./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa --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 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:43:22,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:43:22,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:43:22,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:43:22,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:43:22,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:43:22,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:43:22,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:43:22,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:43:22,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:43:22,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:43:22,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:43:22,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:43:22,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:43:22,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:43:22,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:43:22,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:43:22,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:43:22,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:43:22,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:43:22,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:43:22,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:43:22,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:43:22,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:43:22,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:43:22,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:43:22,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:43:22,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:43:22,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:43:22,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:43:22,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:43:22,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:43:22,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:43:22,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:43:22,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:43:22,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:43:22,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:43:22,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:43:22,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:43:22,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:43:22,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:43:22,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 17:43:22,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:43:22,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:43:22,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:43:22,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:43:22,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:43:22,957 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:43:22,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:43:22,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:43:22,958 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:43:22,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:43:22,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:43:22,958 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:43:22,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:43:22,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:43:22,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:43:22,959 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 17:43:22,959 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 17:43:22,959 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 17:43:22,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:43:22,959 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:43:22,959 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:43:22,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:43:22,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:43:22,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:43:22,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:43:22,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:43:22,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:43:22,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:43:22,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:43:22,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:43:22,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:43:22,960 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_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2021-12-06 17:43:23,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:43:23,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:43:23,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:43:23,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:43:23,154 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:43:23,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2021-12-06 17:43:23,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/data/7046ca337/a468299a49794f51b897c2badd179a99/FLAGa0293686e [2021-12-06 17:43:23,619 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:43:23,619 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2021-12-06 17:43:23,628 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/data/7046ca337/a468299a49794f51b897c2badd179a99/FLAGa0293686e [2021-12-06 17:43:23,638 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/data/7046ca337/a468299a49794f51b897c2badd179a99 [2021-12-06 17:43:23,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:43:23,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:43:23,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:43:23,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:43:23,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:43:23,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33fb1a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23, skipping insertion in model container [2021-12-06 17:43:23,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:43:23,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:43:23,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:43:23,865 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:43:23,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:43:23,915 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:43:23,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23 WrapperNode [2021-12-06 17:43:23,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:43:23,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:43:23,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:43:23,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:43:23,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,954 INFO L137 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2021-12-06 17:43:23,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:43:23,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:43:23,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:43:23,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:43:23,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:43:23,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:43:23,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:43:23,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:43:23,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (1/1) ... [2021-12-06 17:43:23,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:43:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:24,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:43:24,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:43:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:43:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:43:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:43:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:43:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:43:24,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:43:24,099 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:43:24,100 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:43:24,241 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:43:24,245 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:43:24,245 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 17:43:24,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:43:24 BoogieIcfgContainer [2021-12-06 17:43:24,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:43:24,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:43:24,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:43:24,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:43:24,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:43:23" (1/3) ... [2021-12-06 17:43:24,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162c9e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:43:24, skipping insertion in model container [2021-12-06 17:43:24,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:43:23" (2/3) ... [2021-12-06 17:43:24,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162c9e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:43:24, skipping insertion in model container [2021-12-06 17:43:24,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:43:24" (3/3) ... [2021-12-06 17:43:24,252 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2021-12-06 17:43:24,256 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:43:24,256 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-12-06 17:43:24,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:43:24,294 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 [2021-12-06 17:43:24,294 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-12-06 17:43:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.96875) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 17:43:24,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:24,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:24,311 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:24,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:24,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031113, now seen corresponding path program 1 times [2021-12-06 17:43:24,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:24,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520660459] [2021-12-06 17:43:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:24,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:24,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:24,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520660459] [2021-12-06 17:43:24,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520660459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:24,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:24,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:43:24,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575298682] [2021-12-06 17:43:24,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:24,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:43:24,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:24,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:43:24,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:43:24,470 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.96875) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:24,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:24,521 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-12-06 17:43:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:43:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 17:43:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:24,530 INFO L225 Difference]: With dead ends: 51 [2021-12-06 17:43:24,530 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 17:43:24,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:43:24,536 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:24,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 86 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 17:43:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-06 17:43:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-06 17:43:24,568 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 7 [2021-12-06 17:43:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:24,569 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-06 17:43:24,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-06 17:43:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:43:24,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:24,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:24,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:43:24,570 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-12-06 17:43:24,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:24,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592952581] [2021-12-06 17:43:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:24,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:24,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:24,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592952581] [2021-12-06 17:43:24,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592952581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:24,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:24,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:43:24,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811744334] [2021-12-06 17:43:24,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:24,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:43:24,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:24,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:43:24,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:43:24,639 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:24,698 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-12-06 17:43:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:43:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:43:24,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:24,699 INFO L225 Difference]: With dead ends: 51 [2021-12-06 17:43:24,699 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 17:43:24,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:43:24,702 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:24,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 185 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 17:43:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-06 17:43:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-06 17:43:24,709 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2021-12-06 17:43:24,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:24,710 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-06 17:43:24,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-06 17:43:24,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:43:24,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:24,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:24,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:43:24,711 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:24,712 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-12-06 17:43:24,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:24,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243621209] [2021-12-06 17:43:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:24,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:24,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:24,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243621209] [2021-12-06 17:43:24,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243621209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:24,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:24,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:43:24,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827598133] [2021-12-06 17:43:24,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:24,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:43:24,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:24,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:43:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:43:24,793 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:24,856 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2021-12-06 17:43:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:43:24,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:43:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:24,857 INFO L225 Difference]: With dead ends: 88 [2021-12-06 17:43:24,858 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 17:43:24,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:43:24,859 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 130 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:24,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 64 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 17:43:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 46. [2021-12-06 17:43:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-06 17:43:24,866 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 8 [2021-12-06 17:43:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:24,867 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-06 17:43:24,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-06 17:43:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:43:24,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:24,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:24,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:43:24,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:24,869 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2021-12-06 17:43:24,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:24,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583292975] [2021-12-06 17:43:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:24,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:24,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:24,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583292975] [2021-12-06 17:43:24,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583292975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:24,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:24,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:43:24,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850022028] [2021-12-06 17:43:24,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:24,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:43:24,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:43:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:43:24,942 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:25,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:25,001 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2021-12-06 17:43:25,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:43:25,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:43:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:25,002 INFO L225 Difference]: With dead ends: 85 [2021-12-06 17:43:25,002 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 17:43:25,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:43:25,003 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 132 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:25,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:25,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 17:43:25,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 48. [2021-12-06 17:43:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-06 17:43:25,008 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 8 [2021-12-06 17:43:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:25,009 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-06 17:43:25,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-06 17:43:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:43:25,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:25,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:25,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:43:25,010 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:25,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:25,010 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2021-12-06 17:43:25,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:25,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618700889] [2021-12-06 17:43:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:25,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:25,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:25,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618700889] [2021-12-06 17:43:25,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618700889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:25,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:25,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:43:25,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650901041] [2021-12-06 17:43:25,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:25,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:43:25,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:25,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:43:25,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:43:25,046 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:25,075 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-12-06 17:43:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:43:25,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 17:43:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:25,076 INFO L225 Difference]: With dead ends: 50 [2021-12-06 17:43:25,076 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 17:43:25,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:43:25,077 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 103 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:25,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 84 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 17:43:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-06 17:43:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-06 17:43:25,081 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 10 [2021-12-06 17:43:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:25,081 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-06 17:43:25,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-06 17:43:25,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:43:25,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:25,082 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:25,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:43:25,082 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:25,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2021-12-06 17:43:25,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:25,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277256748] [2021-12-06 17:43:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:25,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:25,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:25,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277256748] [2021-12-06 17:43:25,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277256748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:25,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750137537] [2021-12-06 17:43:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:25,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:25,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:25,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:43:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:25,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:43:25,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:25,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:25,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:43:25,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:25,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:25,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750137537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:25,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:25,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-06 17:43:25,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968278877] [2021-12-06 17:43:25,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:25,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:43:25,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:43:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:43:25,478 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:25,594 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2021-12-06 17:43:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:43:25,594 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 17:43:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:25,595 INFO L225 Difference]: With dead ends: 85 [2021-12-06 17:43:25,595 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 17:43:25,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:43:25,596 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 211 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:25,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 203 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:43:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 17:43:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 46. [2021-12-06 17:43:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.65625) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-06 17:43:25,601 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2021-12-06 17:43:25,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:25,601 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-06 17:43:25,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-06 17:43:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:43:25,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:25,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:25,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:43:25,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:25,802 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:25,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:25,803 INFO L85 PathProgramCache]: Analyzing trace with hash 840060780, now seen corresponding path program 1 times [2021-12-06 17:43:25,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:25,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040109564] [2021-12-06 17:43:25,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:25,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:25,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:25,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040109564] [2021-12-06 17:43:25,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040109564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:25,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184982872] [2021-12-06 17:43:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:25,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:25,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:25,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:25,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:43:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:25,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:43:25,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:26,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:43:26,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184982872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:26,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:43:26,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-12-06 17:43:26,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061819486] [2021-12-06 17:43:26,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:26,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:43:26,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:26,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:43:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:43:26,032 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:26,091 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-06 17:43:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:43:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:43:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:26,092 INFO L225 Difference]: With dead ends: 45 [2021-12-06 17:43:26,092 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 17:43:26,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:43:26,093 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 213 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:26,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 57 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 17:43:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-06 17:43:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.625) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-06 17:43:26,097 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2021-12-06 17:43:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:26,097 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-06 17:43:26,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-06 17:43:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:43:26,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:26,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:26,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:43:26,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:26,300 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash 840060832, now seen corresponding path program 1 times [2021-12-06 17:43:26,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:26,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815029821] [2021-12-06 17:43:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:26,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:26,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815029821] [2021-12-06 17:43:26,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815029821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:26,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:26,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:43:26,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845030608] [2021-12-06 17:43:26,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:26,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:43:26,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:43:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:43:26,361 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:26,374 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-12-06 17:43:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:43:26,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:43:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:26,375 INFO L225 Difference]: With dead ends: 81 [2021-12-06 17:43:26,375 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 17:43:26,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:43:26,376 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 33 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:26,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 129 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 17:43:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2021-12-06 17:43:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-06 17:43:26,379 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2021-12-06 17:43:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:26,380 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-06 17:43:26,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-06 17:43:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:43:26,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:26,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:26,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:43:26,380 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:26,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125410, now seen corresponding path program 1 times [2021-12-06 17:43:26,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:26,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959711891] [2021-12-06 17:43:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:26,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:26,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:26,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959711891] [2021-12-06 17:43:26,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959711891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:26,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:26,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:43:26,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911810922] [2021-12-06 17:43:26,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:26,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:43:26,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:43:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:43:26,401 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:26,413 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-12-06 17:43:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:43:26,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:43:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:26,413 INFO L225 Difference]: With dead ends: 52 [2021-12-06 17:43:26,413 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 17:43:26,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:43:26,414 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:26,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 17:43:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-06 17:43:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-12-06 17:43:26,417 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 14 [2021-12-06 17:43:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:26,417 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-12-06 17:43:26,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-12-06 17:43:26,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:43:26,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:26,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:26,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:43:26,418 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:26,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:26,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2021-12-06 17:43:26,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:26,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269691402] [2021-12-06 17:43:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:26,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:26,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:26,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269691402] [2021-12-06 17:43:26,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269691402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:26,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:26,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:43:26,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966957493] [2021-12-06 17:43:26,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:26,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:43:26,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:43:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:43:26,454 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:26,494 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-12-06 17:43:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:43:26,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:43:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:26,495 INFO L225 Difference]: With dead ends: 82 [2021-12-06 17:43:26,495 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 17:43:26,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:43:26,496 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 177 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:26,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 60 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 17:43:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2021-12-06 17:43:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-12-06 17:43:26,501 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 14 [2021-12-06 17:43:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:26,501 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-12-06 17:43:26,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-12-06 17:43:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 17:43:26,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:26,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:26,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:43:26,502 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash 272080408, now seen corresponding path program 1 times [2021-12-06 17:43:26,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:26,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578019744] [2021-12-06 17:43:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:26,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:26,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:26,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578019744] [2021-12-06 17:43:26,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578019744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:26,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:26,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:43:26,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930351596] [2021-12-06 17:43:26,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:26,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:43:26,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:43:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:43:26,541 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:26,558 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-12-06 17:43:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:43:26,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 17:43:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:26,559 INFO L225 Difference]: With dead ends: 53 [2021-12-06 17:43:26,559 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 17:43:26,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:43:26,560 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 74 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:26,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 35 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 17:43:26,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 17:43:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-12-06 17:43:26,563 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 15 [2021-12-06 17:43:26,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:26,563 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-12-06 17:43:26,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,564 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-12-06 17:43:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:43:26,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:26,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:26,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:43:26,564 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash 944154227, now seen corresponding path program 1 times [2021-12-06 17:43:26,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:26,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897740883] [2021-12-06 17:43:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:26,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:26,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:26,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897740883] [2021-12-06 17:43:26,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897740883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:26,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:26,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:43:26,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860939947] [2021-12-06 17:43:26,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:26,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:43:26,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:43:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:43:26,596 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:26,631 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-12-06 17:43:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:43:26,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 17:43:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:26,632 INFO L225 Difference]: With dead ends: 52 [2021-12-06 17:43:26,632 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 17:43:26,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:43:26,633 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 59 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:26,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 63 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 17:43:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-12-06 17:43:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-06 17:43:26,635 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 18 [2021-12-06 17:43:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:26,636 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-06 17:43:26,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-06 17:43:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:43:26,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:26,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:26,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:43:26,637 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash 944154228, now seen corresponding path program 1 times [2021-12-06 17:43:26,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:26,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053154320] [2021-12-06 17:43:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:26,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:26,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:26,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053154320] [2021-12-06 17:43:26,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053154320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:26,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406777058] [2021-12-06 17:43:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:26,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:26,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:26,695 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:26,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:43:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:26,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 17:43:26,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:26,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:26,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:43:26,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:26,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:43:26,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406777058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:26,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:43:26,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-12-06 17:43:26,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896108425] [2021-12-06 17:43:26,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:26,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:43:26,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:43:26,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:43:26,835 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:26,896 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-12-06 17:43:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:43:26,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 17:43:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:26,897 INFO L225 Difference]: With dead ends: 63 [2021-12-06 17:43:26,897 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 17:43:26,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:43:26,898 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:26,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 74 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 17:43:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-12-06 17:43:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.42) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-12-06 17:43:26,902 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 18 [2021-12-06 17:43:26,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:26,902 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-12-06 17:43:26,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-12-06 17:43:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:43:26,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:26,903 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:26,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:43:27,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:27,110 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2021-12-06 17:43:27,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:27,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318787042] [2021-12-06 17:43:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:27,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:27,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:27,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318787042] [2021-12-06 17:43:27,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318787042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:27,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292888838] [2021-12-06 17:43:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:27,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:27,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:27,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:27,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:43:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:27,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:43:27,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:27,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:27,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292888838] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:27,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:27,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-06 17:43:27,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811679698] [2021-12-06 17:43:27,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:27,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:43:27,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:27,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:43:27,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:43:27,414 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:27,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:27,526 INFO L93 Difference]: Finished difference Result 133 states and 163 transitions. [2021-12-06 17:43:27,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:43:27,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 17:43:27,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:27,528 INFO L225 Difference]: With dead ends: 133 [2021-12-06 17:43:27,528 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 17:43:27,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:43:27,529 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 298 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:27,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 196 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:27,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 17:43:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 61. [2021-12-06 17:43:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 60 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2021-12-06 17:43:27,533 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 18 [2021-12-06 17:43:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:27,534 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2021-12-06 17:43:27,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2021-12-06 17:43:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:43:27,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:27,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:27,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:43:27,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:27,737 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:27,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:27,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1095465713, now seen corresponding path program 1 times [2021-12-06 17:43:27,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:27,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123931470] [2021-12-06 17:43:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:27,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:27,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123931470] [2021-12-06 17:43:27,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123931470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:27,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:27,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:43:27,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871514316] [2021-12-06 17:43:27,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:27,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:43:27,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:27,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:43:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:43:27,894 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:27,913 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2021-12-06 17:43:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:43:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 