11-07 07:44:37,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-07 07:44:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2021-11-07 07:44:37,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:44:37,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:37,472 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:37,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:44:37,473 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:37,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1763722803, now seen corresponding path program 1 times [2021-11-07 07:44:37,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:37,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727133018] [2021-11-07 07:44:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:37,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:37,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:37,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:37,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727133018] [2021-11-07 07:44:37,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727133018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:37,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:37,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:44:37,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529725041] [2021-11-07 07:44:37,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:44:37,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:44:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:37,558 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-07 07:44:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:37,814 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2021-11-07 07:44:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:44:37,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2021-11-07 07:44:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:37,818 INFO L225 Difference]: With dead ends: 117 [2021-11-07 07:44:37,818 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 07:44:37,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:44:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 07:44:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-07 07:44:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 70 states have (on average 1.7) internal successors, (119), 110 states have internal predecessors, (119), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2021-11-07 07:44:37,828 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 16 [2021-11-07 07:44:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:37,829 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2021-11-07 07:44:37,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-07 07:44:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2021-11-07 07:44:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:44:37,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:37,830 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:37,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:44:37,831 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:37,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1159167875, now seen corresponding path program 1 times [2021-11-07 07:44:37,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:37,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456125067] [2021-11-07 07:44:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:37,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:38,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:38,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:38,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456125067] [2021-11-07 07:44:38,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456125067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:38,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:38,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:44:38,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341690659] [2021-11-07 07:44:38,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:44:38,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:38,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:44:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:44:38,056 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:44:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:38,609 INFO L93 Difference]: Finished difference Result 227 states and 244 transitions. [2021-11-07 07:44:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:44:38,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-07 07:44:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:38,613 INFO L225 Difference]: With dead ends: 227 [2021-11-07 07:44:38,613 INFO L226 Difference]: Without dead ends: 227 [2021-11-07 07:44:38,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:44:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-07 07:44:38,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 151. [2021-11-07 07:44:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 109 states have (on average 1.6238532110091743) internal successors, (177), 143 states have internal predecessors, (177), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 184 transitions. [2021-11-07 07:44:38,626 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 184 transitions. Word has length 17 [2021-11-07 07:44:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:38,626 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 184 transitions. [2021-11-07 07:44:38,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:44:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 184 transitions. [2021-11-07 07:44:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:44:38,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:38,628 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:38,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:44:38,630 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:38,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1159167874, now seen corresponding path program 1 times [2021-11-07 07:44:38,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:38,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636633868] [2021-11-07 07:44:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:38,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:38,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:38,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:38,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636633868] [2021-11-07 07:44:38,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636633868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:38,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:38,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:44:38,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546900034] [2021-11-07 07:44:38,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:44:38,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:38,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:44:38,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:44:38,920 INFO L87 Difference]: Start difference. First operand 151 states and 184 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:44:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:39,345 INFO L93 Difference]: Finished difference Result 177 states and 212 transitions. [2021-11-07 07:44:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:44:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-07 07:44:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:39,347 INFO L225 Difference]: With dead ends: 177 [2021-11-07 07:44:39,347 INFO L226 Difference]: Without dead ends: 177 [2021-11-07 07:44:39,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:44:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-07 07:44:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2021-11-07 07:44:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 131 states have (on average 1.549618320610687) internal successors, (203), 166 states have internal predecessors, (203), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:44:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2021-11-07 07:44:39,355 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 17 [2021-11-07 07:44:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:39,356 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2021-11-07 07:44:39,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:44:39,356 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2021-11-07 07:44:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:44:39,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:39,358 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:39,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:44:39,358 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:39,359 INFO L85 PathProgramCache]: Analyzing trace with hash -521946515, now seen corresponding path program 1 times [2021-11-07 