./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapsum5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/mapsum5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 547252845d807a057f585b63b3488b50cdb63f4784535b1d9fe87f3af67ef42c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:09:41,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:09:41,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:09:41,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:09:41,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:09:41,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:09:41,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:09:41,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:09:41,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:09:41,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:09:41,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:09:41,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:09:41,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:09:41,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:09:41,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:09:41,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:09:41,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:09:41,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:09:41,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:09:41,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:09:41,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:09:41,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:09:41,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:09:41,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:09:41,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:09:41,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:09:41,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:09:41,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:09:41,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:09:41,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:09:41,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:09:41,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:09:41,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:09:41,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:09:41,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:09:41,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:09:41,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:09:41,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:09:41,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:09:41,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:09:41,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:09:41,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:09:42,003 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:09:42,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:09:42,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:09:42,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:09:42,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:09:42,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:09:42,006 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:09:42,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:09:42,007 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:09:42,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:09:42,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:09:42,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:09:42,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:09:42,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:09:42,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:09:42,008 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:09:42,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:09:42,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:09:42,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:09:42,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:09:42,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:09:42,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:09:42,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:09:42,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:09:42,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:09:42,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:09:42,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:09:42,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:09:42,012 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:09:42,012 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:09:42,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:09:42,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:09:42,012 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_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 547252845d807a057f585b63b3488b50cdb63f4784535b1d9fe87f3af67ef42c [2021-11-02 22:09:42,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:09:42,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:09:42,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:09:42,377 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:09:42,378 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:09:42,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-crafted/mapsum5.i [2021-11-02 22:09:42,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/data/46ff88558/865a10bf10d24f08a35bf7c31b66f793/FLAG05e7034a1 [2021-11-02 22:09:43,043 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:09:43,043 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/sv-benchmarks/c/array-crafted/mapsum5.i [2021-11-02 22:09:43,051 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/data/46ff88558/865a10bf10d24f08a35bf7c31b66f793/FLAG05e7034a1 [2021-11-02 22:09:43,367 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/data/46ff88558/865a10bf10d24f08a35bf7c31b66f793 [2021-11-02 22:09:43,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:09:43,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:09:43,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:09:43,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:09:43,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:09:43,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438638f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43, skipping insertion in model container [2021-11-02 22:09:43,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:09:43,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:09:43,661 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/sv-benchmarks/c/array-crafted/mapsum5.i[1380,1393] [2021-11-02 22:09:43,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:09:43,673 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:09:43,697 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/sv-benchmarks/c/array-crafted/mapsum5.i[1380,1393] [2021-11-02 22:09:43,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:09:43,713 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:09:43,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43 WrapperNode [2021-11-02 22:09:43,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:09:43,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:09:43,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:09:43,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:09:43,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:09:43,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:09:43,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:09:43,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:09:43,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:09:43,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:09:43,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:09:43,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:09:43,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (1/1) ... [2021-11-02 22:09:43,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:09:43,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:43,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:09:43,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:09:43,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:09:43,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:09:43,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:09:43,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:09:43,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:09:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:09:43,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:09:44,196 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:09:44,196 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-02 22:09:44,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:09:44 BoogieIcfgContainer [2021-11-02 22:09:44,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:09:44,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:09:44,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:09:44,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:09:44,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:09:43" (1/3) ... [2021-11-02 22:09:44,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433b111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:09:44, skipping insertion in model container [2021-11-02 22:09:44,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:43" (2/3) ... [2021-11-02 22:09:44,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433b111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:09:44, skipping insertion in model container [2021-11-02 22:09:44,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:09:44" (3/3) ... [2021-11-02 22:09:44,214 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum5.i [2021-11-02 22:09:44,220 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:09:44,220 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:09:44,296 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:09:44,316 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:09:44,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:09:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:44,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:09:44,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:44,340 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:44,340 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:44,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-11-02 22:09:44,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:44,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993523733] [2021-11-02 22:09:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:44,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:44,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:44,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993523733] [2021-11-02 22:09:44,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993523733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:44,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:44,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:09:44,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268648241] [2021-11-02 22:09:44,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:09:44,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:44,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:09:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:09:44,589 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 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 2 states, 2 states have (on average 9.0) internal successors, (18), 2 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) [2021-11-02 22:09:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:44,607 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-11-02 22:09:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:09:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 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 [2021-11-02 22:09:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:44,618 INFO L225 Difference]: With dead ends: 53 [2021-11-02 22:09:44,619 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 22:09:44,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:09:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 22:09:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-02 22:09:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-02 22:09:44,660 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-11-02 22:09:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:44,661 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-02 22:09:44,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 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) [2021-11-02 22:09:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-02 