17:43:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:27,914 INFO L225 Difference]: With dead ends: 130 [2021-12-06 17:43:27,914 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 17:43:27,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:43:27,915 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:27,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 134 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 17:43:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2021-12-06 17:43:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 89 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2021-12-06 17:43:27,920 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 20 [2021-12-06 17:43:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:27,920 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2021-12-06 17:43:27,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2021-12-06 17:43:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:43:27,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:27,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:27,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:43:27,921 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1094114349, now seen corresponding path program 1 times [2021-12-06 17:43:27,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:27,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150213678] [2021-12-06 17:43:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:27,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:27,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:27,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150213678] [2021-12-06 17:43:27,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150213678] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:27,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387460596] [2021-12-06 17:43:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:27,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:27,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:27,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:27,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:43:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 17:43:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:28,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:28,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:43:28,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:28,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:28,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:43:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:28,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387460596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:28,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:28,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2021-12-06 17:43:28,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168860970] [2021-12-06 17:43:28,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:28,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:43:28,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:28,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:43:28,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:43:28,247 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:28,389 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2021-12-06 17:43:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:43:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 17:43:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:28,390 INFO L225 Difference]: With dead ends: 121 [2021-12-06 17:43:28,390 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 17:43:28,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:43:28,391 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 307 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:28,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 188 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:43:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 17:43:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2021-12-06 17:43:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.348314606741573) internal successors, (120), 95 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2021-12-06 17:43:28,396 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 20 [2021-12-06 17:43:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:28,396 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2021-12-06 17:43:28,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2021-12-06 17:43:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:43:28,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:28,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:28,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:43:28,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 17:43:28,598 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:28,598 INFO L85 PathProgramCache]: Analyzing trace with hash 74397359, now seen corresponding path program 1 times [2021-12-06 17:43:28,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:28,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441743591] [2021-12-06 17:43:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:28,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:28,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:28,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441743591] [2021-12-06 17:43:28,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441743591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:28,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:28,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:43:28,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501387937] [2021-12-06 17:43:28,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:28,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:43:28,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:28,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:43:28,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:43:28,643 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:28,658 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2021-12-06 17:43:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:43:28,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 17:43:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:28,659 INFO L225 Difference]: With dead ends: 108 [2021-12-06 17:43:28,659 INFO L226 Difference]: Without dead ends: 108 [2021-12-06 17:43:28,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:43:28,660 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 66 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:28,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 75 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-06 17:43:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2021-12-06 17:43:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.4) internal successors, (84), 66 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-12-06 17:43:28,662 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 20 [2021-12-06 17:43:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:28,662 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-12-06 17:43:28,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,662 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-12-06 17:43:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 17:43:28,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:28,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:28,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 17:43:28,663 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash -442195040, now seen corresponding path program 1 times [2021-12-06 17:43:28,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:28,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356103508] [2021-12-06 17:43:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:28,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:28,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:28,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356103508] [2021-12-06 17:43:28,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356103508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:28,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:28,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:43:28,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053019459] [2021-12-06 17:43:28,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:28,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:43:28,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:43:28,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:43:28,697 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:28,736 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2021-12-06 17:43:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:43:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 17:43:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:28,737 INFO L225 Difference]: With dead ends: 66 [2021-12-06 17:43:28,738 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 17:43:28,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:43:28,738 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 66 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:28,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 84 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 17:43:28,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-06 17:43:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.35) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2021-12-06 17:43:28,741 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2021-12-06 17:43:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:28,742 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2021-12-06 17:43:28,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2021-12-06 17:43:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 17:43:28,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:28,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:28,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 17:43:28,743 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash -442195039, now seen corresponding path program 1 times [2021-12-06 17:43:28,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:28,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500938838] [2021-12-06 17:43:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:28,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:28,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:28,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500938838] [2021-12-06 17:43:28,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500938838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:28,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:28,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:43:28,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661265761] [2021-12-06 17:43:28,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:28,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:43:28,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:28,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:43:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:43:28,813 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:28,882 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2021-12-06 17:43:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:43:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 17:43:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:28,884 INFO L225 Difference]: With dead ends: 70 [2021-12-06 17:43:28,884 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 17:43:28,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:43:28,885 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 138 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:28,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 90 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 17:43:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-12-06 17:43:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-12-06 17:43:28,889 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 21 [2021-12-06 17:43:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:28,889 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-12-06 17:43:28,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-12-06 17:43:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 17:43:28,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:28,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:28,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:43:28,891 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:28,891 INFO L85 PathProgramCache]: Analyzing trace with hash -823097434, now seen corresponding path program 2 times [2021-12-06 17:43:28,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:28,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283461665] [2021-12-06 17:43:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:28,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:29,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283461665] [2021-12-06 17:43:29,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283461665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777409792] [2021-12-06 17:43:29,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:43:29,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:29,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:29,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:43:29,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:43:29,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:29,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 17:43:29,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:29,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:29,230 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 14 treesize of output 10 [2021-12-06 17:43:29,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:43:29,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:43:29,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:29,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-06 17:43:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:29,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:29,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:29,414 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-06 17:43:29,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:29,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-12-06 17:43:29,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 17:43:29,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:29,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777409792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:29,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:29,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2021-12-06 17:43:29,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318304599] [2021-12-06 17:43:29,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:29,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 17:43:29,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:29,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 17:43:29,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=664, Unknown=1, NotChecked=0, Total=756 [2021-12-06 17:43:29,570 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:29,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:29,931 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2021-12-06 17:43:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 17:43:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 17:43:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:29,932 INFO L225 Difference]: With dead ends: 110 [2021-12-06 17:43:29,932 INFO L226 Difference]: Without dead ends: 110 [2021-12-06 17:43:29,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=1427, Unknown=1, NotChecked=0, Total=1722 [2021-12-06 17:43:29,933 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 223 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:29,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 366 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 204 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2021-12-06 17:43:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-06 17:43:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2021-12-06 17:43:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-12-06 17:43:29,936 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 22 [2021-12-06 17:43:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:29,936 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-12-06 17:43:29,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-12-06 17:43:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 17:43:29,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:29,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:29,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:43:30,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:30,138 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1863163671, now seen corresponding path program 2 times [2021-12-06 17:43:30,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83750313] [2021-12-06 17:43:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:30,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:30,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:30,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83750313] [2021-12-06 17:43:30,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83750313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:30,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205880270] [2021-12-06 17:43:30,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:43:30,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:30,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:30,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:30,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:43:30,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:43:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:30,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:43:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:30,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:30,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205880270] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:30,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:30,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-06 17:43:30,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604338048] [2021-12-06 17:43:30,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:30,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:43:30,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:30,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:43:30,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:43:30,408 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:30,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:30,608 INFO L93 Difference]: Finished difference Result 234 states and 274 transitions. [2021-12-06 17:43:30,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:43:30,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 17:43:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:30,610 INFO L225 Difference]: With dead ends: 234 [2021-12-06 17:43:30,610 INFO L226 Difference]: Without dead ends: 234 [2021-12-06 17:43:30,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 17:43:30,612 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 669 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:30,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 342 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:43:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-06 17:43:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 89. [2021-12-06 17:43:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 88 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2021-12-06 17:43:30,616 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 22 [2021-12-06 17:43:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:30,617 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2021-12-06 17:43:30,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2021-12-06 17:43:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 17:43:30,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:30,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:30,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:43:30,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 17:43:30,818 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1330977111, now seen corresponding path program 3 times [2021-12-06 17:43:30,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:30,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624179727] [2021-12-06 17:43:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:30,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:30,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:30,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624179727] [2021-12-06 17:43:30,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624179727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:30,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865880418] [2021-12-06 17:43:30,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:43:30,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:30,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:30,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:30,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:43:30,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:43:30,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:30,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 17:43:30,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:30,993 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:43:30,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:43:31,175 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 17 treesize of output 13 [2021-12-06 17:43:31,276 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-12-06 17:43:31,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:43:31,582 INFO L354 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2021-12-06 17:43:31,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 17:43:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:43:31,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:31,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-12-06 17:43:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:43:31,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865880418] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:31,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:31,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 26 [2021-12-06 17:43:31,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566944213] [2021-12-06 17:43:31,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:31,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 17:43:31,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:31,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 17:43:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-12-06 17:43:31,988 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:32,451 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2021-12-06 17:43:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 17:43:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 17:43:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:32,452 INFO L225 Difference]: With dead ends: 142 [2021-12-06 17:43:32,452 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 17:43:32,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:43:32,453 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 141 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:32,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 706 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 587 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2021-12-06 17:43:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 17:43:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2021-12-06 17:43:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.2903225806451613) internal successors, (120), 98 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:32,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2021-12-06 17:43:32,457 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 26 [2021-12-06 17:43:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:32,457 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2021-12-06 17:43:32,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:32,458 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2021-12-06 17:43:32,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 17:43:32,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:32,458 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:32,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:43:32,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 17:43:32,660 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:32,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:32,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1807429356, now seen corresponding path program 3 times [2021-12-06 17:43:32,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:32,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314572346] [2021-12-06 17:43:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:32,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:43:32,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:32,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314572346] [2021-12-06 17:43:32,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314572346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:32,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117649397] [2021-12-06 17:43:32,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:43:32,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:32,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:32,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:32,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:43:32,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 17:43:32,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:32,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 17:43:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:32,793 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:43:32,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:43:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:43:32,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:43:33,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117649397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:33,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:33,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-06 17:43:33,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349919396] [2021-12-06 17:43:33,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:33,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:43:33,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:33,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:43:33,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:43:33,025 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:33,117 INFO L93 Difference]: Finished difference Result 194 states and 236 transitions. [2021-12-06 17:43:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:43:33,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 17:43:33,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:33,118 INFO L225 Difference]: With dead ends: 194 [2021-12-06 17:43:33,118 INFO L226 Difference]: Without dead ends: 194 [2021-12-06 17:43:33,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:43:33,119 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 115 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:33,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 216 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:43:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-06 17:43:33,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 96. [2021-12-06 17:43:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 95 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-12-06 17:43:33,122 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 26 [2021-12-06 17:43:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:33,122 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-12-06 17:43:33,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-12-06 17:43:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:43:33,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:33,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:33,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 17:43:33,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 17:43:33,324 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:33,324 INFO L85 PathProgramCache]: Analyzing trace with hash 803583084, now seen corresponding path program 1 times [2021-12-06 17:43:33,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:33,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554467088] [2021-12-06 17:43:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:33,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:33,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:33,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554467088] [2021-12-06 17:43:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554467088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:33,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:33,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:43:33,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97228415] [2021-12-06 17:43:33,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:33,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:43:33,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:33,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:43:33,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:43:33,382 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:33,397 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2021-12-06 17:43:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:43:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 17:43:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:33,398 INFO L225 Difference]: With dead ends: 95 [2021-12-06 17:43:33,398 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 17:43:33,398 INFO L932 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 [2021-12-06 17:43:33,399 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:33,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 17:43:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-06 17:43:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-12-06 17:43:33,401 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 27 [2021-12-06 17:43:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:33,401 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-12-06 17:43:33,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-12-06 17:43:33,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:43:33,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:33,402 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:33,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 17:43:33,402 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:33,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:33,402 INFO L85 PathProgramCache]: Analyzing trace with hash 805151438, now seen corresponding path program 1 times [2021-12-06 17:43:33,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:33,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457638988] [2021-12-06 17:43:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:33,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:33,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:33,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457638988] [2021-12-06 17:43:33,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457638988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:33,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:43:33,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:43:33,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649648867] [2021-12-06 17:43:33,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:33,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:43:33,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:33,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:43:33,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:43:33,449 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:33,477 INFO L93 Difference]: Finished difference Result 167 states and 189 transitions. [2021-12-06 17:43:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:43:33,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 17:43:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:33,478 INFO L225 Difference]: With dead ends: 167 [2021-12-06 17:43:33,478 INFO L226 Difference]: Without dead ends: 147 [2021-12-06 17:43:33,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:43:33,479 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:33,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-06 17:43:33,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-12-06 17:43:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 143 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2021-12-06 17:43:33,482 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 27 [2021-12-06 17:43:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:33,482 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2021-12-06 17:43:33,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2021-12-06 17:43:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:43:33,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:33,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:33,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 17:43:33,483 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1000286896, now seen corresponding path program 1 times [2021-12-06 17:43:33,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:33,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812321015] [2021-12-06 17:43:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:33,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:33,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:33,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812321015] [2021-12-06 17:43:33,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812321015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:33,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038807678] [2021-12-06 17:43:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:33,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:33,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:33,556 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:33,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:43:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:33,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:43:33,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:33,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:43:33,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:43:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:33,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:43:33,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038807678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:43:33,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:43:33,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-06 17:43:33,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600697947] [2021-12-06 17:43:33,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:43:33,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:43:33,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:33,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:43:33,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:43:33,713 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:33,815 INFO L93 Difference]: Finished difference Result 193 states and 216 transitions. [2021-12-06 17:43:33,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:43:33,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 17:43:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:33,816 INFO L225 Difference]: With dead ends: 193 [2021-12-06 17:43:33,816 INFO L226 Difference]: Without dead ends: 169 [2021-12-06 17:43:33,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:43:33,817 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:33,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 213 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:43:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-06 17:43:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 145. [2021-12-06 17:43:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.177304964539007) internal successors, (166), 144 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-12-06 17:43:33,821 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 27 [2021-12-06 17:43:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:33,822 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-12-06 17:43:33,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-12-06 17:43:33,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:43:33,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:33,823 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:33,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 17:43:34,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:34,025 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:34,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:34,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1134300402, now seen corresponding path program 1 times [2021-12-06 17:43:34,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:34,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103048224] [2021-12-06 17:43:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:34,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:34,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:34,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103048224] [2021-12-06 17:43:34,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103048224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:34,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517201878] [2021-12-06 17:43:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:34,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:34,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:34,220 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:34,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 17:43:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:34,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 17:43:34,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:34,289 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 14 treesize of output 10 [2021-12-06 17:43:34,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:34,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 17:43:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:34,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:34,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 17:43:34,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 17:43:34,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-12-06 17:43:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:34,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517201878] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:34,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:34,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-06 17:43:34,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253609724] [2021-12-06 17:43:34,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:34,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 17:43:34,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:34,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 17:43:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:43:34,746 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:35,035 INFO L93 Difference]: Finished difference Result 195 states and 216 transitions. [2021-12-06 17:43:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:43:35,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 17:43:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:35,037 INFO L225 Difference]: With dead ends: 195 [2021-12-06 17:43:35,037 INFO L226 Difference]: Without dead ends: 181 [2021-12-06 17:43:35,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 17:43:35,038 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 91 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:35,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 261 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 192 Invalid, 0 Unknown, 154 Unchecked, 0.1s Time] [2021-12-06 17:43:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-06 17:43:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 149. [2021-12-06 17:43:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.1655172413793105) internal successors, (169), 148 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-12-06 17:43:35,041 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 27 [2021-12-06 17:43:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:35,041 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-12-06 17:43:35,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-12-06 17:43:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:43:35,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:35,041 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:35,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 17:43:35,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:35,243 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash 831251234, now seen corresponding path program 4 times [2021-12-06 17:43:35,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:35,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561077484] [2021-12-06 17:43:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:35,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:35,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:35,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561077484] [2021-12-06 17:43:35,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561077484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:35,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496061443] [2021-12-06 17:43:35,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:43:35,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:35,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:35,501 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:35,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 17:43:35,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:43:35,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:35,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 17:43:35,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:35,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:35,684 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 14 treesize of output 10 [2021-12-06 17:43:35,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:43:35,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:43:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:35,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:35,870 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_436 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_436) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2021-12-06 17:43:35,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:35,875 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-06 17:43:35,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:35,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-12-06 17:43:35,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:43:36,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:36,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496061443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:36,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:36,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2021-12-06 17:43:36,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528163416] [2021-12-06 17:43:36,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:36,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 17:43:36,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:36,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 17:43:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=884, Unknown=1, NotChecked=60, Total=1056 [2021-12-06 17:43:36,025 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:36,577 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2021-12-06 17:43:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 17:43:36,577 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 17:43:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:36,578 INFO L225 Difference]: With dead ends: 191 [2021-12-06 17:43:36,578 INFO L226 Difference]: Without dead ends: 167 [2021-12-06 17:43:36,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=2294, Unknown=1, NotChecked=100, Total=2756 [2021-12-06 17:43:36,579 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:36,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 535 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 461 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2021-12-06 17:43:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-06 17:43:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2021-12-06 17:43:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 147 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2021-12-06 17:43:36,582 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 28 [2021-12-06 17:43:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:36,582 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2021-12-06 17:43:36,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2021-12-06 17:43:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:43:36,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:36,583 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:36,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 17:43:36,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 17:43:36,784 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash 697237728, now seen corresponding path program 1 times [2021-12-06 17:43:36,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:36,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178894022] [2021-12-06 17:43:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:36,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:37,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178894022] [2021-12-06 17:43:37,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178894022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087625595] [2021-12-06 17:43:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:37,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:37,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:37,046 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:37,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 17:43:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 17:43:37,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:37,278 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 17 treesize of output 13 [2021-12-06 17:43:37,329 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-12-06 17:43:37,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:43:37,544 INFO L354 Elim1Store]: treesize reduction 38, result has 26.9 percent of original size [2021-12-06 17:43:37,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 27 [2021-12-06 17:43:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:37,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:39,622 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2021-12-06 17:43:39,633 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 17:43:39,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2021-12-06 17:43:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:39,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087625595] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:39,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:39,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2021-12-06 17:43:39,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866877189] [2021-12-06 17:43:39,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:39,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 17:43:39,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 17:43:39,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1109, Unknown=1, NotChecked=68, Total=1332 [2021-12-06 17:43:39,793 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:41,152 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|))) (and (or (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 1)) (<= (+ 2 |c_ULTIMATE.start_main_~n~0#1|) .cse0)) (<= (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~length1~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (and (<= (+ |c_ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~length1~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~length1~0#1| (* |ULTIMATE.start_main_~n~0#1| (- 1)))) 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 3))) (= |c_ULTIMATE.start_main_~length2~0#1| 1) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse1 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) (<= 1 |c_ULTIMATE.start_main_~n~0#1|) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse2 1) 0) (= (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) (< .cse0 (+ 3 |c_ULTIMATE.start_main_~n~0#1|)) (<= |c_ULTIMATE.start_main_~length1~0#1| 3))) is different from false [2021-12-06 17:43:43,160 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|))) (and (or (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 1)) (<= (+ 2 |c_ULTIMATE.start_main_~n~0#1|) .cse0)) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~length2~0#1|) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse1 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) (<= 1 |c_ULTIMATE.start_main_~n~0#1|) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse2 1) 0) (= (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) (< .cse0 (+ 3 |c_ULTIMATE.start_main_~n~0#1|)))) is different from false [2021-12-06 17:43:43,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:43,284 INFO L93 Difference]: Finished difference Result 218 states and 237 transitions. [2021-12-06 17:43:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 17:43:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 17:43:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:43,285 INFO L225 Difference]: With dead ends: 218 [2021-12-06 17:43:43,285 INFO L226 Difference]: Without dead ends: 208 [2021-12-06 17:43:43,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=311, Invalid=1860, Unknown=3, NotChecked=276, Total=2450 [2021-12-06 17:43:43,287 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 195 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:43,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 570 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 342 Invalid, 0 Unknown, 187 Unchecked, 0.1s Time] [2021-12-06 17:43:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-06 17:43:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2021-12-06 17:43:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 151 states have (on average 1.1523178807947019) internal successors, (174), 154 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2021-12-06 17:43:43,290 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 28 [2021-12-06 17:43:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:43,290 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2021-12-06 17:43:43,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2021-12-06 17:43:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:43:43,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:43,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:43,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 17:43:43,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 17:43:43,492 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:43,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1853207525, now seen corresponding path program 5 times [2021-12-06 17:43:43,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:43,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355430222] [2021-12-06 17:43:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:43,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:43,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:43,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355430222] [2021-12-06 17:43:43,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355430222] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:43,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278088230] [2021-12-06 17:43:43,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:43:43,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:43,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:43,631 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:43,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 17:43:43,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 17:43:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:43,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:43:43,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:43,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:43,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:43:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:43,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:44,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278088230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:44,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:44,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2021-12-06 17:43:44,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143334682] [2021-12-06 17:43:44,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:44,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 17:43:44,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:44,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 17:43:44,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:43:44,051 INFO L87 Difference]: Start difference. First operand 155 states and 174 transitions. Second operand has 28 states, 27 states have (on average 2.888888888888889) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:44,515 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2021-12-06 17:43:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:43:44,515 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.888888888888889) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 17:43:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:44,516 INFO L225 Difference]: With dead ends: 230 [2021-12-06 17:43:44,516 INFO L226 Difference]: Without dead ends: 223 [2021-12-06 17:43:44,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1697, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 17:43:44,517 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 340 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:44,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 508 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:43:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-06 17:43:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 175. [2021-12-06 17:43:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.1461988304093567) internal successors, (196), 174 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2021-12-06 17:43:44,521 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 32 [2021-12-06 17:43:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:44,521 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2021-12-06 17:43:44,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.888888888888889) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2021-12-06 17:43:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 17:43:44,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:44,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:44,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 17:43:44,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:44,723 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:44,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:44,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1478995618, now seen corresponding path program 6 times [2021-12-06 17:43:44,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:44,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078381990] [2021-12-06 17:43:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:44,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:44,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:44,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078381990] [2021-12-06 17:43:44,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078381990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:44,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034330095] [2021-12-06 17:43:44,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:43:44,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:44,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:44,945 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:44,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 17:43:45,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 17:43:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 17:43:45,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:45,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:45,191 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 17 treesize of output 13 [2021-12-06 17:43:45,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:43:45,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:43:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:45,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:45,323 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_534) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-06 17:43:45,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:45,327 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-06 17:43:45,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:45,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-12-06 17:43:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:43:45,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:45,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034330095] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:45,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:45,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 32 [2021-12-06 17:43:45,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963067610] [2021-12-06 17:43:45,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:45,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 17:43:45,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 17:43:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=827, Unknown=1, NotChecked=58, Total=992 [2021-12-06 17:43:45,482 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:45,839 INFO L93 Difference]: Finished difference Result 248 states and 270 transitions. [2021-12-06 17:43:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 17:43:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 17:43:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:45,841 INFO L225 Difference]: With dead ends: 248 [2021-12-06 17:43:45,841 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 17:43:45,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=1377, Unknown=1, NotChecked=78, Total=1722 [2021-12-06 17:43:45,842 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 143 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:45,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 717 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 510 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2021-12-06 17:43:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 17:43:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 184. [2021-12-06 17:43:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 183 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 205 transitions. [2021-12-06 17:43:45,845 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 205 transitions. Word has length 34 [2021-12-06 17:43:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:45,845 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 205 transitions. [2021-12-06 17:43:45,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 205 transitions. [2021-12-06 17:43:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 17:43:45,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:45,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:45,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-06 17:43:46,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 17:43:46,047 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1456363364, now seen corresponding path program 2 times [2021-12-06 17:43:46,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:46,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601190023] [2021-12-06 17:43:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:46,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:46,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601190023] [2021-12-06 17:43:46,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601190023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:46,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745146990] [2021-12-06 17:43:46,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:43:46,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:46,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:46,421 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:46,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 17:43:46,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:43:46,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:46,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 17:43:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:46,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:46,635 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 17 treesize of output 13 [2021-12-06 17:43:46,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:43:47,076 INFO L354 Elim1Store]: treesize reduction 63, result has 20.3 percent of original size [2021-12-06 17:43:47,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 30 [2021-12-06 17:43:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:47,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:47,797 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_569 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_569) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2021-12-06 17:43:47,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:47,804 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-12-06 17:43:47,824 INFO L354 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2021-12-06 17:43:47,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 90 [2021-12-06 17:43:47,831 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 17:43:47,831 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 32 treesize of output 22 [2021-12-06 17:43:48,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:48,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745146990] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:48,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:48,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2021-12-06 17:43:48,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219753673] [2021-12-06 17:43:48,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:48,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 17:43:48,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:48,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 17:43:48,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1536, Unknown=1, NotChecked=80, Total=1806 [2021-12-06 17:43:48,238 INFO L87 Difference]: Start difference. First operand 184 states and 205 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:49,154 INFO L93 Difference]: Finished difference Result 249 states and 274 transitions. [2021-12-06 17:43:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:43:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 17:43:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:49,155 INFO L225 Difference]: With dead ends: 249 [2021-12-06 17:43:49,155 INFO L226 Difference]: Without dead ends: 237 [2021-12-06 17:43:49,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=476, Invalid=3067, Unknown=1, NotChecked=116, Total=3660 [2021-12-06 17:43:49,157 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 188 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:49,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 384 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 440 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2021-12-06 17:43:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-06 17:43:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 198. [2021-12-06 17:43:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.1443298969072164) internal successors, (222), 197 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 222 transitions. [2021-12-06 17:43:49,160 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 222 transitions. Word has length 34 [2021-12-06 17:43:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:49,160 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 222 transitions. [2021-12-06 17:43:49,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 222 transitions. [2021-12-06 17:43:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:43:49,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:49,161 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:49,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 17:43:49,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 17:43:49,362 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:49,362 INFO L85 PathProgramCache]: Analyzing trace with hash 423361944, now seen corresponding path program 2 times [2021-12-06 17:43:49,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:49,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897621612] [2021-12-06 17:43:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:49,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:43:49,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:49,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897621612] [2021-12-06 17:43:49,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897621612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:49,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400550230] [2021-12-06 17:43:49,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:43:49,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:49,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:49,433 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:49,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 17:43:49,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:43:49,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:49,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:43:49,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:49,508 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:43:49,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:43:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:43:49,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:43:49,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400550230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:49,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:49,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-06 17:43:49,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865356229] [2021-12-06 17:43:49,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:49,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:43:49,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:49,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:43:49,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:43:49,685 INFO L87 Difference]: Start difference. First operand 198 states and 222 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:49,840 INFO L93 Difference]: Finished difference Result 291 states and 322 transitions. [2021-12-06 17:43:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:43:49,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 17:43:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:49,841 INFO L225 Difference]: With dead ends: 291 [2021-12-06 17:43:49,842 INFO L226 Difference]: Without dead ends: 251 [2021-12-06 17:43:49,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:43:49,843 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 113 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:49,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 174 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:43:49,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-06 17:43:49,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 200. [2021-12-06 17:43:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.1428571428571428) internal successors, (224), 199 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 224 transitions. [2021-12-06 17:43:49,846 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 224 transitions. Word has length 37 [2021-12-06 17:43:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:49,846 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 224 transitions. [2021-12-06 17:43:49,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 224 transitions. [2021-12-06 17:43:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 17:43:49,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:49,847 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:49,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 17:43:50,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:50,048 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash 763708385, now seen corresponding path program 7 times [2021-12-06 17:43:50,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:50,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205999547] [2021-12-06 17:43:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:50,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:50,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:50,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205999547] [2021-12-06 17:43:50,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205999547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:50,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892461271] [2021-12-06 17:43:50,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:43:50,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:50,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:50,246 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:50,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 17:43:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:50,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 17:43:50,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:50,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:50,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:43:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:50,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:50,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892461271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:50,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:50,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2021-12-06 17:43:50,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147578795] [2021-12-06 17:43:50,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:50,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 17:43:50,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:50,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 17:43:50,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 17:43:50,831 INFO L87 Difference]: Start difference. First operand 200 states and 224 transitions. Second operand has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:51,455 INFO L93 Difference]: Finished difference Result 326 states and 357 transitions. [2021-12-06 17:43:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:43:51,455 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 17:43:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:51,456 INFO L225 Difference]: With dead ends: 326 [2021-12-06 17:43:51,456 INFO L226 Difference]: Without dead ends: 319 [2021-12-06 17:43:51,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1975, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 17:43:51,457 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 433 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:51,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 676 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:43:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-06 17:43:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 220. [2021-12-06 17:43:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 216 states have (on average 1.1388888888888888) internal successors, (246), 219 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 246 transitions. [2021-12-06 17:43:51,461 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 246 transitions. Word has length 38 [2021-12-06 17:43:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:51,461 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 246 transitions. [2021-12-06 17:43:51,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 246 transitions. [2021-12-06 17:43:51,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:43:51,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:51,462 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:51,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 17:43:51,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:51,663 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:51,663 INFO L85 PathProgramCache]: Analyzing trace with hash -515648934, now seen corresponding path program 8 times [2021-12-06 17:43:51,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:51,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846803125] [2021-12-06 17:43:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:51,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:51,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846803125] [2021-12-06 17:43:51,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846803125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769722694] [2021-12-06 17:43:51,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:43:51,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:51,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:51,890 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:51,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 17:43:51,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:43:51,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:51,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 17:43:51,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:51,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:52,228 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 17 treesize of output 13 [2021-12-06 17:43:52,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:43:52,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:43:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:52,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:52,499 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_681 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_681) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-06 17:43:52,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:52,503 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-06 17:43:52,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:52,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-12-06 17:43:52,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:43:52,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:52,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769722694] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:52,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:52,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 39 [2021-12-06 17:43:52,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53042235] [2021-12-06 17:43:52,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:52,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:43:52,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:52,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:43:52,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1278, Unknown=1, NotChecked=72, Total=1482 [2021-12-06 17:43:52,736 INFO L87 Difference]: Start difference. First operand 220 states and 246 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:53,203 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2021-12-06 17:43:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:43:53,204 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 17:43:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:53,205 INFO L225 Difference]: With dead ends: 289 [2021-12-06 17:43:53,205 INFO L226 Difference]: Without dead ends: 258 [2021-12-06 17:43:53,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=2399, Unknown=1, NotChecked=100, Total=2756 [2021-12-06 17:43:53,206 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:53,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 699 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 574 Invalid, 0 Unknown, 134 Unchecked, 0.2s Time] [2021-12-06 17:43:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-06 17:43:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 229. [2021-12-06 17:43:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 225 states have (on average 1.1333333333333333) internal successors, (255), 228 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 255 transitions. [2021-12-06 17:43:53,209 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 255 transitions. Word has length 40 [2021-12-06 17:43:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:53,209 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 255 transitions. [2021-12-06 17:43:53,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:53,210 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 255 transitions. [2021-12-06 17:43:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:43:53,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:53,210 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:53,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 17:43:53,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:53,411 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:43:53,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:53,411 INFO L85 PathProgramCache]: Analyzing trace with hash -910015720, now seen corresponding path program 3 times [2021-12-06 17:43:53,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:53,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779835174] [2021-12-06 17:43:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:53,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:53,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:53,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779835174] [2021-12-06 17:43:53,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779835174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:53,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503462650] [2021-12-06 17:43:53,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:43:53,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:53,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:53,960 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:53,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 17:43:54,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 17:43:54,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 17:43:54,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:54,358 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 17 treesize of output 13 [2021-12-06 17:43:54,411 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-12-06 17:43:54,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:43:54,957 INFO L354 Elim1Store]: treesize reduction 52, result has 33.3 percent of original size [2021-12-06 17:43:54,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 47 [2021-12-06 17:43:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:54,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:56,681 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)))) is different from false [2021-12-06 17:43:56,692 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-06 17:43:56,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 213 [2021-12-06 17:43:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:57,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503462650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:57,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:57,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 52 [2021-12-06 17:43:57,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522846943] [2021-12-06 17:43:57,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:57,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 17:43:57,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 17:43:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2314, Unknown=1, NotChecked=98, Total=2652 [2021-12-06 17:43:57,090 INFO L87 Difference]: Start difference. First operand 229 states and 255 transitions. Second operand has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:00,005 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse11 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|)) (.cse12 (+ 3 |c_ULTIMATE.start_main_~n~0#1|))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1| 1)) (.cse7 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) (.cse8 (< 5 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse9 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (.cse3 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4))) (.cse4 (+ 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse0 (= .cse12 |c_ULTIMATE.start_main_~length1~0#1|)) (.cse2 (< .cse11 .cse12)) (.cse6 (<= 2 |c_ULTIMATE.start_main_~n~0#1|))) (and (or .cse0 (<= .cse1 |c_ULTIMATE.start_main_~length1~0#1|) .cse2) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (or .cse3 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 1)) .cse0 (= |c_ULTIMATE.start_main_~length1~0#1| .cse4)) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (and (or (= (select .cse5 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) .cse6) (= (select .cse5 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse5 1) 0))) (or (not (= |c_ULTIMATE.start_main_~length1~0#1| .cse1)) (and (<= |c_ULTIMATE.start_main_~i~0#1| 3) (<= 3 |c_ULTIMATE.start_main_~i~0#1|))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse7 (or .cse7 .cse8) (or .cse9 .cse8) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) .cse9 (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse10 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse10 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse10 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse10 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse10 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)))) (or .cse3 (= .cse4 .cse11) (and (or .cse0 .cse2) .cse6))))) is different from false [2021-12-06 17:44:02,214 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (<= 2 |c_ULTIMATE.start_main_~n~0#1|))) (and (<= (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~length1~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (and (<= (+ |c_ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~length1~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~length1~0#1| (* |ULTIMATE.start_main_~n~0#1| (- 1)))) 0) (<= |ULTIMATE.start_main_~length1~0#1| 5) (<= 1 |ULTIMATE.start_main_~n~0#1|))) (= |c_ULTIMATE.start_main_~length2~0#1| 1) (<= |c_ULTIMATE.start_main_~length1~0#1| 5) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (and (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) .cse1) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 1) 0))) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~n~0#1|) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse2 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|))) (or (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4)) (= (+ 2 |c_ULTIMATE.start_main_~n~0#1|) .cse3) (and (let ((.cse4 (+ 3 |c_ULTIMATE.start_main_~n~0#1|))) (or (= .cse4 |c_ULTIMATE.start_main_~length1~0#1|) (< .cse3 .cse4))) .cse1))))) is different from false [2021-12-06 17:44:03,272 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse10 (+ 3 |c_ULTIMATE.start_main_~n~0#1|))) (let ((.cse5 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) (.cse6 (< 5 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse7 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (.cse0 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4))) (.cse2 (+ 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse1 (= .cse10 |c_ULTIMATE.start_main_~length1~0#1|)) (.cse4 (<= 2 |c_ULTIMATE.start_main_~n~0#1|))) (and (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (or .cse0 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 1)) .cse1 (= |c_ULTIMATE.start_main_~length1~0#1| .cse2)) (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (and (or (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) .cse4) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse3 1) 0))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse5 (or .cse5 .cse6) (or .cse7 .cse6) .cse7 (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse8 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse8 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse8 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse8 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse8 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)))) (let ((.cse9 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|))) (or .cse0 (= .cse2 .cse9) (and (or .cse1 (< .cse9 .cse10)) .cse4)))))) is different from false [2021-12-06 17:44:05,283 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (+ 3 |c_ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (= .cse2 |c_ULTIMATE.start_main_~length1~0#1|)) (.cse1 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1| 1)) (.cse4 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) (.cse5 (< 5 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse6 (<= 1 |c_ULTIMATE.start_main_~n~0#1|))) (and (or .cse0 (<= .cse1 |c_ULTIMATE.start_main_~length1~0#1|) (< (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|) .cse2)) (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (or (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 1)) .cse0 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 2 |c_ULTIMATE.start_main_~n~0#1|))) (or (not (= |c_ULTIMATE.start_main_~length1~0#1| .cse1)) (and (<= |c_ULTIMATE.start_main_~i~0#1| 3) (<= 3 |c_ULTIMATE.start_main_~i~0#1|))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse4 (or .cse4 .cse5) (or .cse6 .cse5) .cse6 (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse7 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse7 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse7 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse7 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0))))))) is different from false [2021-12-06 17:44:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:09,313 INFO L93 Difference]: Finished difference Result 416 states and 452 transitions. [2021-12-06 17:44:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 17:44:09,313 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 17:44:09,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:09,315 INFO L225 Difference]: With dead ends: 416 [2021-12-06 17:44:09,315 INFO L226 Difference]: Without dead ends: 390 [2021-12-06 17:44:09,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=906, Invalid=8039, Unknown=5, NotChecked=950, Total=9900 [2021-12-06 17:44:09,318 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 539 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:09,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 692 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 825 Invalid, 0 Unknown, 343 Unchecked, 0.4s Time] [2021-12-06 17:44:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-06 17:44:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 244. [2021-12-06 17:44:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 240 states have (on average 1.1375) internal successors, (273), 243 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 273 transitions. [2021-12-06 17:44:09,322 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 273 transitions. Word has length 40 [2021-12-06 17:44:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:09,322 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 273 transitions. [2021-12-06 17:44:09,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 273 transitions. [2021-12-06 17:44:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:44:09,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:09,323 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:09,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 17:44:09,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:09,523 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2063863029, now seen corresponding path program 1 times [2021-12-06 17:44:09,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:09,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178413314] [2021-12-06 17:44:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:09,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:44:09,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178413314] [2021-12-06 17:44:09,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178413314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:09,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258183745] [2021-12-06 17:44:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:09,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:09,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:09,621 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:09,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 17:44:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:09,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 17:44:09,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:09,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:09,800 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 14 treesize of output 10 [2021-12-06 17:44:09,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:44:09,981 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 17:44:09,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-06 17:44:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:09,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:10,043 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_762) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2021-12-06 17:44:10,048 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_762) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2021-12-06 17:44:10,055 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_762) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 1 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0)) is different from false [2021-12-06 17:44:10,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_762 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_762) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2021-12-06 17:44:10,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:10,062 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:44:10,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:10,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 17:44:10,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:44:10,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 17:44:10,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258183745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:10,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:10,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 36 [2021-12-06 17:44:10,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698770651] [2021-12-06 17:44:10,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:10,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 17:44:10,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:10,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 17:44:10,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=883, Unknown=4, NotChecked=252, Total=1260 [2021-12-06 17:44:10,278 INFO L87 Difference]: Start difference. First operand 244 states and 273 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:11,098 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2021-12-06 17:44:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 17:44:11,098 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 17:44:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:11,099 INFO L225 Difference]: With dead ends: 295 [2021-12-06 17:44:11,099 INFO L226 Difference]: Without dead ends: 289 [2021-12-06 17:44:11,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=667, Invalid=3767, Unknown=4, NotChecked=532, Total=4970 [2021-12-06 17:44:11,101 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 281 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:11,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 409 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 355 Invalid, 0 Unknown, 310 Unchecked, 0.1s Time] [2021-12-06 17:44:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-06 17:44:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 246. [2021-12-06 17:44:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 242 states have (on average 1.1363636363636365) internal successors, (275), 245 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 275 transitions. [2021-12-06 17:44:11,104 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 275 transitions. Word has length 41 [2021-12-06 17:44:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:11,105 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 275 transitions. [2021-12-06 17:44:11,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 275 transitions. [2021-12-06 17:44:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:44:11,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:11,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:11,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 17:44:11,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 17:44:11,307 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:11,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:11,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1091941255, now seen corresponding path program 1 times [2021-12-06 17:44:11,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:11,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107000941] [2021-12-06 17:44:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:11,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:44:11,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:11,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107000941] [2021-12-06 17:44:11,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107000941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:11,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128369877] [2021-12-06 17:44:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:11,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:11,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:11,445 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:11,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 17:44:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:11,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 17:44:11,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:11,523 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:44:11,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:44:11,630 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 14 treesize of output 10 [2021-12-06 17:44:11,800 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:44:11,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-06 17:44:11,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-06 17:44:11,956 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 17:44:11,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 17:44:11,994 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:44:11,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 17:44:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:12,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:12,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:12,317 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:44:12,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:12,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 17:44:12,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:44:14,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2021-12-06 17:44:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:14,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128369877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:14,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:14,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 46 [2021-12-06 17:44:14,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773876441] [2021-12-06 17:44:14,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:14,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:44:14,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:44:14,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1890, Unknown=14, NotChecked=0, Total=2070 [2021-12-06 17:44:14,753 INFO L87 Difference]: Start difference. First operand 246 states and 275 transitions. Second operand has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:15,459 INFO L93 Difference]: Finished difference Result 328 states and 359 transitions. [2021-12-06 17:44:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 17:44:15,459 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 17:44:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:15,460 INFO L225 Difference]: With dead ends: 328 [2021-12-06 17:44:15,460 INFO L226 Difference]: Without dead ends: 304 [2021-12-06 17:44:15,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=417, Invalid=4399, Unknown=14, NotChecked=0, Total=4830 [2021-12-06 17:44:15,461 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 190 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:15,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 480 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 259 Invalid, 0 Unknown, 319 Unchecked, 0.1s Time] [2021-12-06 17:44:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-06 17:44:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2021-12-06 17:44:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.1391304347826088) internal successors, (262), 233 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 262 transitions. [2021-12-06 17:44:15,465 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 262 transitions. Word has length 42 [2021-12-06 17:44:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 262 transitions. [2021-12-06 17:44:15,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 262 transitions. [2021-12-06 17:44:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:44:15,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:15,465 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:15,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 