07:44:39,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:39,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788191750] [2021-11-07 07:44:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:39,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:39,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:39,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:39,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788191750] [2021-11-07 07:44:39,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788191750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:39,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:39,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 07:44:39,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508794036] [2021-11-07 07:44:39,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:44:39,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:44:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:44:39,676 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:44:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:40,197 INFO L93 Difference]: Finished difference Result 213 states and 249 transitions. [2021-11-07 07:44:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:44:40,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-07 07:44:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:40,200 INFO L225 Difference]: With dead ends: 213 [2021-11-07 07:44:40,200 INFO L226 Difference]: Without dead ends: 213 [2021-11-07 07:44:40,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:44:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-07 07:44:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 175. [2021-11-07 07:44:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 131 states have (on average 1.5419847328244274) internal successors, (202), 166 states have internal predecessors, (202), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:44:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-11-07 07:44:40,208 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 26 [2021-11-07 07:44:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:40,209 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-11-07 07:44:40,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:44:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-11-07 07:44:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:44:40,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:40,211 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:40,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:44:40,211 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:40,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1013125872, now seen corresponding path program 1 times [2021-11-07 07:44:40,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:40,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846520356] [2021-11-07 07:44:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:40,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:40,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:40,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:40,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846520356] [2021-11-07 07:44:40,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846520356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:40,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:40,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 07:44:40,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697892921] [2021-11-07 07:44:40,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:44:40,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:40,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:44:40,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:44:40,620 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:44:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:41,110 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2021-11-07 07:44:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:44:41,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-07 07:44:41,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:41,117 INFO L225 Difference]: With dead ends: 167 [2021-11-07 07:44:41,118 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 07:44:41,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:44:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 07:44:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-11-07 07:44:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 123 states have (on average 1.5528455284552845) internal successors, (191), 158 states have internal predecessors, (191), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:44:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2021-11-07 07:44:41,134 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 28 [2021-11-07 07:44:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:41,136 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2021-11-07 07:44:41,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:44:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2021-11-07 07:44:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 07:44:41,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:41,139 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:41,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:44:41,139 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:41,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1823572622, now seen corresponding path program 1 times [2021-11-07 07:44:41,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:41,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198252090] [2021-11-07 07:44:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:41,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:41,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:41,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-07 07:44:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:41,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:41,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198252090] [2021-11-07 07:44:41,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198252090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:41,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:41,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:44:41,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308081258] [2021-11-07 07:44:41,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:44:41,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:44:41,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:44:41,236 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:44:41,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:41,483 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2021-11-07 07:44:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:44:41,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-11-07 07:44:41,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:41,485 INFO L225 Difference]: With dead ends: 159 [2021-11-07 07:44:41,485 INFO L226 Difference]: Without dead ends: 159 [2021-11-07 07:44:41,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:44:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-07 07:44:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2021-11-07 07:44:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 102 states have (on average 1.5) internal successors, (153), 137 states have internal predecessors, (153), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:44:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2021-11-07 07:44:41,494 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 33 [2021-11-07 07:44:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:41,495 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2021-11-07 07:44:41,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:44:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2021-11-07 07:44:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 07:44:41,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:41,497 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:41,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:44:41,497 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash 157209059, now seen corresponding path program 1 times [2021-11-07 07:44:41,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:41,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370643587] [2021-11-07 07:44:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:41,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:41,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:41,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-07 07:44:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:41,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:41,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370643587] [2021-11-07 07:44:41,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370643587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:41,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227881261] [2021-11-07 