22:09:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:09:44,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:44,664 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:44,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:09:44,665 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:44,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:44,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-11-02 22:09:44,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:44,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427291184] [2021-11-02 22:09:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:44,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:44,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:44,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427291184] [2021-11-02 22:09:44,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427291184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:44,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:44,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:44,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780833043] [2021-11-02 22:09:44,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:44,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:44,847 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-11-02 22:09:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:44,909 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-11-02 22:09:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:09:44,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 [2021-11-02 22:09:44,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:44,912 INFO L225 Difference]: With dead ends: 45 [2021-11-02 22:09:44,912 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 22:09:44,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 22:09:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-02 22:09:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-02 22:09:44,920 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-11-02 22:09:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:44,920 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-02 22:09:44,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-11-02 22:09:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-02 22:09:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:09:44,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:44,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:44,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:09:44,947 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 2143387046, now seen corresponding path program 1 times [2021-11-02 22:09:44,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:44,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919966402] [2021-11-02 22:09:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:44,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:09:45,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:45,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919966402] [2021-11-02 22:09:45,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919966402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:45,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:45,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:09:45,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213826181] [2021-11-02 22:09:45,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:09:45,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:09:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:45,060 INFO L87 Difference]: Start difference. First operand 25 states and 29 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) [2021-11-02 22:09:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:45,115 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-11-02 22:09:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:45,116 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 [2021-11-02 22:09:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:45,117 INFO L225 Difference]: With dead ends: 47 [2021-11-02 22:09:45,117 INFO L226 Difference]: Without dead ends: 31 [2021-11-02 22:09:45,118 INFO L786 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 [2021-11-02 22:09:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-02 22:09:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-11-02 22:09:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-02 22:09:45,124 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2021-11-02 22:09:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:45,125 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-02 22:09:45,125 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) [2021-11-02 22:09:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-02 22:09:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:09:45,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:45,127 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:45,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:09:45,127 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash 46775620, now seen corresponding path program 1 times [2021-11-02 22:09:45,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:45,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422346549] [2021-11-02 22:09:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:45,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:09:45,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:45,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422346549] [2021-11-02 22:09:45,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422346549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:45,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:45,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:09:45,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073241065] [2021-11-02 22:09:45,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:09:45,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:45,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:09:45,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:45,262 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:45,332 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-02 22:09:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-11-02 22:09:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:45,336 INFO L225 Difference]: With dead ends: 39 [2021-11-02 22:09:45,336 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 22:09:45,336 INFO L786 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 [2021-11-02 22:09:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 22:09:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-02 22:09:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-02 22:09:45,346 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2021-11-02 22:09:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:45,346 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-02 22:09:45,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-02 22:09:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:09:45,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:45,349 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:45,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:09:45,351 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash -548779230, now seen corresponding path program 1 times [2021-11-02 22:09:45,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:45,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118872656] [2021-11-02 22:09:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:45,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:09:45,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:45,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118872656] [2021-11-02 22:09:45,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118872656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:45,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978224998] [2021-11-02 22:09:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:45,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:45,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:45,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:45,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:09:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:45,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:09:45,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:09:45,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978224998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:45,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:45,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 22:09:45,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138693926] [2021-11-02 22:09:45,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:09:45,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:45,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:09:45,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:09:45,775 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:45,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:45,844 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-11-02 22:09:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:09:45,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-11-02 22:09:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:45,847 INFO L225 Difference]: With dead ends: 55 [2021-11-02 22:09:45,847 INFO L226 Difference]: Without dead ends: 32 [2021-11-02 22:09:45,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:09:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-02 22:09:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-02 22:09:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-02 22:09:45,863 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2021-11-02 22:09:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:45,864 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-02 22:09:45,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-02 22:09:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:09:45,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:45,865 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:45,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:09:46,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:46,097 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:46,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 2 times [2021-11-02 22:09:46,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:46,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554462813] [2021-11-02 22:09:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:46,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:09:46,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:46,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554462813] [2021-11-02 22:09:46,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554462813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:46,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161078209] [2021-11-02 22:09:46,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:09:46,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:46,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:46,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:46,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:09:46,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:09:46,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:09:46,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:09:46,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:09:46,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161078209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:46,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:46,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-02 22:09:46,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860466598] [2021-11-02 22:09:46,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:09:46,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:09:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:09:46,482 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:46,570 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-11-02 22:09:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:09:46,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-11-02 22:09:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:46,574 INFO L225 Difference]: With dead ends: 59 [2021-11-02 22:09:46,574 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 22:09:46,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:09:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 