17:44:15,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 17:44:15,667 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:15,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash 734238365, now seen corresponding path program 9 times [2021-12-06 17:44:15,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:15,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113064651] [2021-12-06 17:44:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:15,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:15,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:15,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113064651] [2021-12-06 17:44:15,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113064651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:15,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490708561] [2021-12-06 17:44:15,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:44:15,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:15,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:15,821 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:15,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 17:44:15,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 17:44:15,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 17:44:15,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:15,926 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:44:15,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:44:16,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:44:16,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:16,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 17:44:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:16,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:16,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-12-06 17:44:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:17,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490708561] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:17,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:17,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 47 [2021-12-06 17:44:17,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717633039] [2021-12-06 17:44:17,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:17,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 17:44:17,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 17:44:17,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2017, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 17:44:17,185 INFO L87 Difference]: Start difference. First operand 234 states and 262 transitions. Second operand has 48 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:18,414 INFO L93 Difference]: Finished difference Result 392 states and 428 transitions. [2021-12-06 17:44:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 17:44:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 17:44:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:18,416 INFO L225 Difference]: With dead ends: 392 [2021-12-06 17:44:18,416 INFO L226 Difference]: Without dead ends: 385 [2021-12-06 17:44:18,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=837, Invalid=4565, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 17:44:18,417 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 593 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:18,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 849 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1441 Invalid, 0 Unknown, 145 Unchecked, 0.5s Time] [2021-12-06 17:44:18,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-06 17:44:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 254. [2021-12-06 17:44:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.136) internal successors, (284), 253 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 284 transitions. [2021-12-06 17:44:18,421 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 284 transitions. Word has length 44 [2021-12-06 17:44:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:18,421 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 284 transitions. [2021-12-06 17:44:18,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 284 transitions. [2021-12-06 17:44:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 17:44:18,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:18,422 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:18,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 17:44:18,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 17:44:18,623 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1097682670, now seen corresponding path program 2 times [2021-12-06 17:44:18,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:18,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830567259] [2021-12-06 17:44:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:18,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:18,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:18,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830567259] [2021-12-06 17:44:18,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830567259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:18,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542875384] [2021-12-06 17:44:18,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:44:18,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:18,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:18,774 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:18,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 17:44:18,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:44:18,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 17:44:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:18,956 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 14 treesize of output 10 [2021-12-06 17:44:19,162 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 17:44:19,162 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 2 case distinctions, treesize of input 32 treesize of output 42 [2021-12-06 17:44:19,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:19,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-12-06 17:44:19,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:19,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:19,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2021-12-06 17:44:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:44:19,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:19,404 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_cstrncat_#t~mem6#1| 0) (forall ((v_ArrVal_892 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_892) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0))) is different from false [2021-12-06 17:44:19,409 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_892 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_892) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_#t~post5#1.base|) |c_ULTIMATE.start_cstrncat_#t~post5#1.offset|) 0)) is different from false [2021-12-06 17:44:19,413 WARN L838 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0) (forall ((v_ArrVal_892 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_892) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0))) is different from false [2021-12-06 17:44:19,452 WARN L838 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0) (forall ((v_ArrVal_892 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_892) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0) (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) 0))))) is different from false [2021-12-06 17:44:19,465 WARN L838 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) |c_ULTIMATE.start_cstrncat_~src#1.offset|) 0) (forall ((v_ArrVal_892 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~dst#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_892) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 1 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0)))) is different from false [2021-12-06 17:44:19,475 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_892 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_892) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0) (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) is different from false [2021-12-06 17:44:19,498 INFO L354 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2021-12-06 17:44:19,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 85 [2021-12-06 17:44:19,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:19,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 51 [2021-12-06 17:44:19,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:44:19,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:19,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-06 17:44:19,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:19,549 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 66 treesize of output 70 [2021-12-06 17:44:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 3 not checked. [2021-12-06 17:44:19,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542875384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:19,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:19,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 46 [2021-12-06 17:44:19,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059286921] [2021-12-06 17:44:19,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:19,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:44:19,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:44:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1431, Unknown=6, NotChecked=486, Total=2070 [2021-12-06 17:44:19,780 INFO L87 Difference]: Start difference. First operand 254 states and 284 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:21,788 INFO L93 Difference]: Finished difference Result 390 states and 426 transitions. [2021-12-06 17:44:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 17:44:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-06 17:44:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:21,790 INFO L225 Difference]: With dead ends: 390 [2021-12-06 17:44:21,790 INFO L226 Difference]: Without dead ends: 348 [2021-12-06 17:44:21,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 6 IntricatePredicates, 2 DeprecatedPredicates, 3249 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1103, Invalid=10045, Unknown=6, NotChecked=1278, Total=12432 [2021-12-06 17:44:21,791 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 442 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 737 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:21,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 386 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 295 Invalid, 0 Unknown, 737 Unchecked, 0.2s Time] [2021-12-06 17:44:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-12-06 17:44:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 276. [2021-12-06 17:44:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 272 states have (on average 1.1323529411764706) internal successors, (308), 275 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 308 transitions. [2021-12-06 17:44:21,795 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 308 transitions. Word has length 45 [2021-12-06 17:44:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:21,795 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 308 transitions. [2021-12-06 17:44:21,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 308 transitions. [2021-12-06 17:44:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 17:44:21,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:21,796 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:21,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 17:44:21,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 17:44:21,996 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1228432918, now seen corresponding path program 10 times [2021-12-06 17:44:21,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:21,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976152888] [2021-12-06 17:44:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:21,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:22,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:22,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976152888] [2021-12-06 17:44:22,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976152888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:22,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707667683] [2021-12-06 17:44:22,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:44:22,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:22,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:22,250 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:22,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 17:44:22,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:44:22,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:22,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 17:44:22,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:22,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:22,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:44:22,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:44:22,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-06 17:44:23,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:23,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 17:44:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:23,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:23,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:23,576 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-06 17:44:23,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:23,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-12-06 17:44:23,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 17:44:24,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:24,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:24,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707667683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:24,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:24,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 55 [2021-12-06 17:44:24,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445001840] [2021-12-06 17:44:24,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:24,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 17:44:24,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:24,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 17:44:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2716, Unknown=1, NotChecked=0, Total=2970 [2021-12-06 17:44:24,267 INFO L87 Difference]: Start difference. First operand 276 states and 308 transitions. Second operand has 55 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:25,287 INFO L93 Difference]: Finished difference Result 369 states and 404 transitions. [2021-12-06 17:44:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 17:44:25,288 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-06 17:44:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:25,289 INFO L225 Difference]: With dead ends: 369 [2021-12-06 17:44:25,289 INFO L226 Difference]: Without dead ends: 334 [2021-12-06 17:44:25,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=554, Invalid=5451, Unknown=1, NotChecked=0, Total=6006 [2021-12-06 17:44:25,290 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 145 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:25,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 941 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 571 Invalid, 0 Unknown, 260 Unchecked, 0.2s Time] [2021-12-06 17:44:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-06 17:44:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 285. [2021-12-06 17:44:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 281 states have (on average 1.1281138790035588) internal successors, (317), 284 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 317 transitions. [2021-12-06 17:44:25,293 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 317 transitions. Word has length 46 [2021-12-06 17:44:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:25,293 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 317 transitions. [2021-12-06 17:44:25,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 317 transitions. [2021-12-06 17:44:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 17:44:25,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:25,294 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:25,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-06 17:44:25,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:25,495 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1476579412, now seen corresponding path program 4 times [2021-12-06 17:44:25,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:25,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506888952] [2021-12-06 17:44:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:25,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:26,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:26,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506888952] [2021-12-06 17:44:26,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506888952] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:26,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471865289] [2021-12-06 17:44:26,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:44:26,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:26,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:26,599 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:26,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 17:44:26,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:44:26,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:26,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 17:44:26,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:26,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:27,043 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 17 treesize of output 13 [2021-12-06 17:44:27,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:44:27,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:44:27,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:27,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 23 [2021-12-06 17:44:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:27,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:27,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-06 17:44:28,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:28,077 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 73 [2021-12-06 17:44:28,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:28,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 176 [2021-12-06 17:44:28,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:28,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 36 [2021-12-06 17:44:29,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:29,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471865289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:29,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:29,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 59 [2021-12-06 17:44:29,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768893326] [2021-12-06 17:44:29,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:29,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 17:44:29,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:29,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 17:44:29,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=3161, Unknown=1, NotChecked=0, Total=3422 [2021-12-06 17:44:29,179 INFO L87 Difference]: Start difference. First operand 285 states and 317 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:31,989 INFO L93 Difference]: Finished difference Result 410 states and 450 transitions. [2021-12-06 17:44:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 17:44:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-06 17:44:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:31,991 INFO L225 Difference]: With dead ends: 410 [2021-12-06 17:44:31,991 INFO L226 Difference]: Without dead ends: 380 [2021-12-06 17:44:31,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=906, Invalid=8993, Unknown=1, NotChecked=0, Total=9900 [2021-12-06 17:44:31,992 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 318 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:31,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 529 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1117 Invalid, 0 Unknown, 126 Unchecked, 0.6s Time] [2021-12-06 17:44:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-12-06 17:44:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 310. [2021-12-06 17:44:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.130718954248366) internal successors, (346), 309 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 346 transitions. [2021-12-06 17:44:31,996 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 346 transitions. Word has length 46 [2021-12-06 17:44:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:31,996 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 346 transitions. [2021-12-06 17:44:31,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:31,996 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 346 transitions. [2021-12-06 17:44:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 17:44:31,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:31,997 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:32,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-06 17:44:32,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:32,198 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1193977735, now seen corresponding path program 1 times [2021-12-06 17:44:32,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:32,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039789527] [2021-12-06 17:44:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:32,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:44:32,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039789527] [2021-12-06 17:44:32,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039789527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722622829] [2021-12-06 17:44:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:32,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:32,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:32,343 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:32,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 17:44:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:32,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 17:44:32,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:32,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:44:32,723 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:44:32,723 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 17 treesize of output 23 [2021-12-06 17:44:32,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-06 17:44:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:32,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:32,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2021-12-06 17:44:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:44:33,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:33,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:33,436 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:44:33,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:33,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 17:44:33,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:44:33,653 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:44:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:44:33,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722622829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:33,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:33,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 51 [2021-12-06 17:44:33,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466359437] [2021-12-06 17:44:33,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:33,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 17:44:33,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:33,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 17:44:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2374, Unknown=1, NotChecked=0, Total=2550 [2021-12-06 17:44:33,766 INFO L87 Difference]: Start difference. First operand 310 states and 346 transitions. Second operand has 51 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:35,416 INFO L93 Difference]: Finished difference Result 576 states and 632 transitions. [2021-12-06 17:44:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 17:44:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-06 17:44:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:35,419 INFO L225 Difference]: With dead ends: 576 [2021-12-06 17:44:35,419 INFO L226 Difference]: Without dead ends: 552 [2021-12-06 17:44:35,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2413 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=951, Invalid=8750, Unknown=1, NotChecked=0, Total=9702 [2021-12-06 17:44:35,420 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 364 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:35,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 403 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 480 Invalid, 0 Unknown, 430 Unchecked, 0.2s Time] [2021-12-06 17:44:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-12-06 17:44:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 372. [2021-12-06 17:44:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 368 states have (on average 1.138586956521739) internal successors, (419), 371 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 419 transitions. [2021-12-06 17:44:35,425 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 419 transitions. Word has length 47 [2021-12-06 17:44:35,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:35,425 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 419 transitions. [2021-12-06 17:44:35,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 419 transitions. [2021-12-06 17:44:35,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 17:44:35,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:35,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:35,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-06 17:44:35,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:35,627 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 994210165, now seen corresponding path program 2 times [2021-12-06 17:44:35,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:35,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543729191] [2021-12-06 17:44:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:35,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 17:44:35,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:35,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543729191] [2021-12-06 17:44:35,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543729191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:35,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103478913] [2021-12-06 17:44:35,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:44:35,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:35,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:35,824 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:35,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 17:44:35,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:44:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 17:44:35,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:35,910 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:44:35,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:44:35,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:36,043 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 [2021-12-06 17:44:36,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:44:36,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:36,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 17:44:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 17:44:36,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:36,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:36,636 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-06 17:44:36,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:36,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 17:44:36,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 17:44:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 17:44:37,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103478913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:37,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:37,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2021-12-06 17:44:37,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140266855] [2021-12-06 17:44:37,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:37,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 17:44:37,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 17:44:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1170, Unknown=40, NotChecked=0, Total=1332 [2021-12-06 17:44:37,029 INFO L87 Difference]: Start difference. First operand 372 states and 419 transitions. Second operand has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:37,469 INFO L93 Difference]: Finished difference Result 481 states and 529 transitions. [2021-12-06 17:44:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:44:37,469 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 17:44:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:37,471 INFO L225 Difference]: With dead ends: 481 [2021-12-06 17:44:37,471 INFO L226 Difference]: Without dead ends: 401 [2021-12-06 17:44:37,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=316, Invalid=2293, Unknown=43, NotChecked=0, Total=2652 [2021-12-06 17:44:37,471 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:37,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 407 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 188 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2021-12-06 17:44:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-12-06 17:44:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 332. [2021-12-06 17:44:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 328 states have (on average 1.125) internal successors, (369), 331 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 369 transitions. [2021-12-06 17:44:37,475 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 369 transitions. Word has length 48 [2021-12-06 17:44:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:37,475 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 369 transitions. [2021-12-06 17:44:37,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 369 transitions. [2021-12-06 17:44:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 17:44:37,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:37,476 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:37,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 17:44:37,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 17:44:37,677 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1776899047, now seen corresponding path program 11 times [2021-12-06 17:44:37,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:37,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250473693] [2021-12-06 17:44:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:37,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:37,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:37,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250473693] [2021-12-06 17:44:37,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250473693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:37,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199941385] [2021-12-06 17:44:37,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:44:37,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:37,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:37,875 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:37,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 17:44:37,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 17:44:37,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 17:44:37,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:37,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:37,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:44:37,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:38,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 66 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:38,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199941385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:38,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:38,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2021-12-06 17:44:38,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351309581] [2021-12-06 17:44:38,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:38,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 17:44:38,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:38,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 17:44:38,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1713, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 17:44:38,619 INFO L87 Difference]: Start difference. First operand 332 states and 369 transitions. Second operand has 45 states, 44 states have (on average 3.090909090909091) internal successors, (136), 45 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:39,237 INFO L93 Difference]: Finished difference Result 544 states and 593 transitions. [2021-12-06 17:44:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:44:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.090909090909091) internal successors, (136), 45 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-06 17:44:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:39,240 INFO L225 Difference]: With dead ends: 544 [2021-12-06 17:44:39,240 INFO L226 Difference]: Without dead ends: 528 [2021-12-06 17:44:39,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=712, Invalid=2828, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 17:44:39,240 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 659 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:39,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 841 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:44:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-12-06 17:44:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 354. [2021-12-06 17:44:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 350 states have (on average 1.1228571428571428) internal successors, (393), 353 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 393 transitions. [2021-12-06 17:44:39,245 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 393 transitions. Word has length 50 [2021-12-06 17:44:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:39,245 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 393 transitions. [2021-12-06 17:44:39,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.090909090909091) internal successors, (136), 45 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 393 transitions. [2021-12-06 17:44:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:44:39,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:39,246 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:39,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-06 17:44:39,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:39,447 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:39,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:39,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1797000338, now seen corresponding path program 12 times [2021-12-06 17:44:39,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:39,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125134187] [2021-12-06 17:44:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:39,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:39,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:39,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125134187] [2021-12-06 17:44:39,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125134187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:39,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429764414] [2021-12-06 17:44:39,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:44:39,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:39,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:39,763 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:39,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 17:44:39,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 17:44:39,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:39,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 17:44:39,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:39,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:40,185 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 17 treesize of output 13 [2021-12-06 17:44:40,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:44:40,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:44:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:40,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:40,466 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1164) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) is different from false [2021-12-06 17:44:40,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:40,472 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-06 17:44:40,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:40,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-12-06 17:44:40,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:44:40,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:40,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429764414] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:40,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:40,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 47 [2021-12-06 17:44:40,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027301037] [2021-12-06 17:44:40,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:40,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 17:44:40,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 17:44:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1916, Unknown=1, NotChecked=88, Total=2162 [2021-12-06 17:44:40,771 INFO L87 Difference]: Start difference. First operand 354 states and 393 transitions. Second operand has 47 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 47 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:41,589 INFO L93 Difference]: Finished difference Result 439 states and 480 transitions. [2021-12-06 17:44:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 17:44:41,589 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 47 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 17:44:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:41,590 INFO L225 Difference]: With dead ends: 439 [2021-12-06 17:44:41,591 INFO L226 Difference]: Without dead ends: 400 [2021-12-06 17:44:41,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=358, Invalid=3805, Unknown=1, NotChecked=126, Total=4290 [2021-12-06 17:44:41,591 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 125 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:41,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1083 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1225 Invalid, 0 Unknown, 133 Unchecked, 0.3s Time] [2021-12-06 17:44:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-06 17:44:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 363. [2021-12-06 17:44:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 359 states have (on average 1.1197771587743732) internal successors, (402), 362 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 402 transitions. [2021-12-06 17:44:41,595 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 402 transitions. Word has length 52 [2021-12-06 17:44:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:41,596 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 402 transitions. [2021-12-06 17:44:41,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.5531914893617023) internal successors, (120), 47 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 402 transitions. [2021-12-06 17:44:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:44:41,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:41,596 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:41,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 17:44:41,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 17:44:41,798 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:41,799 INFO L85 PathProgramCache]: Analyzing trace with hash -558804912, now seen corresponding path program 5 times [2021-12-06 17:44:41,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:41,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986619976] [2021-12-06 17:44:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:41,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 30 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:42,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:42,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986619976] [2021-12-06 17:44:42,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986619976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:42,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386621119] [2021-12-06 17:44:42,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:44:42,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:42,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:42,885 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:42,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 17:44:42,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 17:44:42,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:42,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 17:44:42,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:43,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:43,288 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 17 treesize of output 13 [2021-12-06 17:44:43,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:44:44,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:44,324 INFO L354 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2021-12-06 17:44:44,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 60 [2021-12-06 17:44:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:44,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:44,644 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1211 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1211) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)))) is different from false [2021-12-06 17:44:44,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:44,654 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 85 [2021-12-06 17:44:44,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:44:44,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 161 treesize of output 211 [2021-12-06 17:44:44,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:44,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2021-12-06 17:44:45,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 48 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:45,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386621119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:45,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:45,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 65 [2021-12-06 17:44:45,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30177615] [2021-12-06 17:44:45,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:45,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 17:44:45,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:45,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 17:44:45,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3710, Unknown=1, NotChecked=124, Total=4160 [2021-12-06 17:44:45,598 INFO L87 Difference]: Start difference. First operand 363 states and 402 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:46,826 INFO L93 Difference]: Finished difference Result 485 states and 534 transitions. [2021-12-06 17:44:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 17:44:46,826 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 17:44:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:46,828 INFO L225 Difference]: With dead ends: 485 [2021-12-06 17:44:46,828 INFO L226 Difference]: Without dead ends: 435 [2021-12-06 17:44:46,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=611, Invalid=6364, Unknown=1, NotChecked=164, Total=7140 [2021-12-06 17:44:46,828 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 316 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:46,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 675 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 507 Invalid, 0 Unknown, 362 Unchecked, 0.2s Time] [2021-12-06 17:44:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-06 17:44:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 382. [2021-12-06 17:44:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 378 states have (on average 1.1216931216931216) internal successors, (424), 381 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 424 transitions. [2021-12-06 17:44:46,833 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 424 transitions. Word has length 52 [2021-12-06 17:44:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:46,833 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 424 transitions. [2021-12-06 17:44:46,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 424 transitions. [2021-12-06 17:44:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:44:46,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:46,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:46,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 17:44:47,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 17:44:47,035 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:47,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:47,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1217377784, now seen corresponding path program 3 times [2021-12-06 17:44:47,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:47,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202205533] [2021-12-06 17:44:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:47,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:44:47,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:47,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202205533] [2021-12-06 17:44:47,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202205533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:47,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271428911] [2021-12-06 17:44:47,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:44:47,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:47,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:47,171 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:47,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 17:44:47,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:44:47,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:47,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 17:44:47,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:47,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:44:47,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:44:47,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:48,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:44:48,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271428911] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:48,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:48,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 18] total 48 [2021-12-06 17:44:48,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106441637] [2021-12-06 17:44:48,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:48,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 17:44:48,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:48,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 17:44:48,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 17:44:48,524 INFO L87 Difference]: Start difference. First operand 382 states and 424 transitions. Second operand has 48 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 48 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:52,894 INFO L93 Difference]: Finished difference Result 698 states and 750 transitions. [2021-12-06 17:44:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-06 17:44:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 48 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 17:44:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:52,897 INFO L225 Difference]: With dead ends: 698 [2021-12-06 17:44:52,897 INFO L226 Difference]: Without dead ends: 664 [2021-12-06 17:44:52,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4322 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3201, Invalid=14091, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 17:44:52,898 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1165 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:52,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 387 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 17:44:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-06 17:44:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 413. [2021-12-06 17:44:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 409 states have (on average 1.1344743276283618) internal successors, (464), 412 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 464 transitions. [2021-12-06 17:44:52,903 