07:44:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:41,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:41,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:41,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:42,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:44:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:42,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:44:42,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:42,800 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:44:42,806 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 22 treesize of output 24 [2021-11-07 07:44:42,820 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:44:42,821 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 21 treesize of output 21 [2021-11-07 07:44:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:42,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227881261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:42,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:42,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2021-11-07 07:44:42,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707060412] [2021-11-07 07:44:42,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:44:42,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:42,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:44:42,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:44:42,941 INFO L87 Difference]: Start difference. First operand 146 states and 162 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 16 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:44,237 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2021-11-07 07:44:44,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:44:44,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 16 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-11-07 07:44:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:44,240 INFO L225 Difference]: With dead ends: 155 [2021-11-07 07:44:44,240 INFO L226 Difference]: Without dead ends: 155 [2021-11-07 07:44:44,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:44:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-07 07:44:44,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-11-07 07:44:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 102 states have (on average 1.4215686274509804) internal successors, (145), 136 states have internal predecessors, (145), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:44:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2021-11-07 07:44:44,250 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 35 [2021-11-07 07:44:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:44,253 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2021-11-07 07:44:44,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 16 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2021-11-07 07:44:44,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 07:44:44,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:44,260 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:44:44,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 07:44:44,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:44:44,488 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:44,489 INFO L85 PathProgramCache]: Analyzing trace with hash -983310407, now seen corresponding path program 1 times [2021-11-07 07:44:44,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:44,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242643320] [2021-11-07 07:44:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:44,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:44,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:44,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-07 07:44:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:44,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:44,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242643320] [2021-11-07 07:44:44,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242643320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:44,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688690945] [2021-11-07 07:44:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:44,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:44,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:44,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:44,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:44:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:44,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:44:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:45,018 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 [2021-11-07 07:44:45,325 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 07:44:45,325 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 [2021-11-07 07:44:45,573 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-07 07:44:45,574 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 21 treesize of output 26 [2021-11-07 07:44:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:45,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688690945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:45,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:45,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-07 07:44:45,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230099547] [2021-11-07 07:44:45,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:44:45,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:44:45,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:44:45,644 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:44:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:46,450 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2021-11-07 07:44:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:44:46,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-07 07:44:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:46,453 INFO L225 Difference]: With dead ends: 185 [2021-11-07 07:44:46,453 INFO L226 Difference]: Without dead ends: 185 [2021-11-07 07:44:46,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:44:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-07 07:44:46,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 146. [2021-11-07 07:44:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 137 states have internal predecessors, (148), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:44:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 157 transitions. [2021-11-07 07:44:46,465 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 157 transitions. Word has length 36 [2021-11-07 07:44:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:46,466 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 157 transitions. [2021-11-07 07:44:46,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:44:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 157 transitions. [2021-11-07 07:44:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 07:44:46,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:46,470 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:44:46,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:46,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:46,692 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:46,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:46,693 INFO L85 PathProgramCache]: Analyzing trace with hash -983310406, now seen corresponding path program 1 times [2021-11-07 07:44:46,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:46,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913042822] [2021-11-07 07:44:46,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:46,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:46,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:46,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-07 07:44:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:46,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:46,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913042822] [2021-11-07 07:44:46,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913042822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:46,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689229479] [2021-11-07 07:44:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:46,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:46,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:46,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:46,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:44:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:44:47,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:47,314 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 [2021-11-07 07:44:47,779 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 07:44:47,779 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 