22:09:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-11-02 22:09:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-02 22:09:46,585 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2021-11-02 22:09:46,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:46,586 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-02 22:09:46,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:46,587 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-02 22:09:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:09:46,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:46,591 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:09:46,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:09:46,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:46,817 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash 509646686, now seen corresponding path program 3 times [2021-11-02 22:09:46,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:46,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880929496] [2021-11-02 22:09:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:46,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:53,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:53,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880929496] [2021-11-02 22:09:53,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880929496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:53,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364859008] [2021-11-02 22:09:53,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:09:53,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:53,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:53,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:53,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:09:54,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:09:54,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:09:54,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-02 22:09:54,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:54,587 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 24 treesize of output 20 [2021-11-02 22:09:54,811 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-11-02 22:09:54,811 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 40 treesize of output 41 [2021-11-02 22:09:56,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:09:57,016 INFO L354 Elim1Store]: treesize reduction 220, result has 3.1 percent of original size [2021-11-02 22:09:57,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 168 treesize of output 92 [2021-11-02 22:09:59,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:09:59,626 INFO L354 Elim1Store]: treesize reduction 63, result has 4.5 percent of original size [2021-11-02 22:09:59,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 177 treesize of output 99 [2021-11-02 22:10:00,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:10:00,760 INFO L354 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2021-11-02 22:10:00,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 208 treesize of output 183 [2021-11-02 22:10:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:10:02,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:10:02,293 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 227 treesize of output 145 [2021-11-02 22:10:54,978 WARN L207 SmtUtils]: Spent 7.31 s on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2021-11-02 22:11:07,635 WARN L207 SmtUtils]: Spent 5.02 s on a formula simplification that was a NOOP. DAG size: 94 [2021-11-02 22:11:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:11:07,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364859008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:11:07,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:11:07,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 33] total 58 [2021-11-02 22:11:07,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600919204] [2021-11-02 22:11:07,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-02 22:11:07,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:11:07,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-02 22:11:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=3025, Unknown=2, NotChecked=0, Total=3306 [2021-11-02 22:11:07,931 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 58 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:11:52,606 WARN L207 SmtUtils]: Spent 31.61 s on a formula simplification. DAG size of input: 333 DAG size of output: 155 [2021-11-02 22:12:24,437 WARN L207 SmtUtils]: Spent 24.60 s on a formula simplification. DAG size of input: 263 DAG size of output: 151 [2021-11-02 22:13:30,423 WARN L207 SmtUtils]: Spent 39.11 s on a formula simplification. DAG size of input: 305 DAG size of output: 167 [2021-11-02 22:15:21,069 WARN L207 SmtUtils]: Spent 1.72 m on a formula simplification. DAG size of input: 355 DAG size of output: 218 [2021-11-02 22:15:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:21,205 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2021-11-02 22:15:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:15:21,206 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 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 36 [2021-11-02 22:15:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:21,208 INFO L225 Difference]: With dead ends: 97 [2021-11-02 22:15:21,208 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 22:15:21,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 259.3s TimeCoverageRelationStatistics Valid=741, Invalid=6397, Unknown=2, NotChecked=0, Total=7140 [2021-11-02 22:15:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 22:15:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2021-11-02 22:15:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 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) [2021-11-02 22:15:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-11-02 22:15:21,232 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 36 [2021-11-02 22:15:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:21,232 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-11-02 22:15:21,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-11-02 22:15:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:15:21,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:21,234 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:15:21,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:15:21,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:21,440 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1795298940, now seen corresponding path program 4 times [2021-11-02 22:15:21,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:21,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070297649] [2021-11-02 22:15:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:21,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:15:21,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:21,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070297649] [2021-11-02 22:15:21,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070297649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:21,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151118917] [2021-11-02 22:15:21,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:15:21,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:21,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:21,542 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:21,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:15:21,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:15:21,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:15:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:15:21,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:15:22,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151118917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:22,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:22,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-02 22:15:22,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032821423] [2021-11-02 22:15:22,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:15:22,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:15:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:15:22,052 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) 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) [2021-11-02 22:15:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:22,245 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2021-11-02 22:15:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:15:22,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) 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 38 [2021-11-02 22:15:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:22,247 INFO L225 Difference]: With dead ends: 89 [2021-11-02 22:15:22,247 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 22:15:22,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:15:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 22:15:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-02 22:15:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 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) [2021-11-02 22:15:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-02 22:15:22,259 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 38 [2021-11-02 22:15:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:22,259 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-02 22:15:22,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) 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) [2021-11-02 22:15:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-02 22:15:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:15:22,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:22,261 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:15:22,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:15:22,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:22,485 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:22,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:22,485 INFO L85 PathProgramCache]: Analyzing trace with hash 248734332, now seen corresponding path program 5 times [2021-11-02 22:15:22,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:22,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896003872] [2021-11-02 22:15:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:22,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:15:22,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:22,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896003872] [2021-11-02 22:15:22,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896003872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:22,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447245621] [2021-11-02 22:15:22,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:15:22,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:22,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:22,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:15:23,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 22:15:23,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:15:23,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:15:23,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:15:23,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447245621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:23,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:23,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-02 22:15:23,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71446726] [2021-11-02 22:15:23,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:15:23,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:15:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:15:23,189 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:23,392 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2021-11-02 22:15:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:15:23,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2021-11-02 22:15:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:23,394 INFO L225 Difference]: With dead ends: 71 [2021-11-02 22:15:23,394 INFO L226 Difference]: Without dead ends: 48 [2021-11-02 22:15:23,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:15:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-02 22:15:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-11-02 22:15:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-02 22:15:23,407 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 38 [2021-11-02 22:15:23,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:23,408 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-02 