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 464 transitions. Word has length 52 [2021-12-06 17:44:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:52,903 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 464 transitions. [2021-12-06 17:44:52,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 48 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 464 transitions. [2021-12-06 17:44:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 17:44:52,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:52,904 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:52,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 17:44:53,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 17:44:53,105 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash -554980724, now seen corresponding path program 3 times [2021-12-06 17:44:53,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:53,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472657885] [2021-12-06 17:44:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:53,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 17:44:53,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472657885] [2021-12-06 17:44:53,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472657885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422696242] [2021-12-06 17:44:53,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:44:53,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:53,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:53,253 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:53,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 17:44:53,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:44:53,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:53,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 17:44:53,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:53,339 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:44:53,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:44:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 17:44:53,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 17:44:53,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422696242] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:53,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:53,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2021-12-06 17:44:53,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675589924] [2021-12-06 17:44:53,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:53,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 17:44:53,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:53,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 17:44:53,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:44:53,895 INFO L87 Difference]: Start difference. First operand 413 states and 464 transitions. Second operand has 32 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:54,382 INFO L93 Difference]: Finished difference Result 521 states and 569 transitions. [2021-12-06 17:44:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 17:44:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-06 17:44:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:54,385 INFO L225 Difference]: With dead ends: 521 [2021-12-06 17:44:54,385 INFO L226 Difference]: Without dead ends: 521 [2021-12-06 17:44:54,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=366, Invalid=1614, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 17:44:54,385 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 503 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:54,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 403 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:44:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-06 17:44:54,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 444. [2021-12-06 17:44:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 440 states have (on average 1.1227272727272728) internal successors, (494), 443 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 494 transitions. [2021-12-06 17:44:54,390 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 494 transitions. Word has length 53 [2021-12-06 17:44:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:54,390 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 494 transitions. [2021-12-06 17:44:54,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 494 transitions. [2021-12-06 17:44:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 17:44:54,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:54,391 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:54,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 17:44:54,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 17:44:54,592 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1402960811, now seen corresponding path program 13 times [2021-12-06 17:44:54,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:54,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877170310] [2021-12-06 17:44:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:54,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:54,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:54,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877170310] [2021-12-06 17:44:54,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877170310] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:54,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905900570] [2021-12-06 17:44:54,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:44:54,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:54,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:54,812 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:54,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 17:44:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:54,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 17:44:54,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:54,911 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:44:54,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:44:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:55,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 91 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:56,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905900570] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:56,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:56,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 59 [2021-12-06 17:44:56,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40881349] [2021-12-06 17:44:56,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:56,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 17:44:56,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 17:44:56,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=3192, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 17:44:56,727 INFO L87 Difference]: Start difference. First operand 444 states and 494 transitions. Second operand has 60 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 60 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:58,869 INFO L93 Difference]: Finished difference Result 837 states and 904 transitions. [2021-12-06 17:44:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 17:44:58,869 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 60 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 17:44:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:58,872 INFO L225 Difference]: With dead ends: 837 [2021-12-06 17:44:58,872 INFO L226 Difference]: Without dead ends: 820 [2021-12-06 17:44:58,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1699, Invalid=10073, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 17:44:58,873 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 754 mSDsluCounter, 2423 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 3076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1125 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:58,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 2520 Invalid, 3076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1827 Invalid, 0 Unknown, 1125 Unchecked, 0.6s Time] [2021-12-06 17:44:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-12-06 17:44:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 472. [2021-12-06 17:44:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 468 states have (on average 1.1196581196581197) internal successors, (524), 471 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 524 transitions. [2021-12-06 17:44:58,880 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 524 transitions. Word has length 56 [2021-12-06 17:44:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:58,880 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 524 transitions. [2021-12-06 17:44:58,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 60 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 524 transitions. [2021-12-06 17:44:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 17:44:58,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:58,881 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:58,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 17:44:59,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 17:44:59,082 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:44:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash 374392270, now seen corresponding path program 14 times [2021-12-06 17:44:59,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:59,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355253292] [2021-12-06 17:44:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:59,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:44:59,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:59,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355253292] [2021-12-06 17:44:59,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355253292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:59,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93934192] [2021-12-06 17:44:59,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:44:59,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:59,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:59,416 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:59,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 17:44:59,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:44:59,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:59,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 17:44:59,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:59,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:44:59,835 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 17 treesize of output 13 [2021-12-06 17:44:59,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:45:00,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:45:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:45:00,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:00,137 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1412 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1412) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)) is different from false [2021-12-06 17:45:00,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:00,141 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-06 17:45:00,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:00,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-12-06 17:45:00,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:45:00,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:45:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:45:00,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93934192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:00,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:00,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 51 [2021-12-06 17:45:00,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066141729] [2021-12-06 17:45:00,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:00,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 17:45:00,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:00,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 17:45:00,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2283, Unknown=1, NotChecked=96, Total=2550 [2021-12-06 17:45:00,474 INFO L87 Difference]: Start difference. First operand 472 states and 524 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:01,649 INFO L93 Difference]: Finished difference Result 612 states and 667 transitions. [2021-12-06 17:45:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 17:45:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-06 17:45:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:01,651 INFO L225 Difference]: With dead ends: 612 [2021-12-06 17:45:01,651 INFO L226 Difference]: Without dead ends: 569 [2021-12-06 17:45:01,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=466, Invalid=4507, Unknown=1, NotChecked=138, Total=5112 [2021-12-06 17:45:01,652 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 203 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:01,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1240 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1254 Invalid, 0 Unknown, 164 Unchecked, 0.4s Time] [2021-12-06 17:45:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-12-06 17:45:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 481. [2021-12-06 17:45:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 477 states have (on average 1.1174004192872118) internal successors, (533), 480 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 533 transitions. [2021-12-06 17:45:01,656 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 533 transitions. Word has length 58 [2021-12-06 17:45:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:01,657 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 533 transitions. [2021-12-06 17:45:01,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 533 transitions. [2021-12-06 17:45:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 17:45:01,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:01,657 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:01,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 17:45:01,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-06 17:45:01,859 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:45:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:01,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1250411276, now seen corresponding path program 6 times [2021-12-06 17:45:01,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:01,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572829718] [2021-12-06 17:45:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:01,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 41 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:45:03,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:03,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572829718] [2021-12-06 17:45:03,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572829718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:03,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327663229] [2021-12-06 17:45:03,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:45:03,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:03,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:03,103 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:03,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 17:45:03,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 17:45:03,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:03,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-06 17:45:03,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:03,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:45:03,764 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 17 treesize of output 13 [2021-12-06 17:45:03,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:45:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:45:04,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:05,500 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1463 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1463) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2021-12-06 17:45:05,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:05,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 109 [2021-12-06 17:45:05,594 INFO L354 Elim1Store]: treesize reduction 368, result has 18.0 percent of original size [2021-12-06 17:45:05,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 211 treesize of output 235 [2021-12-06 17:45:05,610 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-06 17:45:05,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 57 [2021-12-06 17:45:07,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:45:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 64 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:07,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327663229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:07,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:07,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 32] total 75 [2021-12-06 17:45:07,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182766219] [2021-12-06 17:45:07,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:07,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 17:45:07,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:07,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 17:45:07,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=4956, Unknown=1, NotChecked=144, Total=5550 [2021-12-06 17:45:07,835 INFO L87 Difference]: Start difference. First operand 481 states and 533 transitions. Second operand has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:36,372 INFO L93 Difference]: Finished difference Result 1295 states and 1396 transitions. [2021-12-06 17:45:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-12-06 17:45:36,373 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-06 17:45:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:36,377 INFO L225 Difference]: With dead ends: 1295 [2021-12-06 17:45:36,377 INFO L226 Difference]: Without dead ends: 1217 [2021-12-06 17:45:36,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 70 SyntacticMatches, 28 SemanticMatches, 206 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14564 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=6037, Invalid=36608, Unknown=1, NotChecked=410, Total=43056 [2021-12-06 17:45:36,379 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1858 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 4699 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1858 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 5906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 4699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:36,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1858 Valid, 2043 Invalid, 5906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 4699 Invalid, 0 Unknown, 450 Unchecked, 2.7s Time] [2021-12-06 17:45:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-12-06 17:45:36,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 587. [2021-12-06 17:45:36,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 583 states have (on average 1.1234991423670668) internal successors, (655), 586 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:36,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 655 transitions. [2021-12-06 17:45:36,387 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 655 transitions. Word has length 58 [2021-12-06 17:45:36,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:36,387 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 655 transitions. [2021-12-06 17:45:36,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:36,387 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 655 transitions. [2021-12-06 17:45:36,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 17:45:36,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:36,388 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:36,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 17:45:36,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:36,589 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:45:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1533222772, now seen corresponding path program 4 times [2021-12-06 17:45:36,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:36,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386389275] [2021-12-06 17:45:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:36,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:36,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386389275] [2021-12-06 17:45:36,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386389275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229142793] [2021-12-06 17:45:36,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:45:36,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:36,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:36,985 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:36,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 17:45:37,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:45:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:37,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 17:45:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:37,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:45:37,430 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 17 treesize of output 13 [2021-12-06 17:45:37,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:45:37,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:37,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 17:45:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:37,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:38,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:38,102 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-06 17:45:38,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:38,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-12-06 17:45:38,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:45:38,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:45:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:38,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229142793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:38,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:38,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 22] total 55 [2021-12-06 17:45:38,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830196756] [2021-12-06 17:45:38,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:38,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 17:45:38,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:38,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 17:45:38,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2664, Unknown=1, NotChecked=0, Total=2970 [2021-12-06 17:45:38,772 INFO L87 Difference]: Start difference. First operand 587 states and 655 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:39,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:39,319 INFO L93 Difference]: Finished difference Result 600 states and 667 transitions. [2021-12-06 17:45:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:45:39,320 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-06 17:45:39,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:39,322 INFO L225 Difference]: With dead ends: 600 [2021-12-06 17:45:39,322 INFO L226 Difference]: Without dead ends: 592 [2021-12-06 17:45:39,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=484, Invalid=3547, Unknown=1, NotChecked=0, Total=4032 [2021-12-06 17:45:39,322 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 125 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:39,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 645 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 602 Invalid, 0 Unknown, 122 Unchecked, 0.3s Time] [2021-12-06 17:45:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-12-06 17:45:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 587. [2021-12-06 17:45:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 583 states have (on average 1.1217838765008576) internal successors, (654), 586 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 654 transitions. [2021-12-06 17:45:39,328 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 654 transitions. Word has length 58 [2021-12-06 17:45:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:39,328 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 654 transitions. [2021-12-06 17:45:39,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 654 transitions. [2021-12-06 17:45:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 17:45:39,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:39,329 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:39,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 17:45:39,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:39,529 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:45:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash -859796103, now seen corresponding path program 4 times [2021-12-06 17:45:39,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:39,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283641971] [2021-12-06 17:45:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:39,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:45:39,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:39,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283641971] [2021-12-06 17:45:39,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283641971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:39,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116114244] [2021-12-06 17:45:39,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:45:39,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:39,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:39,695 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:39,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 17:45:39,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:45:39,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:39,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 17:45:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:39,805 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:45:39,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:45:40,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:45:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:45:40,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:45:40,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:45:40,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:45:40,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:45:40,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-06 17:45:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:40,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:42,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:42,005 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-06 17:45:42,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:42,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 17:45:42,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 17:45:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:42,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116114244] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:42,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:42,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 49 [2021-12-06 17:45:42,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461794679] [2021-12-06 17:45:42,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:42,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 17:45:42,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 17:45:42,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2164, Unknown=1, NotChecked=0, Total=2352 [2021-12-06 17:45:42,812 INFO L87 Difference]: Start difference. First operand 587 states and 654 transitions. Second operand has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:46,095 INFO L93 Difference]: Finished difference Result 840 states and 921 transitions. [2021-12-06 17:45:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 17:45:46,096 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-06 17:45:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:46,098 INFO L225 Difference]: With dead ends: 840 [2021-12-06 17:45:46,098 INFO L226 Difference]: Without dead ends: 768 [2021-12-06 17:45:46,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2905 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1303, Invalid=8998, Unknown=1, NotChecked=0, Total=10302 [2021-12-06 17:45:46,099 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 263 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:46,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 462 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 592 Invalid, 0 Unknown, 396 Unchecked, 0.2s Time] [2021-12-06 17:45:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-12-06 17:45:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 637. [2021-12-06 17:45:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 633 states have (on average 1.1184834123222749) internal successors, (708), 636 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 708 transitions. [2021-12-06 17:45:46,105 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 708 transitions. Word has length 59 [2021-12-06 17:45:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:46,105 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 708 transitions. [2021-12-06 17:45:46,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 708 transitions. [2021-12-06 17:45:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 17:45:46,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:46,106 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:46,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 17:45:46,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-06 17:45:46,307 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:45:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash -469355232, now seen corresponding path program 2 times [2021-12-06 17:45:46,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:46,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906641414] [2021-12-06 17:45:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:46,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:45:46,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:46,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906641414] [2021-12-06 17:45:46,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906641414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:46,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329398348] [2021-12-06 17:45:46,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:45:46,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:46,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:46,472 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:46,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 17:45:46,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:45:46,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 17:45:46,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:46,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:45:46,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:45:46,746 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 14 treesize of output 10 [2021-12-06 17:45:47,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:45:47,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:45:47,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:47,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 17:45:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 17:45:47,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:47,758 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1640 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| Int)) (or (<= (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 4) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1640) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) 0) (< |c_ULTIMATE.start_cstrncat_~s~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|) (< |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 0))) is different from false [2021-12-06 17:45:47,800 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1640 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| Int)) (or (<= (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 4) (select |c_#length| |c_ULTIMATE.start_cstrncat_~src#1.base|)) (< |c_ULTIMATE.start_cstrncat_~src#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_1640) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 2 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) 0) (< |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 0))) is different from false [2021-12-06 17:45:47,811 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1640 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| Int)) (or (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1640) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) 0) (< |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 0))) is different from false [2021-12-06 17:45:47,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:47,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:45:47,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:47,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 17:45:47,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:45:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 3 not checked. [2021-12-06 17:45:48,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329398348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:48,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:48,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2021-12-06 17:45:48,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039913783] [2021-12-06 17:45:48,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:48,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:45:48,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:45:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1657, Unknown=3, NotChecked=252, Total=2070 [2021-12-06 17:45:48,442 INFO L87 Difference]: Start difference. First operand 637 states and 708 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:49,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:49,952 INFO L93 Difference]: Finished difference Result 847 states and 921 transitions. [2021-12-06 17:45:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 17:45:49,953 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 17:45:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:49,955 INFO L225 Difference]: With dead ends: 847 [2021-12-06 17:45:49,955 INFO L226 Difference]: Without dead ends: 803 [2021-12-06 17:45:49,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=773, Invalid=6718, Unknown=3, NotChecked=516, Total=8010 [2021-12-06 17:45:49,956 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 215 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 580 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:49,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 468 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 408 Invalid, 0 Unknown, 580 Unchecked, 0.2s Time] [2021-12-06 17:45:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-12-06 17:45:49,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 627. [2021-12-06 17:45:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 623 states have (on average 1.1123595505617978) internal successors, (693), 626 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 693 transitions. [2021-12-06 17:45:49,962 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 693 transitions. Word has length 61 [2021-12-06 17:45:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:49,962 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 693 transitions. [2021-12-06 17:45:49,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 693 transitions. [2021-12-06 17:45:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:45:49,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:49,963 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:49,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 17:45:50,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-06 17:45:50,165 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:45:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:50,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1729983568, now seen corresponding path program 5 times [2021-12-06 17:45:50,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:50,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787940222] [2021-12-06 17:45:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:50,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:51,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:51,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787940222] [2021-12-06 17:45:51,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787940222] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:51,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402208139] [2021-12-06 17:45:51,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:45:51,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:51,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:51,029 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:51,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 17:45:51,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 17:45:51,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 17:45:51,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:51,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:45:51,589 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 17 treesize of output 13 [2021-12-06 17:45:51,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:45:52,494 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-12-06 17:45:52,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 27 [2021-12-06 17:45:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 68 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:52,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:53,139 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1699 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1699) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)))) (= (mod (+ 4294967295 |c_ULTIMATE.start_main_~n~0#1|) 4294967296) 0)) is different from false [2021-12-06 17:45:53,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:53,147 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2021-12-06 17:45:53,160 INFO L354 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2021-12-06 17:45:53,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 63 [2021-12-06 17:45:53,165 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 17:45:53,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2021-12-06 17:45:54,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:45:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:54,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402208139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:54,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:54,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 24] total 71 [2021-12-06 17:45:54,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023261734] [2021-12-06 17:45:54,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:54,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 17:45:54,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 17:45:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=4503, Unknown=2, NotChecked=136, Total=4970 [2021-12-06 17:45:54,258 INFO L87 Difference]: Start difference. First operand 627 states and 693 transitions. Second operand has 71 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:58,282 INFO L93 Difference]: Finished difference Result 759 states and 830 transitions. [2021-12-06 17:45:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 17:45:58,282 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 17:45:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:58,285 INFO L225 Difference]: With dead ends: 759 [2021-12-06 17:45:58,285 INFO L226 Difference]: Without dead ends: 751 [2021-12-06 17:45:58,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1186, Invalid=11472, Unknown=2, NotChecked=222, Total=12882 [2021-12-06 17:45:58,286 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 430 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:58,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 1014 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1311 Invalid, 0 Unknown, 280 Unchecked, 0.7s Time] [2021-12-06 17:45:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-12-06 17:45:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 629. [2021-12-06 17:45:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 625 states have (on average 1.112) internal successors, (695), 628 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 695 transitions. [2021-12-06 17:45:58,291 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 695 transitions. Word has length 64 [2021-12-06 17:45:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:58,291 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 695 transitions. [2021-12-06 17:45:58,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 695 transitions. [2021-12-06 17:45:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:45:58,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:58,292 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:58,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 17:45:58,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 17:45:58,494 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:45:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash -619774124, now seen corresponding path program 15 times [2021-12-06 17:45:58,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:58,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329964271] [2021-12-06 17:45:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:58,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 98 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:58,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:58,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329964271] [2021-12-06 17:45:58,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329964271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:58,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872747628] [2021-12-06 17:45:58,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:45:58,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:58,717 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:58,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 17:45:58,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 17:45:58,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 17:45:58,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:58,873 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:45:58,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:45:58,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:45:59,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 17:45:59,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 17:45:59,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:59,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 17:45:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 28 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-06 17:45:59,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:59,749 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_~d~0#1.offset| Int) (v_ArrVal_1759 (Array Int Int))) (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (< .cse0 (+ 6 |ULTIMATE.start_cstrncat_~d~0#1.offset|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1759) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |ULTIMATE.start_cstrncat_~d~0#1.offset|)) 0) (< (+ 5 |ULTIMATE.start_cstrncat_~d~0#1.offset|) 0) (<= (+ 7 |ULTIMATE.start_cstrncat_~d~0#1.offset|) .cse0)))) is different from false [2021-12-06 17:45:59,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:59,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-06 17:45:59,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:45:59,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-12-06 17:45:59,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:46:00,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:46:00,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:46:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 17:46:00,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872747628] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:00,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:00,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 21] total 52 [2021-12-06 17:46:00,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782498472] [2021-12-06 17:46:00,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:00,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 17:46:00,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:00,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 17:46:00,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2382, Unknown=1, NotChecked=100, Total=2756 [2021-12-06 17:46:00,566 INFO L87 Difference]: Start difference. First operand 629 states and 695 transitions. Second operand has 53 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:04,531 INFO L93 Difference]: Finished difference Result 1423 states and 1527 transitions. [2021-12-06 17:46:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-06 17:46:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 17:46:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:04,535 INFO L225 Difference]: With dead ends: 1423 [2021-12-06 17:46:04,535 INFO L226 Difference]: Without dead ends: 1244 [2021-12-06 17:46:04,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3117 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2666, Invalid=12099, Unknown=1, NotChecked=240, Total=15006 [2021-12-06 17:46:04,536 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 852 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:04,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 1762 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2354 Invalid, 0 Unknown, 225 Unchecked, 1.0s Time] [2021-12-06 17:46:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-12-06 17:46:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 615. [2021-12-06 17:46:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 611 states have (on average 1.1080196399345335) internal successors, (677), 614 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 677 transitions. [2021-12-06 17:46:04,544 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 677 transitions. Word has length 66 [2021-12-06 17:46:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:04,544 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 677 transitions. [2021-12-06 17:46:04,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 677 transitions. [2021-12-06 17:46:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:46:04,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:04,545 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:04,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-06 17:46:04,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 17:46:04,747 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:46:04,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1343128779, now seen corresponding path program 7 times [2021-12-06 17:46:04,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:04,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171806103] [2021-12-06 17:46:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:04,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:05,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171806103] [2021-12-06 17:46:05,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171806103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062750187] [2021-12-06 17:46:05,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:46:05,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:05,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:05,006 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:05,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 17:46:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 17:46:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:46:05,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:46:05,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:46:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:05,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 153 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:06,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062750187] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:06,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:06,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 65 [2021-12-06 17:46:06,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542156497] [2021-12-06 17:46:06,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:06,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 17:46:06,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 17:46:06,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=3824, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 17:46:06,531 INFO L87 Difference]: Start difference. First operand 615 states and 677 transitions. Second operand has 66 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 66 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:08,111 INFO L93 Difference]: Finished difference Result 1293 states and 1390 transitions. [2021-12-06 17:46:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 17:46:08,111 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 66 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 