./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.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_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/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_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/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_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/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 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:28:46,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:28:46,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:28:47,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:28:47,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:28:47,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:28:47,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:28:47,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:28:47,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:28:47,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:28:47,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:28:47,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:28:47,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:28:47,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:28:47,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:28:47,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:28:47,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:28:47,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:28:47,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:28:47,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:28:47,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:28:47,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:28:47,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:28:47,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:28:47,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:28:47,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:28:47,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:28:47,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:28:47,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:28:47,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:28:47,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:28:47,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:28:47,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:28:47,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:28:47,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:28:47,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:28:47,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:28:47,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:28:47,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:28:47,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:28:47,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:28:47,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:28:47,138 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:28:47,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:28:47,139 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:28:47,139 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:28:47,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:28:47,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:28:47,142 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:28:47,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:28:47,143 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:28:47,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:28:47,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:28:47,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:28:47,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:28:47,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:28:47,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:28:47,146 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:28:47,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:28:47,154 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:28:47,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:28:47,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:28:47,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:28:47,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:28:47,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:28:47,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:28:47,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:28:47,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:28:47,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:28:47,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:28:47,159 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:28:47,162 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:28:47,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:28:47,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:28:47,163 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_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-11-02 22:28:47,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:28:47,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:28:47,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:28:47,553 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:28:47,556 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:28:47,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-02 22:28:47,634 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/data/670d0a5a4/4fa7465d800f449c8788ce6fb03addce/FLAGa70cac10b [2021-11-02 22:28:48,246 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:28:48,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-02 22:28:48,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/data/670d0a5a4/4fa7465d800f449c8788ce6fb03addce/FLAGa70cac10b [2021-11-02 22:28:48,507 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/data/670d0a5a4/4fa7465d800f449c8788ce6fb03addce [2021-11-02 22:28:48,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:28:48,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:28:48,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:28:48,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:28:48,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:28:48,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:28:48" (1/1) ... [2021-11-02 22:28:48,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c31fb55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:48, skipping insertion in model container [2021-11-02 22:28:48,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:28:48" (1/1) ... [2021-11-02 22:28:48,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:28:48,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:28:48,975 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_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-02 22:28:48,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:28:48,990 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:28:49,036 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_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-02 22:28:49,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:28:49,077 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:28:49,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49 WrapperNode [2021-11-02 22:28:49,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:28:49,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:28:49,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:28:49,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:28:49,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (1/1) ... [2021-11-02 22:28:49,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (1/1) ... [2021-11-02 22:28:49,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:28:49,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:28:49,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:28:49,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:28:49,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (1/1) ... [2021-11-02 22:28:49,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (1/1) ... [2021-11-02 22:28:49,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (1/1) ... [2021-11-02 22:28:49,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (1/1) ... [2021-11-02 22:28:49,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (1/1) ... [2021-11-02 22:28:49,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (1/1) ... [2021-11-02 22:28:49,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (1/1) ... [2021-11-02 22:28:49,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:28:49,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:28:49,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:28:49,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:28:49,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (1/1) ... [2021-11-02 22:28:49,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:28:49,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:49,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:28:49,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:28:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:28:49,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:28:49,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:28:49,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:28:49,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:28:49,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:28:49,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:28:49,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:28:49,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:28:49,576 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:28:49,577 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-02 22:28:49,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:28:49 BoogieIcfgContainer [2021-11-02 22:28:49,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:28:49,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:28:49,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:28:49,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:28:49,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:28:48" (1/3) ... [2021-11-02 22:28:49,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724ef657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:28:49, skipping insertion in model container [2021-11-02 22:28:49,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:49" (2/3) ... [2021-11-02 22:28:49,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724ef657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:28:49, skipping insertion in model container [2021-11-02 22:28:49,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:28:49" (3/3) ... [2021-11-02 22:28:49,605 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-11-02 22:28:49,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:28:49,627 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:28:49,722 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:28:49,730 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 22:28:49,731 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:28:49,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 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 22:28:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-02 22:28:49,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:49,756 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-02 22:28:49,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash 890037006, now seen corresponding path program 1 times [2021-11-02 22:28:49,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:49,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431122093] [2021-11-02 22:28:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:49,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:50,035 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 22:28:50,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:50,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431122093] [2021-11-02 22:28:50,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431122093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:50,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:50,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:28:50,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897188974] [2021-11-02 22:28:50,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:28:50,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:28:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:28:50,085 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 22:28:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:50,106 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2021-11-02 22:28:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:28:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-02 22:28:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:50,119 INFO L225 Difference]: With dead ends: 23 [2021-11-02 22:28:50,121 INFO L226 Difference]: Without dead ends: 11 [2021-11-02 22:28:50,125 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 22:28:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-02 22:28:50,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-02 22:28:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 22:28:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-02 22:28:50,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-02 22:28:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:50,165 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-02 22:28:50,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 22:28:50,166 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-02 22:28:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:28:50,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:50,167 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:50,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:28:50,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1806862075, now seen corresponding path program 1 times [2021-11-02 22:28:50,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:50,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514610434] [2021-11-02 22:28:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:50,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:50,268 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 22:28:50,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:50,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514610434] [2021-11-02 22:28:50,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514610434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:50,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:50,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:28:50,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832177696] [2021-11-02 