22:15:23,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-02 22:15:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:15:23,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:23,410 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:23,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-02 22:15:23,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:23,625 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash 63072410, now seen corresponding path program 6 times [2021-11-02 22:15:23,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:23,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040966095] [2021-11-02 22:15:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:23,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:15:23,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:23,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040966095] [2021-11-02 22:15:23,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040966095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:23,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221162255] [2021-11-02 22:15:23,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:15:23,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:23,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:23,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:23,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:15:24,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 22:15:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:15:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:15:24,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:15:24,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221162255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:24,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:24,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-02 22:15:24,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398012869] [2021-11-02 22:15:24,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:15:24,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:15:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:15:24,384 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 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) [2021-11-02 22:15:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:24,552 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-11-02 22:15:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:15:24,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 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) Word has length 44 [2021-11-02 22:15:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:24,553 INFO L225 Difference]: With dead ends: 61 [2021-11-02 22:15:24,553 INFO L226 Difference]: Without dead ends: 48 [2021-11-02 22:15:24,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:15:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-02 22:15:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-02 22:15:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 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) [2021-11-02 22:15:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-02 22:15:24,567 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 44 [2021-11-02 22:15:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:24,567 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-02 22:15:24,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 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) [2021-11-02 22:15:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-02 22:15:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:15:24,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:24,569 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:24,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:15:24,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:15:24,791 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:24,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:24,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1985173752, now seen corresponding path program 7 times [2021-11-02 22:15:24,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:24,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451207002] [2021-11-02 22:15:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:24,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:15:31,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:31,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451207002] [2021-11-02 22:15:31,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451207002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:31,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655322102] [2021-11-02 22:15:31,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:15:31,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:31,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:31,117 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:31,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:15:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:32,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-02 22:15:32,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:32,092 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 24 treesize of output 20 [2021-11-02 22:15:32,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:32,227 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 50 treesize of output 40 [2021-11-02 22:15:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:32,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:32,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:32,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:15:32,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 52 [2021-11-02 22:15:34,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:34,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:34,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:34,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 91 [2021-11-02 22:15:36,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:36,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:36,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:36,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:15:36,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:36,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:15:36,890 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-02 22:15:36,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 246 treesize of output 138 [2021-11-02 22:15:37,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:37,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:37,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:15:37,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:15:37,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 207 treesize of output 107 [2021-11-02 22:15:38,258 INFO L354 Elim1Store]: treesize reduction 79, result has 16.0 percent of original size [2021-11-02 22:15:38,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 121 [2021-11-02 22:15:40,598 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-02 22:15:40,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 103 [2021-11-02 22:15:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:15:41,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655322102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:41,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:41,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-11-02 22:15:41,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487246500] [2021-11-02 22:15:41,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-02 22:15:41,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-02 22:15:41,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=4533, Unknown=0, NotChecked=0, Total=4830 [2021-11-02 22:15:41,447 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 70 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:02,075 INFO L93 Difference]: Finished difference Result 166 states and 183 transitions. [2021-11-02 22:16:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-02 22:16:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 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 [2021-11-02 22:16:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:02,077 INFO L225 Difference]: With dead ends: 166 [2021-11-02 22:16:02,077 INFO L226 Difference]: Without dead ends: 158 [2021-11-02 22:16:02,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=1568, Invalid=19312, Unknown=0, NotChecked=0, Total=20880 [2021-11-02 22:16:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-02 22:16:02,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 68. [2021-11-02 22:16:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2021-11-02 22:16:02,113 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 46 [2021-11-02 22:16:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:02,114 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2021-11-02 22:16:02,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:02,114 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2021-11-02 22:16:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:16:02,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:02,115 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:02,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-02 22:16:02,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:02,321 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:16:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1857365610, now seen corresponding path program 8 times [2021-11-02 22:16:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:02,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388373594] [2021-11-02 22:16:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:02,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:16:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 22:16:02,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:02,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388373594] [2021-11-02 22:16:02,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388373594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:02,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252591007] [2021-11-02 22:16:02,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:16:02,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:02,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:02,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:02,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:16:02,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:16:02,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:16:02,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:16:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 22:16:03,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252591007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:03,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:16:03,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-02 22:16:03,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596891128] [2021-11-02 22:16:03,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:16:03,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:03,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:16:03,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:16:03,115 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:03,328 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2021-11-02 22:16:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:16:03,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2021-11-02 22:16:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:03,330 INFO L225 Difference]: With dead ends: 134 [2021-11-02 22:16:03,331 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 22:16:03,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:16:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 22:16:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-11-02 22:16:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2021-11-02 22:16:03,354 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 48 [2021-11-02 22:16:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:03,355 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2021-11-02 22:16:03,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2021-11-02 22:16:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:16:03,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:03,356 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:03,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:16:03,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:03,577 