17:46:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:08,115 INFO L225 Difference]: With dead ends: 1293 [2021-12-06 17:46:08,115 INFO L226 Difference]: Without dead ends: 1277 [2021-12-06 17:46:08,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1611, Invalid=7131, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 17:46:08,116 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 878 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:08,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1791 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:46:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-12-06 17:46:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 649. [2021-12-06 17:46:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 645 states have (on average 1.1054263565891473) internal successors, (713), 648 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 713 transitions. [2021-12-06 17:46:08,124 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 713 transitions. Word has length 68 [2021-12-06 17:46:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:08,124 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 713 transitions. [2021-12-06 17:46:08,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 66 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 713 transitions. [2021-12-06 17:46:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:46:08,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:08,125 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:08,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-06 17:46:08,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:08,326 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:46:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:08,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1815735573, now seen corresponding path program 1 times [2021-12-06 17:46:08,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:08,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372592991] [2021-12-06 17:46:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:08,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 66 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:08,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:08,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372592991] [2021-12-06 17:46:08,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372592991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:08,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294279578] [2021-12-06 17:46:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:08,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:08,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:08,604 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:08,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 17:46:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:08,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 17:46:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:08,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:46:08,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:46:08,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:46:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 91 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:09,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:09,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294279578] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:09,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:09,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2021-12-06 17:46:09,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932190800] [2021-12-06 17:46:09,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:09,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 17:46:09,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 17:46:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=3222, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 17:46:09,766 INFO L87 Difference]: Start difference. First operand 649 states and 713 transitions. Second operand has 61 states, 60 states have (on average 3.2333333333333334) internal successors, (194), 61 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:10,683 INFO L93 Difference]: Finished difference Result 1257 states and 1345 transitions. [2021-12-06 17:46:10,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 17:46:10,683 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.2333333333333334) internal successors, (194), 61 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 17:46:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:10,687 INFO L225 Difference]: With dead ends: 1257 [2021-12-06 17:46:10,687 INFO L226 Difference]: Without dead ends: 1201 [2021-12-06 17:46:10,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1095, Invalid=4911, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 17:46:10,688 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 752 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:10,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 1309 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:46:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-12-06 17:46:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 595. [2021-12-06 17:46:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 591 states have (on average 1.101522842639594) internal successors, (651), 594 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 651 transitions. [2021-12-06 17:46:10,695 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 651 transitions. Word has length 68 [2021-12-06 17:46:10,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:10,696 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 651 transitions. [2021-12-06 17:46:10,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.2333333333333334) internal successors, (194), 61 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 651 transitions. [2021-12-06 17:46:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:46:10,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:10,696 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:10,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 17:46:10,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 17:46:10,898 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:46:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2119424490, now seen corresponding path program 6 times [2021-12-06 17:46:10,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:10,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140215665] [2021-12-06 17:46:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:10,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:46:11,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:11,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140215665] [2021-12-06 17:46:11,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140215665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:11,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795786297] [2021-12-06 17:46:11,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:46:11,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:11,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:11,194 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:11,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 17:46:11,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 17:46:11,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:46:11,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 17:46:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:11,359 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:46:11,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:46:11,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:46:11,804 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:46:11,804 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 16 treesize of output 22 [2021-12-06 17:46:11,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 17:46:12,024 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:46:12,024 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 20 treesize of output 26 [2021-12-06 17:46:12,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:46:12,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-12-06 17:46:12,226 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:46:12,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 17:46:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 17:46:12,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:13,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:46:13,220 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-06 17:46:13,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:46:13,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 17:46:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 17:46:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 20 refuted. 7 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 17:46:13,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795786297] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:13,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:13,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 60 [2021-12-06 17:46:13,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142266725] [2021-12-06 17:46:13,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:13,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 17:46:13,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:13,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 17:46:13,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3265, Unknown=45, NotChecked=0, Total=3540 [2021-12-06 17:46:13,847 INFO L87 Difference]: Start difference. First operand 595 states and 651 transitions. Second operand has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 60 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:15,136 INFO L93 Difference]: Finished difference Result 804 states and 874 transitions. [2021-12-06 17:46:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 17:46:15,136 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 60 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 17:46:15,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:15,138 INFO L225 Difference]: With dead ends: 804 [2021-12-06 17:46:15,138 INFO L226 Difference]: Without dead ends: 664 [2021-12-06 17:46:15,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=665, Invalid=7480, Unknown=45, NotChecked=0, Total=8190 [2021-12-06 17:46:15,139 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 128 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:15,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 565 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 493 Invalid, 0 Unknown, 251 Unchecked, 0.2s Time] [2021-12-06 17:46:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-06 17:46:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 633. [2021-12-06 17:46:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 629 states have (on average 1.1017488076311606) internal successors, (693), 632 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:15,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 693 transitions. [2021-12-06 17:46:15,148 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 693 transitions. Word has length 68 [2021-12-06 17:46:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:15,148 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 693 transitions. [2021-12-06 17:46:15,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 60 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:15,149 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 693 transitions. [2021-12-06 17:46:15,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 17:46:15,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:15,150 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:15,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 17:46:15,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 17:46:15,350 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:46:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:15,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2038398780, now seen corresponding path program 8 times [2021-12-06 17:46:15,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:15,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093507423] [2021-12-06 17:46:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:15,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 69 proven. 183 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:46:16,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:16,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093507423] [2021-12-06 17:46:16,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093507423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:16,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116844938] [2021-12-06 17:46:16,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:46:16,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:16,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:16,503 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:16,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 17:46:16,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:46:16,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:46:16,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 17:46:16,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:17,320 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 17 treesize of output 13 [2021-12-06 17:46:17,386 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-12-06 17:46:17,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:46:19,168 INFO L354 Elim1Store]: treesize reduction 87, result has 39.2 percent of original size [2021-12-06 17:46:19,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 36 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 91 treesize of output 97 [2021-12-06 17:46:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:46:19,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:21,523 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)))) is different from false [2021-12-06 17:46:21,546 INFO L354 Elim1Store]: treesize reduction 416, result has 0.2 percent of original size [2021-12-06 17:46:21,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 540 treesize of output 488 [2021-12-06 17:46:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 99 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:46:23,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116844938] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:23,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:23,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 36] total 87 [2021-12-06 17:46:23,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229679530] [2021-12-06 17:46:23,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:23,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-06 17:46:23,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:23,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-06 17:46:23,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=6679, Unknown=1, NotChecked=168, Total=7482 [2021-12-06 17:46:23,270 INFO L87 Difference]: Start difference. First operand 633 states and 693 transitions. Second operand has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:26,278 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (< 10 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse4 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) (.cse2 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (.cse5 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 6 |c_ULTIMATE.start_main_~n~0#1|))) (.cse6 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4))) (.cse7 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 7 |c_ULTIMATE.start_main_~n~0#1|))) (.cse8 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 5 |c_ULTIMATE.start_main_~n~0#1|))) (.cse13 (+ 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse10 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 8))) (.cse9 (+ |c_ULTIMATE.start_main_~n~0#1| 1)) (.cse11 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 9 |c_ULTIMATE.start_main_~n~0#1|))) (.cse12 (= (+ 3 |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|))) (and (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 1) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) (or .cse1 .cse2) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse3 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)))) (or .cse1 .cse4) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 6) .cse4 .cse2 (or .cse5 .cse6 .cse7 .cse8 (= |c_ULTIMATE.start_main_~length1~0#1| .cse9) .cse10 .cse11 .cse12 (= |c_ULTIMATE.start_main_~length1~0#1| .cse13)) (<= 6 |c_ULTIMATE.start_main_~i~0#1|) (or .cse5 .cse6 .cse7 .cse8 (= .cse13 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|)) .cse10 (<= |c_ULTIMATE.start_main_~length1~0#1| .cse9) .cse11 .cse12))) is different from false [2021-12-06 17:46:28,296 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse9 (+ |c_ULTIMATE.start_main_~n~0#1| 1)) (.cse13 (+ 2 |c_ULTIMATE.start_main_~n~0#1|))) (let ((.cse1 (< 10 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse4 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) (.cse2 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (.cse5 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 6 |c_ULTIMATE.start_main_~n~0#1|))) (.cse6 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4))) (.cse7 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 7 |c_ULTIMATE.start_main_~n~0#1|))) (.cse8 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 5 |c_ULTIMATE.start_main_~n~0#1|))) (.cse15 (= .cse13 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|))) (.cse10 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 8))) (.cse16 (<= |c_ULTIMATE.start_main_~length1~0#1| .cse9)) (.cse11 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 9 |c_ULTIMATE.start_main_~n~0#1|))) (.cse12 (= (+ 3 |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|))) (and (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 1) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) (or .cse1 .cse2) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse3 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)))) (or .cse1 .cse4) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse4 .cse2 (or .cse5 .cse6 .cse7 .cse8 (= |c_ULTIMATE.start_main_~length1~0#1| .cse9) .cse10 .cse11 .cse12 (= |c_ULTIMATE.start_main_~length1~0#1| .cse13)) (<= |c_ULTIMATE.start_main_~i~0#1| 5) (or (let ((.cse14 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1| 1))) (and (or (not (= |c_ULTIMATE.start_main_~length1~0#1| .cse14)) (and (<= |c_ULTIMATE.start_main_~i~0#1| 8) (<= 8 |c_ULTIMATE.start_main_~i~0#1|))) (or .cse5 .cse6 .cse15 .cse10 .cse16 .cse12 (<= .cse14 |c_ULTIMATE.start_main_~length1~0#1|)))) .cse7 .cse8) (or .cse2 (< |c_ULTIMATE.start_main_~length1~0#1| (+ 2 |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (or .cse5 .cse6 .cse7 .cse8 .cse15 .cse10 .cse16 .cse11 .cse12)))) is different from false [2021-12-06 17:46:30,213 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 1) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) (<= (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~length1~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (and (<= (+ |c_ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~length1~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~length1~0#1| (* |ULTIMATE.start_main_~n~0#1| (- 1)))) 0) (<= |ULTIMATE.start_main_~length1~0#1| 10) (<= 1 |ULTIMATE.start_main_~n~0#1|))) (= |c_ULTIMATE.start_main_~length2~0#1| 1) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse1 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)))) (<= |c_ULTIMATE.start_main_~length1~0#1| 10) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~n~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 9) (or (= |c_ULTIMATE.start_main_~length1~0#1| (+ 6 |c_ULTIMATE.start_main_~n~0#1|)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ 7 |c_ULTIMATE.start_main_~n~0#1|)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ 5 |c_ULTIMATE.start_main_~n~0#1|)) (= (+ 2 |c_ULTIMATE.start_main_~n~0#1|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 8)) (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 1)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ 9 |c_ULTIMATE.start_main_~n~0#1|)) (= (+ 3 |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|))) is different from false [2021-12-06 17:46:32,224 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (< 10 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse4 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) (.cse2 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (.cse5 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 6 |c_ULTIMATE.start_main_~n~0#1|))) (.cse6 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4))) (.cse7 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 7 |c_ULTIMATE.start_main_~n~0#1|))) (.cse8 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 5 |c_ULTIMATE.start_main_~n~0#1|))) (.cse13 (+ 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse10 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 8))) (.cse9 (+ |c_ULTIMATE.start_main_~n~0#1| 1)) (.cse11 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 9 |c_ULTIMATE.start_main_~n~0#1|))) (.cse12 (= (+ 3 |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|))) (and (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 1) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) (or .cse1 .cse2) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse3 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)))) (or .cse1 .cse4) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse4 .cse2 (or .cse5 .cse6 .cse7 .cse8 (= |c_ULTIMATE.start_main_~length1~0#1| .cse9) .cse10 .cse11 .cse12 (= |c_ULTIMATE.start_main_~length1~0#1| .cse13)) (or .cse5 .cse6 .cse7 .cse8 (= .cse13 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|)) .cse10 (<= |c_ULTIMATE.start_main_~length1~0#1| .cse9) .cse11 .cse12))) is different from false [2021-12-06 17:46:34,240 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse9 (+ |c_ULTIMATE.start_main_~n~0#1| 1)) (.cse13 (+ 2 |c_ULTIMATE.start_main_~n~0#1|))) (let ((.cse1 (< 10 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse4 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) (.cse2 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (.cse5 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 6 |c_ULTIMATE.start_main_~n~0#1|))) (.cse6 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4))) (.cse7 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 7 |c_ULTIMATE.start_main_~n~0#1|))) (.cse8 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 5 |c_ULTIMATE.start_main_~n~0#1|))) (.cse15 (= .cse13 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|))) (.cse10 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 8))) (.cse16 (<= |c_ULTIMATE.start_main_~length1~0#1| .cse9)) (.cse11 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 9 |c_ULTIMATE.start_main_~n~0#1|))) (.cse12 (= (+ 3 |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|))) (and (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 1) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) (or .cse1 .cse2) (<= 7 |c_ULTIMATE.start_main_~i~0#1|) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse3 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)))) (or .cse1 .cse4) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse4 .cse2 (or .cse5 .cse6 .cse7 .cse8 (= |c_ULTIMATE.start_main_~length1~0#1| .cse9) .cse10 .cse11 .cse12 (= |c_ULTIMATE.start_main_~length1~0#1| .cse13)) (<= |c_ULTIMATE.start_main_~i~0#1| 7) (or (let ((.cse14 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1| 1))) (and (or (not (= |c_ULTIMATE.start_main_~length1~0#1| .cse14)) (and (<= |c_ULTIMATE.start_main_~i~0#1| 8) (<= 8 |c_ULTIMATE.start_main_~i~0#1|))) (or .cse5 .cse6 .cse15 .cse10 .cse16 .cse12 (<= .cse14 |c_ULTIMATE.start_main_~length1~0#1|)))) .cse7 .cse8) (or .cse2 (< |c_ULTIMATE.start_main_~length1~0#1| (+ 2 |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (or .cse5 .cse6 .cse7 .cse8 .cse15 .cse10 .cse16 .cse11 .cse12)))) is different from false [2021-12-06 17:46:36,453 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse9 (+ |c_ULTIMATE.start_main_~n~0#1| 1)) (.cse13 (+ 2 |c_ULTIMATE.start_main_~n~0#1|))) (let ((.cse1 (< 10 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse4 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) (.cse2 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (.cse5 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 6 |c_ULTIMATE.start_main_~n~0#1|))) (.cse6 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4))) (.cse7 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 7 |c_ULTIMATE.start_main_~n~0#1|))) (.cse8 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 5 |c_ULTIMATE.start_main_~n~0#1|))) (.cse15 (= .cse13 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|))) (.cse10 (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 8))) (.cse16 (<= |c_ULTIMATE.start_main_~length1~0#1| .cse9)) (.cse11 (= |c_ULTIMATE.start_main_~length1~0#1| (+ 9 |c_ULTIMATE.start_main_~n~0#1|))) (.cse12 (= (+ 3 |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|))) (and (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 1) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) (or .cse1 .cse2) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse3 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)))) (or .cse1 .cse4) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse4 .cse2 (or .cse5 .cse6 .cse7 .cse8 (= |c_ULTIMATE.start_main_~length1~0#1| .cse9) .cse10 .cse11 .cse12 (= |c_ULTIMATE.start_main_~length1~0#1| .cse13)) (or (let ((.cse14 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1| 1))) (and (or (not (= |c_ULTIMATE.start_main_~length1~0#1| .cse14)) (and (<= |c_ULTIMATE.start_main_~i~0#1| 8) (<= 8 |c_ULTIMATE.start_main_~i~0#1|))) (or .cse5 .cse6 .cse15 .cse10 .cse16 .cse12 (<= .cse14 |c_ULTIMATE.start_main_~length1~0#1|)))) .cse7 .cse8) (or .cse2 (< |c_ULTIMATE.start_main_~length1~0#1| (+ 2 |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (or .cse5 .cse6 .cse7 .cse8 .cse15 .cse10 .cse16 .cse11 .cse12)))) is different from false [2021-12-06 17:46:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:39,570 INFO L93 Difference]: Finished difference Result 1087 states and 1178 transitions. [2021-12-06 17:46:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-06 17:46:39,571 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 17:46:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:39,574 INFO L225 Difference]: With dead ends: 1087 [2021-12-06 17:46:39,574 INFO L226 Difference]: Without dead ends: 1019 [2021-12-06 17:46:39,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 8556 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=1934, Invalid=22266, Unknown=8, NotChecked=2198, Total=26406 [2021-12-06 17:46:39,575 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 681 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:39,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 1099 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1663 Invalid, 0 Unknown, 763 Unchecked, 0.9s Time] [2021-12-06 17:46:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-12-06 17:46:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 667. [2021-12-06 17:46:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 663 states have (on average 1.1025641025641026) internal successors, (731), 666 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 731 transitions. [2021-12-06 17:46:39,582 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 731 transitions. Word has length 70 [2021-12-06 17:46:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:39,582 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 731 transitions. [2021-12-06 17:46:39,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 731 transitions. [2021-12-06 17:46:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 17:46:39,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:39,583 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:39,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 17:46:39,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:39,785 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:46:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:39,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1793850028, now seen corresponding path program 7 times [2021-12-06 17:46:39,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:39,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378730546] [2021-12-06 17:46:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:39,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:40,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:40,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378730546] [2021-12-06 17:46:40,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378730546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:40,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661422874] [2021-12-06 17:46:40,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:46:40,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:40,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:40,968 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:40,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 17:46:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:41,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 17:46:41,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:41,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:46:41,581 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 17 treesize of output 13 [2021-12-06 17:46:41,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:46:44,178 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-12-06 17:46:44,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 37 [2021-12-06 17:46:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 96 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:44,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:44,923 WARN L838 $PredicateComparison]: unable to prove that (or (= (mod (+ 4294967295 |c_ULTIMATE.start_main_~n~0#1|) 4294967296) 0) (forall ((v_ArrVal_2059 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2059) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0))))) is different from false [2021-12-06 17:46:44,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:46:44,931 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 51 [2021-12-06 17:46:44,948 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-12-06 17:46:44,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 92 [2021-12-06 17:46:44,954 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-06 17:46:44,954 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 34 treesize of output 22 [2021-12-06 17:46:46,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:46:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 28 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:46,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661422874] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:46,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:46,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 77 [2021-12-06 17:46:46,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191614108] [2021-12-06 17:46:46,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:46,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 17:46:46,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 17:46:46,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=5275, Unknown=6, NotChecked=148, Total=5852 [2021-12-06 17:46:46,474 INFO L87 Difference]: Start difference. First operand 667 states and 731 transitions. Second operand has 77 states, 77 states have (on average 2.3506493506493507) internal successors, (181), 77 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:49,568 INFO L93 Difference]: Finished difference Result 711 states and 778 transitions. [2021-12-06 17:46:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 17:46:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.3506493506493507) internal successors, (181), 77 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 17:46:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:49,571 INFO L225 Difference]: With dead ends: 711 [2021-12-06 17:46:49,571 INFO L226 Difference]: Without dead ends: 681 [2021-12-06 17:46:49,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3196 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1298, Invalid=11132, Unknown=6, NotChecked=220, Total=12656 [2021-12-06 17:46:49,571 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 350 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:49,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 762 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 918 Invalid, 0 Unknown, 155 Unchecked, 0.5s Time] [2021-12-06 17:46:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-12-06 17:46:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 671. [2021-12-06 17:46:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 667 states have (on average 1.106446776611694) internal successors, (738), 670 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 738 transitions. [2021-12-06 17:46:49,577 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 738 transitions. Word has length 70 [2021-12-06 17:46:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 738 transitions. [2021-12-06 17:46:49,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.3506493506493507) internal successors, (181), 77 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 738 transitions. [2021-12-06 17:46:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:46:49,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:49,578 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:49,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 17:46:49,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:49,779 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:46:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:49,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1319370477, now seen corresponding path program 8 times [2021-12-06 17:46:49,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:49,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233316373] [2021-12-06 17:46:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:49,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:46:49,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233316373] [2021-12-06 17:46:49,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233316373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:49,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360606168] [2021-12-06 17:46:49,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:46:49,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:49,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:49,924 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:49,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 17:46:50,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:46:50,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:46:50,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 17:46:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 11 proven. 67 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:46:50,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:46:50,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360606168] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:50,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:50,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 19] total 50 [2021-12-06 17:46:50,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731517985] [2021-12-06 17:46:50,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:50,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 17:46:50,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:50,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 17:46:50,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2073, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 17:46:50,947 INFO L87 Difference]: Start difference. First operand 671 states and 738 transitions. Second operand has 50 states, 50 states have (on average 3.56) internal successors, (178), 50 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:51,580 INFO L93 Difference]: Finished difference Result 698 states and 760 transitions. [2021-12-06 17:46:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:46:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.56) internal successors, (178), 50 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-06 17:46:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:51,583 INFO L225 Difference]: With dead ends: 698 [2021-12-06 17:46:51,583 INFO L226 Difference]: Without dead ends: 624 [2021-12-06 17:46:51,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=987, Invalid=4269, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 17:46:51,583 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 350 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:51,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 448 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:46:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-12-06 17:46:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 623. [2021-12-06 17:46:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 619 states have (on average 1.1066235864297254) internal successors, (685), 622 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 685 transitions. [2021-12-06 17:46:51,589 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 685 transitions. Word has length 72 [2021-12-06 17:46:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:51,589 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 685 transitions. [2021-12-06 17:46:51,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.56) internal successors, (178), 50 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 685 transitions. [2021-12-06 17:46:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 17:46:51,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:51,590 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:51,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 17:46:51,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:51,791 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:46:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:51,792 INFO L85 PathProgramCache]: Analyzing trace with hash -127967545, now seen corresponding path program 9 times [2021-12-06 17:46:51,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:51,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179930494] [2021-12-06 17:46:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:51,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 120 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:52,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:52,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179930494] [2021-12-06 17:46:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179930494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:52,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495997736] [2021-12-06 17:46:52,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:46:52,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:52,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:52,095 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:52,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 17:46:52,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 17:46:52,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:46:52,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 17:46:52,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:52,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:46:52,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:46:52,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:46:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 153 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:52,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 190 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:53,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495997736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:53,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:53,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 72 [2021-12-06 17:46:53,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355913681] [2021-12-06 17:46:53,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:53,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 17:46:53,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:53,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 17:46:53,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=4602, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 17:46:53,754 INFO L87 Difference]: Start difference. First operand 623 states and 685 transitions. Second operand has 73 states, 72 states have (on average 2.9444444444444446) internal successors, (212), 73 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:55,303 INFO L93 Difference]: Finished difference Result 1537 states and 1649 transitions. [2021-12-06 17:46:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 17:46:55,303 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.9444444444444446) internal successors, (212), 73 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-06 17:46:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:55,308 INFO L225 Difference]: With dead ends: 1537 [2021-12-06 17:46:55,308 INFO L226 Difference]: Without dead ends: 1515 [2021-12-06 17:46:55,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2060, Invalid=8446, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 17:46:55,309 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1076 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:55,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 1287 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:46:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-12-06 17:46:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 659. [2021-12-06 17:46:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 655 states have (on average 1.1038167938931298) internal successors, (723), 658 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 723 transitions. [2021-12-06 17:46:55,319 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 723 transitions. Word has length 74 [2021-12-06 17:46:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:55,319 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 723 transitions. [2021-12-06 17:46:55,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.9444444444444446) internal successors, (212), 73 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 723 transitions. [2021-12-06 17:46:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 17:46:55,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:55,320 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:55,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 17:46:55,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:55,520 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:46:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1577241536, now seen corresponding path program 10 times [2021-12-06 17:46:55,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:55,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288371728] [2021-12-06 17:46:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:55,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 86 proven. 224 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:46:57,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:57,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288371728] [2021-12-06 17:46:57,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288371728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:57,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057944175] [2021-12-06 17:46:57,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:46:57,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:57,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:57,417 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:57,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 17:46:57,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:46:57,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:46:57,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-06 17:46:57,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:57,656 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:46:57,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:46:58,437 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 17 treesize of output 13 [2021-12-06 17:46:58,521 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:46:58,521 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 20 treesize of output 26 [2021-12-06 17:46:58,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-12-06 17:47:02,046 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:47:02,046 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 13 treesize of output 13 [2021-12-06 17:47:37,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:47:37,769 INFO L354 Elim1Store]: treesize reduction 101, result has 36.5 percent of original size [2021-12-06 17:47:37,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 100 [2021-12-06 17:47:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 44 proven. 233 refuted. 