30 treesize of output 34 [2021-11-07 07:44:47,794 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:44:47,795 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 28 treesize of output 30 [2021-11-07 07:44:48,122 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-07 07:44:48,122 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 38 treesize of output 43 [2021-11-07 07:44:48,142 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 07:44:48,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-11-07 07:44:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:48,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689229479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:48,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:48,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-11-07 07:44:48,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193216140] [2021-11-07 07:44:48,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:44:48,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:48,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:44:48,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:44:48,302 INFO L87 Difference]: Start difference. First operand 146 states and 157 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:49,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:49,318 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2021-11-07 07:44:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:44:49,319 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-11-07 07:44:49,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:49,321 INFO L225 Difference]: With dead ends: 175 [2021-11-07 07:44:49,321 INFO L226 Difference]: Without dead ends: 175 [2021-11-07 07:44:49,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:44:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-07 07:44:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2021-11-07 07:44:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 104 states have (on average 1.3269230769230769) internal successors, (138), 128 states have internal predecessors, (138), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:44:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2021-11-07 07:44:49,328 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 36 [2021-11-07 07:44:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:49,329 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2021-11-07 07:44:49,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:44:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2021-11-07 07:44:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:44:49,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:49,331 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:49,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:49,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:49,560 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:44:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash 351414952, now seen corresponding path program 1 times [2021-11-07 07:44:49,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:49,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880901762] [2021-11-07 07:44:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:49,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:49,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:44:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:49,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-07 07:44:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:50,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:50,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880901762] [2021-11-07 07:44:50,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880901762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:50,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249685344] [2021-11-07 07:44:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:50,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:50,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:50,268 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:50,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:44:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:50,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:44:50,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:50,629 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 [2021-11-07 07:44:50,703 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:44:50,704 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 12 treesize of output 14 [2021-11-07 07:44:51,193 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 20 treesize of output 16 [2021-11-07 07:44:51,323 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-07 07:44:51,324 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 29 treesize of output 38 [2021-11-07 07:44:51,533 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-07 07:44:51,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 71 [2021-11-07 07:44:54,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 07:44:54,346 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-07 07:44:54,346 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 65 treesize of output 64 [2021-11-07 07:44:54,870 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-07 07:44:54,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 91 [2021-11-07 07:44:55,079 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-07 07:44:55,079 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 83 treesize of output 56 [2021-11-07 07:44:55,668 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-07 07:44:55,669 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 81 treesize of output 65 [2021-11-07 07:44:55,925 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-11-07 07:44:55,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 74 [2021-11-07 07:44:56,206 INFO L354 Elim1Store]: treesize reduction 150, result has 2.0 percent of original size [2021-11-07 07:44:56,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 55 [2021-11-07 07:44:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:56,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249685344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:56,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:56,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2021-11-07 07:44:56,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444011981] [2021-11-07 07:44:56,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 07:44:56,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 07:44:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=736, Unknown=1, NotChecked=0, Total=812 [2021-11-07 07:44:56,319 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:46:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:41,489 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2021-11-07 07:46:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:46:41,490 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2021-11-07 07:46:41,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:41,492 INFO L225 Difference]: With dead ends: 193 [2021-11-07 07:46:41,492 INFO L226 Difference]: Without dead ends: 193 [2021-11-07 07:46:41,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=358, Invalid=1980, Unknown=14, NotChecked=0, Total=2352 [2021-11-07 07:46:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-07 07:46:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 136. [2021-11-07 07:46:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 104 states have (on average 1.3076923076923077) internal successors, (136), 127 states have internal predecessors, (136), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:46:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2021-11-07 07:46:41,502 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 44 [2021-11-07 07:46:41,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:41,503 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2021-11-07 07:46:41,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:46:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2021-11-07 07:46:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:46:41,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:41,505 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:41,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:41,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:41,732 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:46:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash 351414953, now seen corresponding path program 1 times [2021-11-07 07:46:41,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:41,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964766069] [2021-11-07 07:46:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:41,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:42,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:46:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:42,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-07 