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:16:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1077929908, now seen corresponding path program 9 times [2021-11-02 22:16:03,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:03,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594019891] [2021-11-02 22:16:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:03,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:16:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 22:16:03,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:03,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594019891] [2021-11-02 22:16:03,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594019891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:03,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47550543] [2021-11-02 22:16:03,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:16:03,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:03,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:03,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:03,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:16:04,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 22:16:04,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:16:04,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:16:04,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-02 22:16:04,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47550543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:04,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:16:04,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-11-02 22:16:04,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046807092] [2021-11-02 22:16:04,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:16:04,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:16:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:16:04,531 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:04,745 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2021-11-02 22:16:04,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:16:04,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2021-11-02 22:16:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:04,746 INFO L225 Difference]: With dead ends: 99 [2021-11-02 22:16:04,746 INFO L226 Difference]: Without dead ends: 58 [2021-11-02 22:16:04,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:16:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-02 22:16:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-11-02 22:16:04,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 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) [2021-11-02 22:16:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-11-02 22:16:04,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 50 [2021-11-02 22:16:04,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:04,759 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-11-02 22:16:04,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-11-02 22:16:04,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:16:04,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:04,761 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:04,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-02 22:16:04,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:04,977 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:16:04,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:04,977 INFO L85 PathProgramCache]: Analyzing trace with hash 180167186, now seen corresponding path program 10 times [2021-11-02 22:16:04,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:04,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330398299] [2021-11-02 22:16:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:04,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:16:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:16:14,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:14,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330398299] [2021-11-02 22:16:14,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330398299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:14,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587241065] [2021-11-02 22:16:14,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:16:14,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:14,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:14,727 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:14,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:16:15,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:16:15,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:16:15,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-02 22:16:15,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:16,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:16:17,263 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 0 case distinctions, treesize of input 697 treesize of output 546 [2021-11-02 22:16:17,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:17,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:17,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:17,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:17,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:17,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 378 treesize of output 159 [2021-11-02 22:16:23,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:23,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:23,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:23,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:23,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:23,616 INFO L354 Elim1Store]: treesize reduction 133, result has 33.2 percent of original size [2021-11-02 22:16:23,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 101 treesize of output 115 [2021-11-02 22:16:24,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:24,375 INFO L354 Elim1Store]: treesize reduction 168, result has 34.6 percent of original size [2021-11-02 22:16:24,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 110 treesize of output 176 [2021-11-02 22:16:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:16:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:16:25,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:16:25,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:25,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:16:25,936 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-02 22:16:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 178 treesize of output 175 [2021-11-02 22:16:27,152 INFO L354 Elim1Store]: treesize reduction 250, result has 12.3 percent of original size [2021-11-02 22:16:27,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 74 treesize of output 70 [2021-11-02 22:16:28,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:28,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 32 [2021-11-02 22:16:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:16:28,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587241065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:28,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:16:28,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 82 [2021-11-02 22:16:28,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419584852] [2021-11-02 22:16:28,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-02 22:16:28,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-02 22:16:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=6199, Unknown=0, NotChecked=0, Total=6642 [2021-11-02 22:16:28,836 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 82 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 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) [2021-11-02 22:17:16,549 WARN L207 SmtUtils]: Spent 10.92 s on a formula simplification. DAG size of input: 185 DAG size of output: 122 [2021-11-02 22:17:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:16,738 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2021-11-02 22:17:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-02 22:17:16,738 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 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 56 [2021-11-02 22:17:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:16,740 INFO L225 Difference]: With dead ends: 161 [2021-11-02 22:17:16,740 INFO L226 Difference]: Without dead ends: 156 [2021-11-02 22:17:16,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 13 SyntacticMatches, 8 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4588 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=1258, Invalid=14998, Unknown=0, NotChecked=0, Total=16256 [2021-11-02 22:17:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-02 22:17:16,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2021-11-02 22:17:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-11-02 22:17:16,789 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 56 [2021-11-02 22:17:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:16,790 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-11-02 22:17:16,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 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) [2021-11-02 22:17:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-11-02 22:17:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:17:16,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:16,793 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:16,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:17:16,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:17,001 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1301887952, now seen corresponding path program 11 times [2021-11-02 22:17:17,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:17,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215511944] [2021-11-02 22:17:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:17,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-02 22:17:17,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:17,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215511944] [2021-11-02 22:17:17,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215511944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:17,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129523986] [2021-11-02 22:17:17,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:17:17,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:17,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:17,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:17,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:17:17,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 22:17:17,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:17:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:17:17,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-02 22:17:18,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129523986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:18,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:17:18,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-02 22:17:18,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165411028] [2021-11-02 22:17:18,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:17:18,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:17:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:17:18,095 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 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) [2021-11-02 22:17:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:18,485 INFO L93 Difference]: Finished difference Result 196 states and 212 transitions. [2021-11-02 22:17:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:17:18,486 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 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 58 [2021-11-02 22:17:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:18,487 INFO L225 Difference]: With dead ends: 196 [2021-11-02 22:17:18,488 INFO L226 Difference]: Without dead ends: 119 [2021-11-02 22:17:18,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:17:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-02 22:17:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-11-02 22:17:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 92 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-11-02 22:17:18,519 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 58 [2021-11-02 22:17:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:18,519 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-11-02 22:17:18,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 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) [2021-11-02 