33 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:47:37,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:47:38,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:47:38,968 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 133 [2021-12-06 17:47:38,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:38,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:47:39,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 351 [2021-12-06 17:47:39,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:47:39,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 71 [2021-12-06 17:47:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 120 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:47:43,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057944175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:47:43,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:47:43,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 97 [2021-12-06 17:47:43,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6712034] [2021-12-06 17:47:43,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:47:43,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 17:47:43,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:47:43,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 17:47:43,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=8546, Unknown=42, NotChecked=0, Total=9312 [2021-12-06 17:47:43,956 INFO L87 Difference]: Start difference. First operand 659 states and 723 transitions. Second operand has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:47,268 WARN L227 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 87 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:49:05,200 WARN L227 SmtUtils]: Spent 7.98s on a formula simplification. DAG size of input: 99 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:49:28,047 WARN L227 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 104 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:49:57,539 WARN L227 SmtUtils]: Spent 12.82s on a formula simplification. DAG size of input: 116 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:50:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:12,834 INFO L93 Difference]: Finished difference Result 1496 states and 1619 transitions. [2021-12-06 17:50:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-06 17:50:12,834 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-06 17:50:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:12,839 INFO L225 Difference]: With dead ends: 1496 [2021-12-06 17:50:12,839 INFO L226 Difference]: Without dead ends: 1422 [2021-12-06 17:50:12,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13147 ImplicationChecksByTransitivity, 189.1s TimeCoverageRelationStatistics Valid=4036, Invalid=40629, Unknown=67, NotChecked=0, Total=44732 [2021-12-06 17:50:12,841 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 1342 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 3854 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 5680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 3854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1526 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:12,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 2031 Invalid, 5680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 3854 Invalid, 0 Unknown, 1526 Unchecked, 2.7s Time] [2021-12-06 17:50:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-12-06 17:50:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 693. [2021-12-06 17:50:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 689 states have (on average 1.104499274310595) internal successors, (761), 692 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 761 transitions. [2021-12-06 17:50:12,849 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 761 transitions. Word has length 76 [2021-12-06 17:50:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:12,849 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 761 transitions. [2021-12-06 17:50:12,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 761 transitions. [2021-12-06 17:50:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 17:50:12,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:12,850 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:12,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 17:50:13,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:13,051 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:50:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:13,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1515809896, now seen corresponding path program 9 times [2021-12-06 17:50:13,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:13,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349642658] [2021-12-06 17:50:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:13,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:13,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349642658] [2021-12-06 17:50:13,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349642658] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735150759] [2021-12-06 17:50:13,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:50:13,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:13,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:13,893 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:13,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 17:50:14,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 17:50:14,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:14,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 17:50:14,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:14,172 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:50:14,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:50:14,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:50:14,751 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 18 treesize of output 14 [2021-12-06 17:50:14,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-06 17:50:14,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:50:14,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 17:50:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 17:50:15,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:16,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:50:16,382 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-06 17:50:16,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:50:16,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-12-06 17:50:16,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 17:50:17,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:50:17,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:50:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 17:50:17,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735150759] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:17,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:17,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 23] total 71 [2021-12-06 17:50:17,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80330654] [2021-12-06 17:50:17,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:17,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 17:50:17,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 17:50:17,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=4663, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 17:50:17,916 INFO L87 Difference]: Start difference. First operand 693 states and 761 transitions. Second operand has 71 states, 71 states have (on average 2.408450704225352) internal successors, (171), 71 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:32,880 WARN L227 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 58 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:50:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:56,376 INFO L93 Difference]: Finished difference Result 1204 states and 1287 transitions. [2021-12-06 17:50:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-12-06 17:50:56,376 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.408450704225352) internal successors, (171), 71 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-06 17:50:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:56,380 INFO L225 Difference]: With dead ends: 1204 [2021-12-06 17:50:56,380 INFO L226 Difference]: Without dead ends: 1194 [2021-12-06 17:50:56,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15350 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=8264, Invalid=47668, Unknown=0, NotChecked=0, Total=55932 [2021-12-06 17:50:56,383 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 971 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 4431 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 5796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 4431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 625 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:56,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 1110 Invalid, 5796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 4431 Invalid, 0 Unknown, 625 Unchecked, 2.8s Time] [2021-12-06 17:50:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-12-06 17:50:56,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 750. [2021-12-06 17:50:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 746 states have (on average 1.1072386058981234) internal successors, (826), 749 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 826 transitions. [2021-12-06 17:50:56,394 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 826 transitions. Word has length 76 [2021-12-06 17:50:56,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:56,394 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 826 transitions. [2021-12-06 17:50:56,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.408450704225352) internal successors, (171), 71 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 826 transitions. [2021-12-06 17:50:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 17:50:56,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:56,395 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:56,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 17:50:56,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:56,596 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:50:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1686606653, now seen corresponding path program 5 times [2021-12-06 17:50:56,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:56,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985079457] [2021-12-06 17:50:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:56,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:56,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:56,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985079457] [2021-12-06 17:50:56,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985079457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:56,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725625493] [2021-12-06 17:50:56,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:50:56,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:56,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:56,855 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:56,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 17:50:57,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 17:50:57,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 17:50:57,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:57,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:50:57,479 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 14 treesize of output 10 [2021-12-06 17:50:57,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:50:57,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:50:57,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:50:57,829 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 17:50:57,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-06 17:50:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 17:50:57,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:57,904 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2391 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2391) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2021-12-06 17:50:57,909 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2391 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2391) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2021-12-06 17:50:57,920 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2391 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2391) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) is different from false [2021-12-06 17:50:57,932 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2391 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2391) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 3)) 0)) is different from false [2021-12-06 17:50:57,938 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2391 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_2391) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 3 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0)) is different from false [2021-12-06 17:50:57,944 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2391 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_2391) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 3)) 0)) is different from false [2021-12-06 17:50:57,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:50:57,948 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:50:57,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:50:57,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 17:50:57,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:50:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 29 not checked. [2021-12-06 17:50:58,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725625493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:58,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:58,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 47 [2021-12-06 17:50:58,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201977308] [2021-12-06 17:50:58,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:58,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 17:50:58,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:58,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 17:50:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1508, Unknown=6, NotChecked=498, Total=2162 [2021-12-06 17:50:58,112 INFO L87 Difference]: Start difference. First operand 750 states and 826 transitions. Second operand has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:59,602 INFO L93 Difference]: Finished difference Result 955 states and 1034 transitions. [2021-12-06 17:50:59,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 17:50:59,602 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 17:50:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:59,605 INFO L225 Difference]: With dead ends: 955 [2021-12-06 17:50:59,605 INFO L226 Difference]: Without dead ends: 831 [2021-12-06 17:50:59,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 89 ConstructedPredicates, 6 IntricatePredicates, 3 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=599, Invalid=6559, Unknown=6, NotChecked=1026, Total=8190 [2021-12-06 17:50:59,606 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 249 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 794 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:59,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 801 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 738 Invalid, 0 Unknown, 794 Unchecked, 0.3s Time] [2021-12-06 17:50:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-12-06 17:50:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 800. [2021-12-06 17:50:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 796 states have (on average 1.1055276381909547) internal successors, (880), 799 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 880 transitions. [2021-12-06 17:50:59,613 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 880 transitions. Word has length 77 [2021-12-06 17:50:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:59,613 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 880 transitions. [2021-12-06 17:50:59,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 880 transitions. [2021-12-06 17:50:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 17:50:59,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:59,614 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:59,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-06 17:50:59,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:59,815 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:50:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:59,815 INFO L85 PathProgramCache]: Analyzing trace with hash 699436083, now seen corresponding path program 1 times [2021-12-06 17:50:59,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:59,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100806216] [2021-12-06 17:50:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:59,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:01,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:01,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100806216] [2021-12-06 17:51:01,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100806216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:01,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540832228] [2021-12-06 17:51:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:01,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:01,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:01,401 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:01,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 17:51:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:01,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 17:51:01,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:01,576 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:51:01,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:51:02,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:51:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2021-12-06 17:51:02,620 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 17 treesize of output 13 [2021-12-06 17:51:02,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:51:09,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:51:09,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:51:09,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:51:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:51:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:51:09,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:51:09,681 INFO L354 Elim1Store]: treesize reduction 34, result has 46.0 percent of original size [2021-12-06 17:51:09,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 47 [2021-12-06 17:51:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 128 refuted. 10 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:51:09,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:10,858 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2458 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2458) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)))) (<= (+ (* 4294967296 (div (+ 4294967294 |c_ULTIMATE.start_main_~n~0#1|) 4294967296)) 1) |c_ULTIMATE.start_main_~n~0#1|)) is different from false [2021-12-06 17:51:10,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:51:10,867 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 63 [2021-12-06 17:51:10,894 INFO L354 Elim1Store]: treesize reduction 96, result has 29.9 percent of original size [2021-12-06 17:51:10,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 121 [2021-12-06 17:51:10,901 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-12-06 17:51:10,901 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 45 treesize of output 29 [2021-12-06 17:51:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 33 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:51:14,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540832228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:14,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:14,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 96 [2021-12-06 17:51:14,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400032207] [2021-12-06 17:51:14,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:14,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 17:51:14,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:14,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 17:51:14,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=8303, Unknown=14, NotChecked=186, Total=9120 [2021-12-06 17:51:14,174 INFO L87 Difference]: Start difference. First operand 800 states and 880 transitions. Second operand has 96 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:29,004 INFO L93 Difference]: Finished difference Result 1066 states and 1146 transitions. [2021-12-06 17:51:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-06 17:51:29,005 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-06 17:51:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:29,008 INFO L225 Difference]: With dead ends: 1066 [2021-12-06 17:51:29,008 INFO L226 Difference]: Without dead ends: 1034 [2021-12-06 17:51:29,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 169 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7853 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=3289, Invalid=25428, Unknown=17, NotChecked=336, Total=29070 [2021-12-06 17:51:29,010 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 1201 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 3713 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 4574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 3713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:29,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 1486 Invalid, 4574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 3713 Invalid, 0 Unknown, 493 Unchecked, 2.6s Time] [2021-12-06 17:51:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-12-06 17:51:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 754. [2021-12-06 17:51:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 750 states have (on average 1.0986666666666667) internal successors, (824), 753 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 824 transitions. [2021-12-06 17:51:29,018 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 824 transitions. Word has length 78 [2021-12-06 17:51:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:29,018 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 824 transitions. [2021-12-06 17:51:29,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 824 transitions. [2021-12-06 17:51:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 17:51:29,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:29,019 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:29,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:29,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-06 17:51:29,220 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:51:29,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:29,221 INFO L85 PathProgramCache]: Analyzing trace with hash 39114724, now seen corresponding path program 3 times [2021-12-06 17:51:29,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:29,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196817233] [2021-12-06 17:51:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:29,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:51:29,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:29,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196817233] [2021-12-06 17:51:29,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196817233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:29,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665993910] [2021-12-06 17:51:29,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:51:29,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:29,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:29,454 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:29,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 17:51:29,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 17:51:29,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:29,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 17:51:29,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:29,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:51:29,909 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 14 treesize of output 10 [2021-12-06 17:51:30,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:51:30,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:51:30,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:51:30,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:51:30,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:51:30,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-06 17:51:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 17:51:30,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:30,483 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2021-12-06 17:51:30,488 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2021-12-06 17:51:30,501 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) is different from false [2021-12-06 17:51:30,516 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 3)) 0)) is different from false [2021-12-06 17:51:30,525 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 3 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0)) is different from false [2021-12-06 17:51:30,529 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 3)) 0)) is different from false [2021-12-06 17:51:30,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:51:30,533 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:51:30,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:51:30,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 17:51:30,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:51:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 29 not checked. [2021-12-06 17:51:30,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665993910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:30,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:30,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 18] total 55 [2021-12-06 17:51:30,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116868979] [2021-12-06 17:51:30,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:30,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 17:51:30,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:30,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 17:51:30,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2186, Unknown=6, NotChecked=594, Total=2970 [2021-12-06 17:51:30,788 INFO L87 Difference]: Start difference. First operand 754 states and 824 transitions. Second operand has 55 states, 55 states have (on average 3.1818181818181817) internal successors, (175), 55 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:32,169 WARN L838 $PredicateComparison]: unable to prove that (and (<= 1 |c_ULTIMATE.start_cstrncat_~n#1|) (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 3)) 0)) (<= |c_ULTIMATE.start_cstrncat_~n#1| 3)) is different from false [2021-12-06 17:51:32,269 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) (<= 1 |c_ULTIMATE.start_cstrncat_~n#1|) (<= |c_ULTIMATE.start_cstrncat_~n#1| 3)) is different from false [2021-12-06 17:51:32,480 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (div |c_ULTIMATE.start_cstrncat_#t~pre4#1| 4294967296))) (and (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) (<= |c_ULTIMATE.start_cstrncat_~n#1| 2) (or (<= |c_ULTIMATE.start_cstrncat_#t~pre4#1| (* 4294967296 .cse0)) (<= |c_ULTIMATE.start_cstrncat_#t~pre4#1| |c_ULTIMATE.start_cstrncat_~n#1|)) (< 0 (+ .cse0 1)))) is different from false [2021-12-06 17:51:32,496 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) (<= |c_ULTIMATE.start_cstrncat_~n#1| 2) (<= 1 |c_ULTIMATE.start_cstrncat_~n#1|)) is different from false [2021-12-06 17:51:32,500 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) (<= |c_ULTIMATE.start_cstrncat_~n#1| 2) (<= 1 |c_ULTIMATE.start_cstrncat_~n#1|)) is different from false [2021-12-06 17:51:32,699 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) (let ((.cse0 (* 4294967296 (div |c_ULTIMATE.start_cstrncat_#t~pre4#1| 4294967296)))) (or (<= |c_ULTIMATE.start_cstrncat_#t~pre4#1| .cse0) (<= |c_ULTIMATE.start_cstrncat_#t~pre4#1| (+ |c_ULTIMATE.start_cstrncat_~n#1| .cse0)))) (<= |c_ULTIMATE.start_cstrncat_~n#1| 1)) is different from false [2021-12-06 17:51:32,713 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) (<= |c_ULTIMATE.start_cstrncat_~n#1| 1) (<= 1 |c_ULTIMATE.start_cstrncat_~n#1|)) is different from false [2021-12-06 17:51:32,733 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_cstrncat_~n#1| 1) (<= 1 |c_ULTIMATE.start_cstrncat_~n#1|) (forall ((v_ArrVal_2534 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2534) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0))) is different from false [2021-12-06 17:51:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:32,904 INFO L93 Difference]: Finished difference Result 1258 states and 1344 transitions. [2021-12-06 17:51:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-06 17:51:32,904 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.1818181818181817) internal successors, (175), 55 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 17:51:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:32,906 INFO L225 Difference]: With dead ends: 1258 [2021-12-06 17:51:32,906 INFO L226 Difference]: Without dead ends: 851 [2021-12-06 17:51:32,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 14 IntricatePredicates, 4 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=744, Invalid=9398, Unknown=14, NotChecked=2954, Total=13110 [2021-12-06 17:51:32,907 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 271 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 882 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:32,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 939 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 824 Invalid, 0 Unknown, 882 Unchecked, 0.3s Time] [2021-12-06 17:51:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-12-06 17:51:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 800. [2021-12-06 17:51:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 796 states have (on average 1.0979899497487438) internal successors, (874), 799 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 874 transitions. [2021-12-06 17:51:32,915 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 874 transitions. Word has length 79 [2021-12-06 17:51:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:32,915 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 874 transitions. [2021-12-06 17:51:32,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.1818181818181817) internal successors, (175), 55 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 874 transitions. [2021-12-06 17:51:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 17:51:32,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:32,916 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:32,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 17:51:33,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-06 17:51:33,117 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:51:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1217012861, now seen corresponding path program 11 times [2021-12-06 17:51:33,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:33,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376803257] [2021-12-06 17:51:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:33,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 153 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:33,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376803257] [2021-12-06 17:51:33,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376803257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045076613] [2021-12-06 17:51:33,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:51:33,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:33,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:33,483 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:33,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 17:51:33,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-06 17:51:33,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:33,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 17:51:33,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:33,693 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:51:33,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:51:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:35,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 231 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:36,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045076613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:36,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:36,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 80 [2021-12-06 17:51:36,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874637108] [2021-12-06 17:51:36,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:36,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 17:51:36,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:36,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 17:51:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=5822, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 17:51:36,714 INFO L87 Difference]: Start difference. First operand 800 states and 874 transitions. Second operand has 81 states, 80 states have (on average 2.9) internal successors, (232), 81 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:39,386 INFO L93 Difference]: Finished difference Result 1617 states and 1717 transitions. [2021-12-06 17:51:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 17:51:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 2.9) internal successors, (232), 81 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 17:51:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:39,388 INFO L225 Difference]: With dead ends: 1617 [2021-12-06 17:51:39,389 INFO L226 Difference]: Without dead ends: 1583 [2021-12-06 17:51:39,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3868 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2463, Invalid=14829, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 17:51:39,389 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 533 mSDsluCounter, 2705 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2805 SdHoareTripleChecker+Invalid, 3401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1616 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:39,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 2805 Invalid, 3401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1721 Invalid, 0 Unknown, 1616 Unchecked, 0.6s Time] [2021-12-06 17:51:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-12-06 17:51:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 838. [2021-12-06 17:51:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 834 states have (on average 1.0959232613908874) internal successors, (914), 837 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 914 transitions. [2021-12-06 17:51:39,398 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 914 transitions. Word has length 80 [2021-12-06 17:51:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:39,398 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 914 transitions. [2021-12-06 17:51:39,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 2.9) internal successors, (232), 81 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 914 transitions. [2021-12-06 17:51:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 17:51:39,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:39,399 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:39,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-06 17:51:39,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-06 17:51:39,600 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:51:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:39,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1318254212, now seen corresponding path program 12 times [2021-12-06 17:51:39,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:39,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296687457] [2021-12-06 17:51:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:39,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 105 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:51:42,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:42,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296687457] [2021-12-06 17:51:42,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296687457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:42,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202761782] [2021-12-06 17:51:42,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:51:42,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:42,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:42,498 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:42,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 17:51:42,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-06 17:51:42,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:42,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-06 17:51:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:42,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:51:43,786 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 17 treesize of output 13 [2021-12-06 17:51:43,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:51:46,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:51:46,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 95 treesize of output 47 [2021-12-06 17:51:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 33 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:51:46,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:47,338 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2665 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2665) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= 0 (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)))) is different from false [2021-12-06 17:51:47,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:51:47,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 145 [2021-12-06 17:51:47,539 INFO L354 Elim1Store]: treesize reduction 704, result has 13.6 percent of original size [2021-12-06 17:51:47,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 286 treesize of output 322 [2021-12-06 17:51:47,567 INFO L354 Elim1Store]: treesize reduction 640, result has 0.2 percent of original size [2021-12-06 17:51:47,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 120 treesize of output 78 [2021-12-06 17:51:52,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:51:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 143 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:51:53,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202761782] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:53,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:53,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 100 [2021-12-06 17:51:53,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404748145] [2021-12-06 17:51:53,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:53,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-06 17:51:53,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:53,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-06 17:51:53,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=8993, Unknown=1, NotChecked=194, Total=9900 [2021-12-06 17:51:53,091 INFO L87 Difference]: Start difference. First operand 838 states and 914 transitions. Second operand has 100 states, 100 states have (on average 2.13) internal successors, (213), 100 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:20,153 INFO L93 Difference]: Finished difference Result 2428 states and 2578 transitions. [2021-12-06 17:53:20,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-12-06 17:53:20,153 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.13) internal successors, (213), 100 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 17:53:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:20,155 INFO L225 Difference]: With dead ends: 2428 [2021-12-06 17:53:20,156 INFO L226 Difference]: Without dead ends: 2348 [2021-12-06 17:53:20,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 105 SyntacticMatches, 51 SemanticMatches, 295 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34364 ImplicationChecksByTransitivity, 87.9s TimeCoverageRelationStatistics Valid=9708, Invalid=77614, Unknown=2, NotChecked=588, Total=87912 [2021-12-06 17:53:20,159 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 2834 mSDsluCounter, 3314 mSDsCounter, 0 mSdLazyCounter, 9716 mSolverCounterSat, 1356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2834 SdHoareTripleChecker+Valid, 3409 SdHoareTripleChecker+Invalid, 11524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1356 IncrementalHoareTripleChecker+Valid, 9716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:20,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2834 Valid, 3409 Invalid, 11524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1356 Valid, 9716 Invalid, 0 Unknown, 452 Unchecked, 6.4s Time] [2021-12-06 17:53:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-12-06 17:53:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 882. [2021-12-06 17:53:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 878 states have (on average 1.0968109339407746) internal successors, (963), 881 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 963 transitions. [2021-12-06 17:53:20,170 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 963 transitions. Word has length 82 [2021-12-06 17:53:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:20,170 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 963 transitions. [2021-12-06 17:53:20,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.13) internal successors, (213), 100 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 963 transitions. [2021-12-06 17:53:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:53:20,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:20,171 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:20,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-06 17:53:20,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:20,372 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:53:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1236479569, now seen corresponding path program 2 times [2021-12-06 17:53:20,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:20,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657831773] [2021-12-06 17:53:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:20,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 154 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:53:21,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:21,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657831773] [2021-12-06 17:53:21,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657831773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:21,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495491996] [2021-12-06 17:53:21,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:53:21,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:21,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:21,692 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:21,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 17:53:21,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:53:21,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:21,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-06 17:53:21,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:21,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:53:22,537 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 17 treesize of output 13 [2021-12-06 17:53:22,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:53:36,236 INFO L354 Elim1Store]: treesize reduction 156, result has 18.3 percent of original size [2021-12-06 17:53:36,236 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 57 [2021-12-06 17:53:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 11 proven. 163 refuted. 17 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:53:36,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:37,618 WARN L838 $PredicateComparison]: unable to prove that (or (<= (+ (* 4294967296 (div (+ 4294967294 |c_ULTIMATE.start_main_~n~0#1|) 4294967296)) 1) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_2736 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2736) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0))))) is different from false [2021-12-06 17:53:37,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:53:37,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 75 [2021-12-06 17:53:37,669 INFO L354 Elim1Store]: treesize reduction 150, result has 25.4 percent of original size [2021-12-06 17:53:37,669 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 140 treesize of output 150 [2021-12-06 17:53:37,678 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-12-06 17:53:37,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 36 [2021-12-06 17:53:40,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:53:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 49 proven. 142 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:53:40,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495491996] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:40,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:40,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 94 [2021-12-06 17:53:40,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176355715] [2021-12-06 17:53:40,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:40,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 17:53:40,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:40,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 17:53:40,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=7875, Unknown=25, NotChecked=182, Total=8742 [2021-12-06 17:53:40,510 INFO L87 Difference]: Start difference. First operand 882 states and 963 transitions. Second operand has 94 states, 94 states have (on average 2.3617021276595747) internal successors, (222), 94 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:45,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:45,466 INFO L93 Difference]: Finished difference Result 974 states and 1059 transitions. [2021-12-06 17:53:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 17:53:45,467 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.3617021276595747) internal successors, (222), 94 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-06 17:53:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:45,468 INFO L225 Difference]: With dead ends: 974 [2021-12-06 17:53:45,468 INFO L226 Difference]: Without dead ends: 894 [2021-12-06 17:53:45,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5357 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=1917, Invalid=16968, Unknown=25, NotChecked=272, Total=19182 [2021-12-06 17:53:45,469 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 452 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:45,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 1075 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1425 Invalid, 0 Unknown, 346 Unchecked, 0.9s Time] [2021-12-06 17:53:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-12-06 17:53:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 886. [2021-12-06 17:53:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 882 states have (on average 1.0997732426303855) internal successors, (970), 885 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 970 transitions. [2021-12-06 17:53:45,478 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 970 transitions. Word has length 84 [2021-12-06 17:53:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:45,478 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 970 transitions. [2021-12-06 17:53:45,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.3617021276595747) internal successors, (222), 94 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 970 transitions. [2021-12-06 17:53:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 17:53:45,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:45,479 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:45,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-06 17:53:45,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:45,681 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:53:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash -427473737, now seen corresponding path program 6 times [2021-12-06 17:53:45,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:45,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666393243] [2021-12-06 17:53:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:45,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 17:53:45,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666393243] [2021-12-06 17:53:45,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666393243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086450546] [2021-12-06 17:53:45,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:53:45,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:45,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:45,885 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:45,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 17:53:46,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 17:53:46,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 17:53:46,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 17:53:46,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:46,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 17:53:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 17:53:46,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086450546] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:46,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:46,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2021-12-06 17:53:46,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447105153] [2021-12-06 17:53:46,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:46,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 17:53:46,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:46,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 17:53:46,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1752, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 17:53:46,979 INFO L87 Difference]: Start difference. First operand 886 states and 970 transitions. Second operand has 45 states, 44 states have (on average 3.9318181818181817) internal successors, (173), 45 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:47,769 INFO L93 Difference]: Finished difference Result 987 states and 1059 transitions. [2021-12-06 17:53:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 17:53:47,769 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.9318181818181817) internal successors, (173), 45 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 17:53:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:47,770 INFO L225 Difference]: With dead ends: 987 [2021-12-06 17:53:47,770 INFO L226 Difference]: Without dead ends: 987 [2021-12-06 17:53:47,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=3378, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 17:53:47,771 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 608 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:47,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 587 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:53:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-12-06 17:53:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 930. [2021-12-06 17:53:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 926 states have (on average 1.093952483801296) internal successors, (1013), 929 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1013 transitions. [2021-12-06 17:53:47,777 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1013 transitions. Word has length 85 [2021-12-06 17:53:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:47,778 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1013 transitions. [2021-12-06 17:53:47,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.9318181818181817) internal successors, (173), 45 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1013 transitions. [2021-12-06 17:53:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 17:53:47,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:47,779 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:47,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-06 17:53:47,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-12-06 17:53:47,980 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:53:47,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:47,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1317537025, now seen corresponding path program 13 times [2021-12-06 17:53:47,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:47,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617627285] [2021-12-06 17:53:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:47,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:48,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:48,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617627285] [2021-12-06 17:53:48,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617627285] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:48,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630533098] [2021-12-06 17:53:48,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:53:48,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:48,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:48,404 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:48,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 17:53:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:48,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 17:53:48,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:53:48,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:53:48,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:53:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:49,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 276 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:50,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630533098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:50,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:50,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 84 [2021-12-06 17:53:50,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851585014] [2021-12-06 17:53:50,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:50,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 17:53:50,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:50,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 17:53:50,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=6310, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 17:53:50,431 INFO L87 Difference]: Start difference. First operand 930 states and 1013 transitions. Second operand has 85 states, 84 states have (on average 2.9523809523809526) internal successors, (248), 85 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:52,422 INFO L93 Difference]: Finished difference Result 2546 states and 2686 transitions. [2021-12-06 17:53:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 17:53:52,422 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 2.9523809523809526) internal successors, (248), 85 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-06 17:53:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:52,424 INFO L225 Difference]: With dead ends: 2546 [2021-12-06 17:53:52,424 INFO L226 Difference]: Without dead ends: 2512 [2021-12-06 17:53:52,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2158, Invalid=9832, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 17:53:52,425 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 975 mSDsluCounter, 2802 mSDsCounter, 0 mSdLazyCounter, 4251 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 2921 SdHoareTripleChecker+Invalid, 4431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:52,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 2921 Invalid, 4431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 4251 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 17:53:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-12-06 17:53:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 974. [2021-12-06 17:53:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 970 states have (on average 1.0917525773195875) internal successors, (1059), 973 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1059 transitions. [2021-12-06 17:53:52,435 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1059 transitions. Word has length 86 [2021-12-06 17:53:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:52,435 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1059 transitions. [2021-12-06 17:53:52,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 2.9523809523809526) internal successors, (248), 85 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:52,436 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1059 transitions. [2021-12-06 17:53:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 17:53:52,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:52,437 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:52,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-06 17:53:52,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:52,638 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:53:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:52,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1357118384, now seen corresponding path program 3 times [2021-12-06 17:53:52,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:52,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762297698] [2021-12-06 17:53:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:52,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:53:53,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762297698] [2021-12-06 17:53:53,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762297698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566321661] [2021-12-06 17:53:53,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:53:53,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:53,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:53,284 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:53,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 17:53:53,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 17:53:53,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:53,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 17:53:53,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:53,676 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:53:53,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:53:53,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:53:54,246 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 19 treesize of output 15 [2021-12-06 17:53:54,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 17:53:54,677 INFO L354 Elim1Store]: treesize reduction 8, result has 79.5 percent of original size [2021-12-06 17:53:54,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2021-12-06 17:53:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 17:53:55,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:57,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:53:57,615 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 35 [2021-12-06 17:53:57,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:53:57,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 75 [2021-12-06 17:53:57,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:53:57,647 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 19 treesize of output 23 [2021-12-06 17:53:59,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:53:59,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:54:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 15 proven. 