07:46:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:42,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:42,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964766069] [2021-11-07 07:46:42,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964766069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:42,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8764149] [2021-11-07 07:46:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:42,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:42,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:42,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:46:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 07:46:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:43,209 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 [2021-11-07 07:46:43,287 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:46:43,288 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 12 treesize of output 14 [2021-11-07 07:46:43,787 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 33 treesize of output 29 [2021-11-07 07:46:43,792 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 29 treesize of output 25 [2021-11-07 07:46:43,948 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-07 07:46:43,948 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 51 treesize of output 60 [2021-11-07 07:46:43,980 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-07 07:46:43,981 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 57 treesize of output 66 [2021-11-07 07:46:44,281 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-07 07:46:44,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 122 [2021-11-07 07:46:44,341 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-07 07:46:44,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 131 [2021-11-07 07:46:49,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 07:46:49,624 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-07 07:46:49,624 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 147 treesize of output 146 [2021-11-07 07:46:50,292 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-07 07:46:50,292 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 156 treesize of output 158 [2021-11-07 07:46:50,317 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-07 07:46:50,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 157 [2021-11-07 07:46:50,539 INFO L354 Elim1Store]: treesize reduction 172, result has 15.3 percent of original size [2021-11-07 07:46:50,540 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 169 treesize of output 130 [2021-11-07 07:46:50,576 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-07 07:46:50,577 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 124 [2021-11-07 07:46:51,138 INFO L354 Elim1Store]: treesize reduction 172, result has 15.3 percent of original size [2021-11-07 07:46:51,139 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 165 treesize of output 137 [2021-11-07 07:46:51,180 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-07 07:46:51,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 133 [2021-11-07 07:46:51,434 INFO L354 Elim1Store]: treesize reduction 206, result has 16.3 percent of original size [2021-11-07 07:46:51,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 146 [2021-11-07 07:46:51,490 INFO L354 Elim1Store]: treesize reduction 174, result has 17.1 percent of original size [2021-11-07 07:46:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 151 [2021-11-07 07:46:51,799 INFO L354 Elim1Store]: treesize reduction 198, result has 1.5 percent of original size [2021-11-07 07:46:51,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 187 treesize of output 115 [2021-11-07 07:46:51,826 INFO L354 Elim1Store]: treesize reduction 134, result has 2.2 percent of original size [2021-11-07 07:46:51,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 97 treesize of output 62 [2021-11-07 07:46:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:51,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8764149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:51,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:51,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2021-11-07 07:46:51,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899344517] [2021-11-07 07:46:51,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 07:46:51,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:51,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 07:46:51,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=740, Unknown=2, NotChecked=0, Total=812 [2021-11-07 07:46:51,926 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:48:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:45,278 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2021-11-07 07:48:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:48:45,279 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2021-11-07 07:48:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:45,281 INFO L225 Difference]: With dead ends: 191 [2021-11-07 07:48:45,282 INFO L226 Difference]: Without dead ends: 191 [2021-11-07 07:48:45,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 50.0s TimeCoverageRelationStatistics Valid=347, Invalid=1987, Unknown=18, NotChecked=0, Total=2352 [2021-11-07 07:48:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-07 07:48:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 136. [2021-11-07 07:48:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 127 states have internal predecessors, (135), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:48:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2021-11-07 07:48:45,291 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 44 [2021-11-07 07:48:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:45,292 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2021-11-07 07:48:45,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 24 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:48:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2021-11-07 07:48:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 07:48:45,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:45,293 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:45,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 07:48:45,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:48:45,508 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:48:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:45,509 INFO L85 PathProgramCache]: Analyzing trace with hash -218513743, now seen corresponding path program 1 times [2021-11-07 07:48:45,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:45,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82360126] [2021-11-07 07:48:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:45,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:48:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:45,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-07 07:48:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:49,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:49,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82360126] [2021-11-07 07:48:49,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82360126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:49,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528294043] [2021-11-07 07:48:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:49,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:49,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:49,132 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:49,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:48:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:49,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 07:48:49,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:49,613 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 [2021-11-07 07:48:49,665 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 07:48:49,665 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 [2021-11-07 07:48:49,757 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 [2021-11-07 07:48:49,778 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 [2021-11-07 07:48:49,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:48:49,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 07:48:49,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:48:49,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 07:49:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:49:26,463 INFO L354 Elim1Store]: treesize reduction 810, result has 5.7 percent of original size [2021-11-07 07:49:26,463 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 7 case distinctions, treesize of input 210 treesize of output 181 [2021-11-07 07:49:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:49:26,723 