22:17:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-11-02 22:17:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:17:18,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:18,521 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:18,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:17:18,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:18,729 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:18,729 INFO L85 PathProgramCache]: Analyzing trace with hash 315175472, now seen corresponding path program 12 times [2021-11-02 22:17:18,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:18,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868196271] [2021-11-02 22:17:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:18,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-02 22:17:18,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:18,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868196271] [2021-11-02 22:17:18,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868196271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:18,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295117399] [2021-11-02 22:17:18,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:17:18,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:18,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:18,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:18,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:17:19,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 22:17:19,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:17:19,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:17:19,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-02 22:17:20,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295117399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:20,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:17:20,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-02 22:17:20,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153420241] [2021-11-02 22:17:20,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:17:20,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:17:20,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:17:20,004 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:20,262 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2021-11-02 22:17:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:17:20,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 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 [2021-11-02 22:17:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:20,263 INFO L225 Difference]: With dead ends: 103 [2021-11-02 22:17:20,263 INFO L226 Difference]: Without dead ends: 68 [2021-11-02 22:17:20,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:17:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-02 22:17:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-11-02 22:17:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:20,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-11-02 22:17:20,281 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 58 [2021-11-02 22:17:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:20,281 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-11-02 22:17:20,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-11-02 22:17:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:17:20,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:20,282 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:20,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:17:20,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:17:20,488 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1848303794, now seen corresponding path program 13 times [2021-11-02 22:17:20,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:20,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242654609] [2021-11-02 22:17:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:20,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-02 22:17:20,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:20,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242654609] [2021-11-02 22:17:20,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242654609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:20,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150262326] [2021-11-02 22:17:20,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:17:20,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:20,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:20,641 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:20,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:17:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:21,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:17:21,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-02 22:17:21,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150262326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:21,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:17:21,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-11-02 22:17:21,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339010660] [2021-11-02 22:17:21,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:17:21,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:17:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:17:21,778 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-11-02 22:17:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:21,973 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-02 22:17:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:17:21,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 64 [2021-11-02 22:17:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:21,974 INFO L225 Difference]: With dead ends: 85 [2021-11-02 22:17:21,975 INFO L226 Difference]: Without dead ends: 68 [2021-11-02 22:17:21,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:17:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-02 22:17:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-02 22:17:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 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) [2021-11-02 22:17:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-11-02 22:17:21,990 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 64 [2021-11-02 22:17:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:21,990 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-11-02 22:17:21,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-11-02 22:17:21,991 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-11-02 22:17:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:17:21,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:21,992 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:22,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:17:22,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:17:22,195 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2110713172, now seen corresponding path program 14 times [2021-11-02 22:17:22,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:22,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166326829] [2021-11-02 22:17:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:22,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:17:38,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:38,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166326829] [2021-11-02 22:17:38,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166326829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:38,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494182750] [2021-11-02 22:17:38,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:17:38,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:38,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:38,241 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:38,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:17:39,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:17:39,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:17:39,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 155 conjunts are in the unsatisfiable core [2021-11-02 22:17:39,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:39,641 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 24 treesize of output 20 [2021-11-02 22:17:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:39,820 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 40 treesize of output 35 [2021-11-02 22:17:40,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:17:40,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 55 [2021-11-02 22:17:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:17:40,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 69 [2021-11-02 22:17:40,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:40,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:17:40,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 86 [2021-11-02 22:17:44,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:44,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:44,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:44,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:44,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:44,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:44,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:44,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:44,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:44,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 284 treesize of output 133 [2021-11-02 22:17:50,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:17:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:17:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:50,143 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-02 22:17:50,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 330 treesize of output 172 [2021-11-02 22:17:51,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:17:51,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:17:51,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:51,217 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-02 22:17:51,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 300 treesize of output 164 [2021-11-02 22:17:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:17:52,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:17:52,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:52,200 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-02 22:17:52,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 288 treesize of output 164 [2021-11-02 22:17:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:53,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:53,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:53,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:17:53,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:17:53,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 283 treesize of output 141 [2021-11-02 22:17:53,920 INFO L354 Elim1Store]: treesize reduction 127, result has 18.6 percent of original size [2021-11-02 22:17:53,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 247 treesize of output 151 [2021-11-02 22:17:59,055 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-11-02 22:17:59,056 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 306 treesize of output 121 [2021-11-02 22:18:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:18:00,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494182750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:18:00,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:18:00,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 56] total 108 [2021-11-02 22:18:00,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004064240] [2021-11-02 22:18:00,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-02 22:18:00,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:18:00,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-02 22:18:00,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=11021, Unknown=0, NotChecked=0, Total=11556 [2021-11-02 22:18:00,125 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 108 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 108 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) [2021-11-02 22:18:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:18:51,693 INFO L93 Difference]: Finished difference Result 222 states and 239 transitions. [2021-11-02 22:18:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-02 22:18:51,693 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 108 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 66 [2021-11-02 22:18:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:18:51,695 INFO L225 