82 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 17:54:00,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566321661] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:00,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:00,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 82 [2021-12-06 17:54:00,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373765963] [2021-12-06 17:54:00,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:00,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 17:54:00,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:00,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 17:54:00,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=6172, Unknown=1, NotChecked=0, Total=6642 [2021-12-06 17:54:00,017 INFO L87 Difference]: Start difference. First operand 974 states and 1059 transitions. Second operand has 82 states, 82 states have (on average 2.5365853658536586) internal successors, (208), 82 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:17,921 INFO L93 Difference]: Finished difference Result 1768 states and 1877 transitions. [2021-12-06 17:54:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-12-06 17:54:17,921 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.5365853658536586) internal successors, (208), 82 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-06 17:54:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:17,923 INFO L225 Difference]: With dead ends: 1768 [2021-12-06 17:54:17,923 INFO L226 Difference]: Without dead ends: 1694 [2021-12-06 17:54:17,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13987 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=5928, Invalid=45827, Unknown=1, NotChecked=0, Total=51756 [2021-12-06 17:54:17,925 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 814 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 3485 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 5130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 3485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 838 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:17,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 678 Invalid, 5130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 3485 Invalid, 0 Unknown, 838 Unchecked, 2.6s Time] [2021-12-06 17:54:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-12-06 17:54:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 952. [2021-12-06 17:54:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 948 states have (on average 1.090717299578059) internal successors, (1034), 951 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1034 transitions. [2021-12-06 17:54:17,933 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1034 transitions. Word has length 86 [2021-12-06 17:54:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:17,933 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1034 transitions. [2021-12-06 17:54:17,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.5365853658536586) internal successors, (208), 82 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:17,934 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1034 transitions. [2021-12-06 17:54:17,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 17:54:17,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:17,935 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:17,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 17:54:18,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:18,136 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:54:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash 862271992, now seen corresponding path program 14 times [2021-12-06 17:54:18,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:18,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775954561] [2021-12-06 17:54:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:18,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 146 proven. 298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:54:21,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:21,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775954561] [2021-12-06 17:54:21,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775954561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:21,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557161045] [2021-12-06 17:54:21,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:54:21,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:21,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:21,058 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:21,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 17:54:21,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:54:21,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:21,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-06 17:54:21,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:22,435 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 17 treesize of output 13 [2021-12-06 17:54:22,530 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-12-06 17:54:22,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:54:25,664 INFO L354 Elim1Store]: treesize reduction 108, result has 40.7 percent of original size [2021-12-06 17:54:25,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 66 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 115 treesize of output 127 [2021-12-06 17:54:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 36 proven. 408 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:54:26,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:28,731 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 11)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)))) is different from false [2021-12-06 17:54:28,763 INFO L354 Elim1Store]: treesize reduction 770, result has 0.1 percent of original size [2021-12-06 17:54:28,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 723 treesize of output 653 [2021-12-06 17:54:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 168 proven. 276 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:54:33,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557161045] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:33,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:33,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 106 [2021-12-06 17:54:33,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474039779] [2021-12-06 17:54:33,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:33,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-12-06 17:54:33,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:33,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-12-06 17:54:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=973, Invalid=9950, Unknown=1, NotChecked=206, Total=11130 [2021-12-06 17:54:33,224 INFO L87 Difference]: Start difference. First operand 952 states and 1034 transitions. Second operand has 106 states, 106 states have (on average 2.141509433962264) internal successors, (227), 106 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:37,398 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) (.cse0 (< 13 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|)))) (and (or (<= 1 |c_ULTIMATE.start_main_~n~0#1|) .cse0) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 11)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) .cse2 (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse3 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 11)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse3 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)))) (or .cse2 .cse0) (or (= |c_ULTIMATE.start_main_~length1~0#1| (+ 6 |c_ULTIMATE.start_main_~n~0#1|)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 4)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 11)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ 7 |c_ULTIMATE.start_main_~n~0#1|)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 12)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ 5 |c_ULTIMATE.start_main_~n~0#1|)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 1)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 8)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ 9 |c_ULTIMATE.start_main_~n~0#1|)) (= (+ 3 |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|) (= |c_ULTIMATE.start_main_~length1~0#1| (+ 2 |c_ULTIMATE.start_main_~n~0#1|)) (= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| 10))))) is different from false [2021-12-06 17:54:39,133 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~length1~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 12) (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~length1~0#1| 13) (= |c_ULTIMATE.start_main_~length2~0#1| 1) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~n~0#1|) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 11)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)))) (exists ((|ULTIMATE.start_main_~length1~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (and (<= (+ |c_ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~length1~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~length1~0#1| (* |ULTIMATE.start_main_~n~0#1| (- 1)))) 0) (<= |ULTIMATE.start_main_~length1~0#1| 13) (<= 1 |ULTIMATE.start_main_~n~0#1|)))) is different from false [2021-12-06 17:54:45,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:45,880 INFO L93 Difference]: Finished difference Result 1806 states and 1933 transitions. [2021-12-06 17:54:45,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 17:54:45,880 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.141509433962264) internal successors, (227), 106 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-06 17:54:45,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:45,881 INFO L225 Difference]: With dead ends: 1806 [2021-12-06 17:54:45,882 INFO L226 Difference]: Without dead ends: 1720 [2021-12-06 17:54:45,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 12952 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=3054, Invalid=30995, Unknown=3, NotChecked=1104, Total=35156 [2021-12-06 17:54:45,883 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 358 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1265 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:45,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1203 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2140 Invalid, 0 Unknown, 1265 Unchecked, 1.7s Time] [2021-12-06 17:54:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2021-12-06 17:54:45,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 996. [2021-12-06 17:54:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 992 states have (on average 1.091733870967742) internal successors, (1083), 995 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1083 transitions. [2021-12-06 17:54:45,891 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1083 transitions. Word has length 88 [2021-12-06 17:54:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:45,892 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1083 transitions. [2021-12-06 17:54:45,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.141509433962264) internal successors, (227), 106 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1083 transitions. [2021-12-06 17:54:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 17:54:45,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:45,893 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:45,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-06 17:54:46,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-12-06 17:54:46,094 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:54:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1275029995, now seen corresponding path program 4 times [2021-12-06 17:54:46,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:46,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447677063] [2021-12-06 17:54:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:46,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 50 proven. 191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:54:47,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:47,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447677063] [2021-12-06 17:54:47,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447677063] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:47,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825128589] [2021-12-06 17:54:47,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:54:47,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:47,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:47,393 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:47,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 17:54:47,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:54:47,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:47,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-06 17:54:47,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:47,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:54:47,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:54:48,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-06 17:54:48,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:54:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,816 INFO L354 Elim1Store]: treesize reduction 39, result has 51.9 percent of original size [2021-12-06 17:54:49,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 68 [2021-12-06 17:54:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 3 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:54:50,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:52,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:54:52,859 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 87 [2021-12-06 17:54:52,924 INFO L354 Elim1Store]: treesize reduction 216, result has 22.0 percent of original size [2021-12-06 17:54:52,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 165 treesize of output 179 [2021-12-06 17:54:52,939 INFO L354 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2021-12-06 17:54:52,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 43 [2021-12-06 17:54:56,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:54:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 56 proven. 181 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:54:56,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825128589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:56,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:56,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 37] total 107 [2021-12-06 17:54:56,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964625022] [2021-12-06 17:54:56,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:56,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-06 17:54:56,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:56,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-06 17:54:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=10587, Unknown=1, NotChecked=0, Total=11342 [2021-12-06 17:54:56,475 INFO L87 Difference]: Start difference. First operand 996 states and 1083 transitions. Second operand has 107 states, 107 states have (on average 2.3738317757009346) internal successors, (254), 107 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:04,723 INFO L93 Difference]: Finished difference Result 1098 states and 1191 transitions. [2021-12-06 17:55:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 17:55:04,724 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.3738317757009346) internal successors, (254), 107 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-06 17:55:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:04,725 INFO L225 Difference]: With dead ends: 1098 [2021-12-06 17:55:04,725 INFO L226 Difference]: Without dead ends: 1032 [2021-12-06 17:55:04,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7165 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=2076, Invalid=24655, Unknown=1, NotChecked=0, Total=26732 [2021-12-06 17:55:04,726 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 425 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 371 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:04,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 945 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1722 Invalid, 0 Unknown, 371 Unchecked, 1.1s Time] [2021-12-06 17:55:04,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-12-06 17:55:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1024. [2021-12-06 17:55:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1020 states have (on average 1.0950980392156864) internal successors, (1117), 1023 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1117 transitions. [2021-12-06 17:55:04,733 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1117 transitions. Word has length 90 [2021-12-06 17:55:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:04,733 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1117 transitions. [2021-12-06 17:55:04,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.3738317757009346) internal successors, (254), 107 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1117 transitions. [2021-12-06 17:55:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 17:55:04,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:04,734 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:04,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 17:55:04,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-06 17:55:04,935 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:55:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:04,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1609210724, now seen corresponding path program 7 times [2021-12-06 17:55:04,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:04,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854507267] [2021-12-06 17:55:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:04,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 63 proven. 116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:55:05,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:05,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854507267] [2021-12-06 17:55:05,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854507267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:05,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566262272] [2021-12-06 17:55:05,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:55:05,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:05,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:05,211 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:05,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 17:55:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:05,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 17:55:05,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:05,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:55:05,515 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 14 treesize of output 10 [2021-12-06 17:55:05,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:55:05,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:55:05,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:55:05,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:55:05,962 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 17:55:05,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-06 17:55:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 17:55:05,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:06,033 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3197 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_3197) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2021-12-06 17:55:06,037 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3197 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_3197) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2021-12-06 17:55:06,048 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3197 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_3197) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) is different from false [2021-12-06 17:55:06,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3197 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_3197) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 3)) 0)) is different from false [2021-12-06 17:55:06,074 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3197 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_3197) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 4)))) is different from false [2021-12-06 17:55:06,080 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3197 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_3197) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 4 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0)) is different from false [2021-12-06 17:55:06,083 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3197 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_3197) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 4)) 0)) is different from false [2021-12-06 17:55:06,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:55:06,087 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:55:06,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:55:06,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 17:55:06,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:55:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 51 not checked. [2021-12-06 17:55:06,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566262272] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:06,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:06,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 52 [2021-12-06 17:55:06,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115156797] [2021-12-06 17:55:06,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:06,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 17:55:06,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:06,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 17:55:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1829, Unknown=7, NotChecked=644, Total=2652 [2021-12-06 17:55:06,255 INFO L87 Difference]: Start difference. First operand 1024 states and 1117 transitions. Second operand has 52 states, 52 states have (on average 3.4423076923076925) internal successors, (179), 52 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:07,652 INFO L93 Difference]: Finished difference Result 1270 states and 1370 transitions. [2021-12-06 17:55:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 17:55:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.4423076923076925) internal successors, (179), 52 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-06 17:55:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:07,654 INFO L225 Difference]: With dead ends: 1270 [2021-12-06 17:55:07,654 INFO L226 Difference]: Without dead ends: 1094 [2021-12-06 17:55:07,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 159 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 7 IntricatePredicates, 6 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=576, Invalid=7101, Unknown=7, NotChecked=1246, Total=8930 [2021-12-06 17:55:07,655 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:07,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 494 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 496 Invalid, 0 Unknown, 763 Unchecked, 0.2s Time] [2021-12-06 17:55:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-12-06 17:55:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1084. [2021-12-06 17:55:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1080 states have (on average 1.0944444444444446) internal successors, (1182), 1083 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1182 transitions. [2021-12-06 17:55:07,667 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1182 transitions. Word has length 91 [2021-12-06 17:55:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:07,667 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 1182 transitions. [2021-12-06 17:55:07,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.4423076923076925) internal successors, (179), 52 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1182 transitions. [2021-12-06 17:55:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 17:55:07,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:07,668 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:07,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-06 17:55:07,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-06 17:55:07,869 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:55:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1401404731, now seen corresponding path program 15 times [2021-12-06 17:55:07,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954870101] [2021-12-06 17:55:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:07,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 231 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:08,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:08,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954870101] [2021-12-06 17:55:08,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954870101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:08,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714968779] [2021-12-06 17:55:08,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:55:08,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:08,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:08,286 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:08,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 17:55:08,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 17:55:08,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:08,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 17:55:08,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:08,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:55:08,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:55:08,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:55:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 276 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:09,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 325 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:10,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714968779] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:10,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:10,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2021-12-06 17:55:10,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346234131] [2021-12-06 17:55:10,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:10,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 17:55:10,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:10,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 17:55:10,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=7250, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 17:55:10,908 INFO L87 Difference]: Start difference. First operand 1084 states and 1182 transitions. Second operand has 92 states, 91 states have (on average 2.923076923076923) internal successors, (266), 92 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:12,846 INFO L93 Difference]: Finished difference Result 2950 states and 3113 transitions. [2021-12-06 17:55:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 17:55:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 2.923076923076923) internal successors, (266), 92 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-06 17:55:12,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:12,850 INFO L225 Difference]: With dead ends: 2950 [2021-12-06 17:55:12,850 INFO L226 Difference]: Without dead ends: 2916 [2021-12-06 17:55:12,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3727 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2824, Invalid=11456, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 17:55:12,851 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 1412 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:12,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 1862 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 2601 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:55:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-12-06 17:55:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 1128. [2021-12-06 17:55:12,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1124 states have (on average 1.092526690391459) internal successors, (1228), 1127 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1228 transitions. [2021-12-06 17:55:12,863 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1228 transitions. Word has length 92 [2021-12-06 17:55:12,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:12,863 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1228 transitions. [2021-12-06 17:55:12,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 2.923076923076923) internal successors, (266), 92 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1228 transitions. [2021-12-06 17:55:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 17:55:12,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:12,864 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:12,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-06 17:55:13,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-06 17:55:13,066 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:55:13,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:13,067 INFO L85 PathProgramCache]: Analyzing trace with hash -749604789, now seen corresponding path program 4 times [2021-12-06 17:55:13,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:13,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908617388] [2021-12-06 17:55:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:13,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 63 proven. 116 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:55:13,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908617388] [2021-12-06 17:55:13,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908617388] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917654663] [2021-12-06 17:55:13,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:55:13,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:13,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:13,323 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:13,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-06 17:55:13,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:55:13,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:13,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 17:55:13,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:13,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:55:13,765 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 14 treesize of output 10 [2021-12-06 17:55:13,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:55:13,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:55:14,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:55:14,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:55:14,258 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 17:55:14,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-06 17:55:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-06 17:55:14,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:14,341 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3359 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_3359) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2021-12-06 17:55:14,346 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3359 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_3359) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2021-12-06 17:55:14,360 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3359 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_3359) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) is different from false [2021-12-06 17:55:14,374 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3359 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_3359) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 3)) 0)) is different from false [2021-12-06 17:55:14,388 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3359 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_3359) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 4)) 0)) is different from false [2021-12-06 17:55:14,399 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3359 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_3359) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 4 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0)) is different from false [2021-12-06 17:55:14,403 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3359 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_3359) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 4)) 0)) is different from false [2021-12-06 17:55:14,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:55:14,410 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:55:14,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:55:14,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 17:55:14,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:55:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 93 trivial. 51 not checked. [2021-12-06 17:55:14,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917654663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:14,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:14,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 52 [2021-12-06 17:55:14,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334712692] [2021-12-06 17:55:14,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:14,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 17:55:14,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 17:55:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1829, Unknown=7, NotChecked=644, Total=2652 [2021-12-06 17:55:14,583 INFO L87 Difference]: Start difference. First operand 1128 states and 1228 transitions. Second operand has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:16,262 INFO L93 Difference]: Finished difference Result 1679 states and 1800 transitions. [2021-12-06 17:55:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 17:55:16,262 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-06 17:55:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:16,264 INFO L225 Difference]: With dead ends: 1679 [2021-12-06 17:55:16,264 INFO L226 Difference]: Without dead ends: 1254 [2021-12-06 17:55:16,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 155 SyntacticMatches, 8 SemanticMatches, 99 ConstructedPredicates, 7 IntricatePredicates, 4 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=689, Invalid=8074, Unknown=7, NotChecked=1330, Total=10100 [2021-12-06 17:55:16,264 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 300 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1439 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:16,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 1072 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 955 Invalid, 0 Unknown, 1439 Unchecked, 0.3s Time] [2021-12-06 17:55:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-12-06 17:55:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1180. [2021-12-06 17:55:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1176 states have (on average 1.0918367346938775) internal successors, (1284), 1179 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1284 transitions. [2021-12-06 17:55:16,276 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1284 transitions. Word has length 93 [2021-12-06 17:55:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:16,276 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 1284 transitions. [2021-12-06 17:55:16,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1284 transitions. [2021-12-06 17:55:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-06 17:55:16,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:16,277 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:16,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-06 17:55:16,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:16,478 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:55:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1869783756, now seen corresponding path program 16 times [2021-12-06 17:55:16,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:16,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552789888] [2021-12-06 17:55:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:16,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 149 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:55:19,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:19,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552789888] [2021-12-06 17:55:19,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552789888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:19,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009725369] [2021-12-06 17:55:19,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:55:19,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:19,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:19,702 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:19,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-06 17:55:19,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:55:19,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:19,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-06 17:55:19,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:21,057 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 17 treesize of output 13 [2021-12-06 17:55:21,156 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-12-06 17:55:21,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:25,590 INFO L354 Elim1Store]: treesize reduction 115, result has 41.0 percent of original size [2021-12-06 17:55:25,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 78 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 123 treesize of output 137 [2021-12-06 17:55:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 39 proven. 481 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:55:26,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:27,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:55:27,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:55:27,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 78 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 784 treesize of output 708 [2021-12-06 17:55:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 195 proven. 325 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:55:39,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009725369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:39,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:39,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 47] total 115 [2021-12-06 17:55:39,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189207469] [2021-12-06 17:55:39,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:39,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-12-06 17:55:39,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:39,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-12-06 17:55:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=12054, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 17:55:39,602 INFO L87 Difference]: Start difference. First operand 1180 states and 1284 transitions. Second operand has 115 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:56:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:40,130 INFO L93 Difference]: Finished difference Result 3701 states and 3906 transitions. [2021-12-06 17:56:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2021-12-06 17:56:40,130 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-06 17:56:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:40,134 INFO L225 Difference]: With dead ends: 3701 [2021-12-06 17:56:40,134 INFO L226 Difference]: Without dead ends: 3609 [2021-12-06 17:56:40,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28813 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=7923, Invalid=74733, Unknown=0, NotChecked=0, Total=82656 [2021-12-06 17:56:40,137 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1341 mSDsluCounter, 2847 mSDsCounter, 0 mSdLazyCounter, 5788 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 2922 SdHoareTripleChecker+Invalid, 8782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 5788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2574 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:40,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 2922 Invalid, 8782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 5788 Invalid, 0 Unknown, 2574 Unchecked, 5.1s Time] [2021-12-06 17:56:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-12-06 17:56:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 1234. [2021-12-06 17:56:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1230 states have (on average 1.0926829268292684) internal successors, (1344), 1233 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:56:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1344 transitions. [2021-12-06 17:56:40,152 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1344 transitions. Word has length 94 [2021-12-06 17:56:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:40,153 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1344 transitions. [2021-12-06 17:56:40,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:56:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1344 transitions. [2021-12-06 17:56:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 17:56:40,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:40,154 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:40,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-06 17:56:40,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:40,355 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 17:56:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -317303577, now seen corresponding path program 5 times [2021-12-06 17:56:40,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:40,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099055259] [2021-12-06 17:56:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:40,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 64 proven. 232 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:56:42,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:42,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099055259] [2021-12-06 17:56:42,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099055259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:42,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451858021] [2021-12-06 17:56:42,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:56:42,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:42,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:42,083 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:42,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366941e4-02f1-4619-91c1-69e48c45cd91/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-06 17:56:42,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 17:56:42,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:56:42,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-06 17:56:42,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:42,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:56:43,294 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 17 treesize of output 13 [2021-12-06 17:56:43,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22