INFO L354 Elim1Store]: treesize reduction 1002, result has 5.4 percent of original size [2021-11-07 07:49:26,723 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 7 case distinctions, treesize of input 221 treesize of output 164 [2021-11-07 07:49:26,773 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-07 07:49:26,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 160 treesize of output 175 [2021-11-07 07:49:27,956 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-11-07 07:49:27,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 143 [2021-11-07 07:49:28,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:49:28,428 INFO L354 Elim1Store]: treesize reduction 414, result has 11.7 percent of original size [2021-11-07 07:49:28,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 193 treesize of output 186 [2021-11-07 07:49:28,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:49:28,579 INFO L354 Elim1Store]: treesize reduction 454, result has 11.5 percent of original size [2021-11-07 07:49:28,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 178 treesize of output 156 [2021-11-07 07:49:28,909 INFO L354 Elim1Store]: treesize reduction 230, result has 0.4 percent of original size [2021-11-07 07:49:28,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 157 treesize of output 94 [2021-11-07 07:49:28,928 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-11-07 07:49:28,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 44 [2021-11-07 07:49:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:28,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528294043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:28,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:28,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-11-07 07:49:28,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639021129] [2021-11-07 07:49:28,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:49:28,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:49:28,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=874, Unknown=15, NotChecked=0, Total=992 [2021-11-07 07:49:28,977 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 27 states have internal predecessors, (67), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:51:40,807 WARN L207 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-11-07 07:56:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:22,525 INFO L93 Difference]: Finished difference Result 228 states and 246 transitions. [2021-11-07 07:56:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:56:22,527 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 27 states have internal predecessors, (67), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-11-07 07:56:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:22,529 INFO L225 Difference]: With dead ends: 228 [2021-11-07 07:56:22,529 INFO L226 Difference]: Without dead ends: 228 [2021-11-07 07:56:22,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 231.8s TimeCoverageRelationStatistics Valid=269, Invalid=1987, Unknown=96, NotChecked=0, Total=2352 [2021-11-07 07:56:22,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-07 07:56:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 150. [2021-11-07 07:56:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 115 states have (on average 1.2782608695652173) internal successors, (147), 139 states have internal predecessors, (147), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-07 07:56:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2021-11-07 07:56:22,540 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 45 [2021-11-07 07:56:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:22,541 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2021-11-07 07:56:22,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 27 states have internal predecessors, (67), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:56:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2021-11-07 07:56:22,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 07:56:22,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:22,543 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:22,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:22,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:56:22,765 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-11-07 07:56:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:22,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1472008108, now seen corresponding path program 1 times [2021-11-07 07:56:22,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:22,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622949570] [2021-11-07 07:56:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:22,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:23,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:56:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-07 07:56:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:26,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:26,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622949570] [2021-11-07 07:56:26,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622949570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:26,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294959136] [2021-11-07 07:56:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:26,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:26,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:26,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:26,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8068a5-2dfd-4318-9ab5-6b9e1d4bf2d5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:56:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:26,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-07 07:56:26,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:26,894 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 [2021-11-07 07:56:26,976 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 07:56:26,976 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 [2021-11-07 07:56:27,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 07:56:27,084 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 13 treesize of output 9 [2021-11-07 07:57:03,099 INFO L354 Elim1Store]: treesize reduction 594, result has 6.6 percent of original size [2021-11-07 07:57:03,100 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 5 case distinctions, treesize of input 196 treesize of output 164 [2021-11-07 07:57:03,244 INFO L354 Elim1Store]: treesize reduction 734, result has 6.4 percent of original size [2021-11-07 07:57:03,244 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 5 case distinctions, treesize of input 207 treesize of output 147 [2021-11-07 07:57:03,278 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-07 07:57:03,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 146 treesize of output 161 [2021-11-07 07:57:04,072 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-11-07 07:57:04,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 143 [2021-11-07 07:57:04,438 INFO L354 Elim1Store]: treesize reduction 364, result has 12.5 percent of original size [2021-11-07 07:57:04,439 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 185 treesize of output 160 [2021-11-07 07:57:04,510 INFO L354 Elim1Store]: treesize reduction 328, result has 12.8 percent of original size [2021-11-07 07:57:04,511 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 170 treesize of output 160 [2021-11-07 07:57:25,647 INFO L354 Elim1Store]: treesize reduction 276, result has 1.1 percent of original size [2021-11-07 07:57:25,647 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 7 new quantified variables, introduced 15 case distinctions, treesize of input 168 treesize of output 104 [2021-11-07 07:57:25,729 INFO L354 Elim1Store]: treesize reduction 196, result has 1.5 percent of original size [2021-11-07 07:57:25,730 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 86 treesize of output 53 [2021-11-07 07:57:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:26,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294959136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:26,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:26,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-11-07 07:57:26,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341959754] [2021-11-07 07:57:26,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 07:57:26,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:26,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 07:57:26,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1203, Unknown=20, NotChecked=0, Total=1332 [2021-11-07 07:57:26,280 INFO L87 Difference]: Start difference. First operand 150 states and 162 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 32 states have internal predecessors, (75), 5 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)