Difference]: With dead ends: 222 [2021-11-02 22:18:51,695 INFO L226 Difference]: Without dead ends: 214 [2021-11-02 22:18:51,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14725 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=2476, Invalid=45266, Unknown=0, NotChecked=0, Total=47742 [2021-11-02 22:18:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-02 22:18:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 96. [2021-11-02 22:18:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-11-02 22:18:51,738 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 66 [2021-11-02 22:18:51,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:18:51,738 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-11-02 22:18:51,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 108 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) [2021-11-02 22:18:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-11-02 22:18:51,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:18:51,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:18:51,739 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:18:51,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:18:51,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:18:51,940 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:18:51,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:18:51,940 INFO L85 PathProgramCache]: Analyzing trace with hash 480310858, now seen corresponding path program 15 times [2021-11-02 22:18:51,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:18:51,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028761495] [2021-11-02 22:18:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:18:51,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:18:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:18:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-02 22:18:52,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:18:52,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028761495] [2021-11-02 22:18:52,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028761495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:18:52,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746629651] [2021-11-02 22:18:52,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:18:52,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:18:52,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:18:52,161 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:18:52,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:18:53,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 22:18:53,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:18:53,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:18:53,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:18:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-02 22:18:54,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746629651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:18:54,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:18:54,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-11-02 22:18:54,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388347753] [2021-11-02 22:18:54,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:18:54,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:18:54,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:18:54,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:18:54,068 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 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) [2021-11-02 22:18:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:18:54,821 INFO L93 Difference]: Finished difference Result 225 states and 241 transitions. [2021-11-02 22:18:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 22:18:54,822 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 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) Word has length 68 [2021-11-02 22:18:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:18:54,823 INFO L225 Difference]: With dead ends: 225 [2021-11-02 22:18:54,823 INFO L226 Difference]: Without dead ends: 122 [2021-11-02 22:18:54,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=625, Invalid=2345, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 22:18:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-02 22:18:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2021-11-02 22:18:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.079646017699115) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2021-11-02 22:18:54,873 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 68 [2021-11-02 22:18:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:18:54,873 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2021-11-02 22:18:54,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 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) [2021-11-02 22:18:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2021-11-02 22:18:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:18:54,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:18:54,874 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:18:54,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:18:55,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:18:55,075 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:18:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:18:55,075 INFO L85 PathProgramCache]: Analyzing trace with hash -378270100, now seen corresponding path program 16 times [2021-11-02 22:18:55,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:18:55,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92275646] [2021-11-02 22:18:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:18:55,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:18:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:18:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-02 22:18:55,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:18:55,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92275646] [2021-11-02 22:18:55,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92275646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:18:55,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095381302] [2021-11-02 22:18:55,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:18:55,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:18:55,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:18:55,245 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:18:55,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:18:56,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:18:56,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:18:56,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:18:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:18:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-02 22:18:56,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095381302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:18:56,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:18:56,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-11-02 22:18:56,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33396730] [2021-11-02 22:18:56,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:18:56,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:18:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:18:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:18:56,855 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:57,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:18:57,349 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2021-11-02 22:18:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:18:57,349 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 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 [2021-11-02 22:18:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:18:57,350 INFO L225 Difference]: With dead ends: 165 [2021-11-02 22:18:57,350 INFO L226 Difference]: Without dead ends: 80 [2021-11-02 22:18:57,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:18:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-02 22:18:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-11-02 22:18:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 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) [2021-11-02 22:18:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-11-02 22:18:57,372 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 70 [2021-11-02 22:18:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:18:57,372 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-11-02 22:18:57,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-11-02 22:18:57,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:18:57,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:18:57,373 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:18:57,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:18:57,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:18:57,574 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:18:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:18:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash 733629126, now seen corresponding path program 17 times [2021-11-02 22:18:57,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:18:57,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459576851] [2021-11-02 22:18:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:18:57,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:18:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 9 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:14,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:14,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459576851] [2021-11-02 22:19:14,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459576851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:14,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984135999] [2021-11-02 22:19:14,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:19:14,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:14,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:14,139 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:14,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:19:16,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 22:19:16,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:16,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 163 conjunts are in the unsatisfiable core [2021-11-02 22:19:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:16,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:19:17,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:19:17,141 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:19:17,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:19:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:19,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 216 treesize of output 106 [2021-11-02 22:19:23,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:19:23,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:19:23,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:23,747 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-02 22:19:23,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 363 treesize of output 172 [2021-11-02 22:19:24,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:19:24,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:19:24,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:24,571 INFO L354 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2021-11-02 22:19:24,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 343 treesize of output 175 [2021-11-02 22:19:25,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:19:25,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:19:25,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:25,369 INFO L354 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2021-11-02 22:19:25,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 334 treesize of output 178 [2021-11-02 22:19:26,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:19:26,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:19:26,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,124 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-02 22:19:26,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 329 treesize of output 172 [2021-11-02 22:19:26,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:26,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:19:26,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 149 [2021-11-02 22:19:27,520 INFO L354 Elim1Store]: treesize reduction 108, result has 42.2 percent of original size [2021-11-02 22:19:27,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 260 treesize of output 186 [2021-11-02 22:19:52,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:19:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:52,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:52,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:52,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:19:52,975 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-11-02 22:19:52,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 436 treesize of output 307 [2021-11-02 22:19:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:55,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984135999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:55,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:19:55,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 61] total 121 [2021-11-02 22:19:55,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438295977] [2021-11-02 22:19:55,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-02 22:19:55,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:55,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-02 22:19:55,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=14051, Unknown=1, NotChecked=0, Total=14520 [2021-11-02 22:19:55,581 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 121 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 121 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) [2021-11-02 22:21:57,488 WARN L207 SmtUtils]: Spent 10.16 s on a formula simplification. DAG size of input: 215 DAG size of output: 122 [2021-11-02 22:21:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:57,933 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-11-02 22:21:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-02 22:21:57,935 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 121 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 76 [2021-11-02 22:21:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:57,935 INFO L225 Difference]: With dead ends: 146 [2021-11-02 22:21:57,935 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 22:21:57,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8159 ImplicationChecksByTransitivity, 136.2s TimeCoverageRelationStatistics Valid=1726, Invalid=32682, Unknown=2, NotChecked=0, Total=34410 [2021-11-02 22:21:57,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 22:21:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 110. [2021-11-02 22:21:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.073394495412844) internal successors, (117), 109 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) [2021-11-02 22:21:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2021-11-02 22:21:57,975 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 76 [2021-11-02 22:21:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:57,976 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2021-11-02 22:21:57,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 121 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) [2021-11-02 22:21:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2021-11-02 22:21:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 22:21:57,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:57,977 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:57,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:58,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:58,181 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:58,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2000908316, now seen corresponding path program 18 times [2021-11-02 22:21:58,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:58,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466499074] [2021-11-02 22:21:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:58,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-02 22:21:58,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:58,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466499074] [2021-11-02 22:21:58,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466499074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:58,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132775829] [2021-11-02 22:21:58,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:21:58,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:58,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:58,425 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:58,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:22:00,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 22:22:00,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:22:00,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:22:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-02 22:22:01,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132775829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:01,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:22:01,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-11-02 22:22:01,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101816413] [2021-11-02 22:22:01,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:22:01,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:01,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:22:01,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:22:01,026 INFO L87 Difference]: Start difference. First operand 110 states and 117 transitions. Second operand has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 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) [2021-11-02 22:22:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:02,528 INFO L93 Difference]: Finished difference Result 244 states and 260 transitions. [2021-11-02 22:22:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 22:22:02,531 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 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 78 [2021-11-02 22:22:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:02,532 INFO L225 Difference]: With dead ends: 244 [2021-11-02 22:22:02,532 INFO L226 Difference]: Without dead ends: 138 [2021-11-02 22:22:02,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=930, Invalid=4326, Unknown=0, NotChecked=0, Total=5256 [2021-11-02 22:22:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-02 22:22:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2021-11-02 22:22:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.069767441860465) internal successors, (138), 129 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2021-11-02 22:22:02,596 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 78 [2021-11-02 22:22:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:02,596 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2021-11-02 22:22:02,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 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) [2021-11-02 22:22:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2021-11-02 22:22:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:22:02,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:02,597 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:02,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:22:02,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 22:22:02,798 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash -693778298, now seen corresponding path program 19 times [2021-11-02 22:22:02,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:02,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824604974] [2021-11-02 22:22:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:02,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-02 22:22:03,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:03,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824604974] [2021-11-02 22:22:03,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824604974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:03,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764313720] [2021-11-02 22:22:03,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:22:03,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:03,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:03,026 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:03,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:22:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:04,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:22:04,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-02 22:22:04,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764313720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:04,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:22:04,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-02 22:22:04,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494885738] [2021-11-02 22:22:04,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:22:04,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:22:04,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:22:04,818 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:05,171 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2021-11-02 22:22:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:22:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2021-11-02 22:22:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:05,172 INFO L225 Difference]: With dead ends: 187 [2021-11-02 22:22:05,173 INFO L226 Difference]: Without dead ends: 90 [2021-11-02 22:22:05,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=336, Invalid=786, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:22:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-02 22:22:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-11-02 22:22:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 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) [2021-11-02 22:22:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-11-02 22:22:05,198 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 80 [2021-11-02 22:22:05,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:05,198 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-11-02 22:22:05,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:22:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-11-02 22:22:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 22:22:05,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:05,199 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:05,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:22:05,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:05,408 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2133071264, now seen corresponding path program 20 times [2021-11-02 22:22:05,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:05,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736891528] [2021-11-02 22:22:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:05,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 16 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:22:45,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:45,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736891528] [2021-11-02 22:22:45,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736891528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:45,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766577798] [2021-11-02 22:22:45,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:22:45,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:45,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:45,534 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:45,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86054262-74d9-4fe0-88f0-97b723c6e44e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:22:47,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:22:47,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:22:47,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 177 conjunts are in the unsatisfiable core [2021-11-02 22:22:47,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:48,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:22:48,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:22:48,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:22:48,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:22:48,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:22:55,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:55,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 119 [2021-11-02 22:23:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:23:06,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:23:06,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:23:06,482 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-02 22:23:06,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 462 treesize of output 191