22:28:50,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:28:50,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:50,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:28:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:50,277 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:50,304 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-02 22:28:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:28:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-02 22:28:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:50,306 INFO L225 Difference]: With dead ends: 21 [2021-11-02 22:28:50,306 INFO L226 Difference]: Without dead ends: 15 [2021-11-02 22:28:50,307 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 22:28:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-02 22:28:50,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-11-02 22:28:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-02 22:28:50,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2021-11-02 22:28:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:50,316 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-02 22:28:50,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-02 22:28:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:28:50,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:50,320 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:50,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:28:50,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:50,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1217762572, now seen corresponding path program 1 times [2021-11-02 22:28:50,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:50,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357723742] [2021-11-02 22:28:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:50,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:50,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:50,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357723742] [2021-11-02 22:28:50,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357723742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:50,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:50,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:28:50,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922319062] [2021-11-02 22:28:50,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:28:50,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:50,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:28:50,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:28:50,497 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 22:28:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:50,534 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-02 22:28:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:28:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-02 22:28:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:50,536 INFO L225 Difference]: With dead ends: 20 [2021-11-02 22:28:50,536 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 22:28:50,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:28:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 22:28:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-11-02 22:28:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 22:28:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-02 22:28:50,541 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-11-02 22:28:50,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:50,542 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-02 22:28:50,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 22:28:50,543 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-02 22:28:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:28:50,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:50,544 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:50,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:28:50,544 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:50,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1228764301, now seen corresponding path program 1 times [2021-11-02 22:28:50,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:50,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628213965] [2021-11-02 22:28:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:50,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:50,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:50,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628213965] [2021-11-02 22:28:50,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628213965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:50,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437247809] [2021-11-02 22:28:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:50,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:50,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:50,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:50,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:28:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:50,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:28:50,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:50,916 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 22:28:50,955 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 22:28:51,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-02 22:28:51,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-02 22:28:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:51,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437247809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:51,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:28:51,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-11-02 22:28:51,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45044215] [2021-11-02 22:28:51,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:28:51,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:28:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:28:51,155 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 22:28:51,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:51,203 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-02 22:28:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:28:51,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 22:28:51,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:51,205 INFO L225 Difference]: With dead ends: 30 [2021-11-02 22:28:51,205 INFO L226 Difference]: Without dead ends: 21 [2021-11-02 22:28:51,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:28:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-02 22:28:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-02 22:28:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 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 22:28:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-02 22:28:51,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2021-11-02 22:28:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:51,211 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-02 22:28:51,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 22:28:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-02 22:28:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:28:51,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:51,213 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:51,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:51,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:51,439 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1718933108, now seen corresponding path program 2 times [2021-11-02 22:28:51,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:51,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419798545] [2021-11-02 22:28:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:51,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:51,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:51,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419798545] [2021-11-02 22:28:51,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419798545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:51,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737160070] [2021-11-02 22:28:51,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:28:51,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:51,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:51,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:51,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:28:51,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:28:51,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:28:51,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:51,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:28:51,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:28:51,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-02 22:28:51,987 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:28:51,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:28:52,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-11-02 22:28:52,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:28:52,078 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:28:52,079 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 1 case distinctions, treesize of input 46 treesize of output 34 [2021-11-02 22:28:52,091 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 22:28:52,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-02 22:28:52,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-02 22:28:52,361 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:28:52,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-02 22:28:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:52,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737160070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:52,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:28:52,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-02 22:28:52,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857524060] [2021-11-02 22:28:52,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:28:52,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:52,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:28:52,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:28:52,384 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:52,806 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-11-02 22:28:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:28:52,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 22:28:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:52,812 INFO L225 Difference]: With dead ends: 27 [2021-11-02 22:28:52,812 INFO L226 Difference]: Without dead ends: 25 [2021-11-02 22:28:52,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:28:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-02 22:28:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-02 22:28:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 22:28:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-02 22:28:52,817 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-11-02 22:28:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:52,818 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-02 22:28:52,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-02 22:28:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:28:52,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:52,822 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-02 22:28:52,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:53,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:53,023 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:53,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash -154052339, now seen corresponding path program 3 times [2021-11-02 22:28:53,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:53,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791624043] [2021-11-02 22:28:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:53,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:53,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:53,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791624043] [2021-11-02 22:28:53,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791624043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:53,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696392182] [2021-11-02 22:28:53,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:28:53,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:53,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:53,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:53,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:28:53,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:28:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:53,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 22:28:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:53,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:28:53,519 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 22:28:53,531 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 22:28:53,608 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:28:53,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:28:53,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:28:53,750 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:28:53,751 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 1 case distinctions, treesize of input 63 treesize of output 66 [2021-11-02 22:28:53,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:28:53,779 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:28:53,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2021-11-02 22:28:54,093 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-02 22:28:54,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-11-02 22:28:54,115 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-02 22:28:54,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-11-02 22:28:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:54,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696392182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:54,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:28:54,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-02 22:28:54,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394335197] [2021-11-02 22:28:54,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:28:54,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:28:54,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:28:54,133 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 22:28:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:54,242 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-11-02 22:28:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:28:54,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 22:28:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:54,245 INFO L225 Difference]: With dead ends: 40 [2021-11-02 22:28:54,245 INFO L226 Difference]: Without dead ends: 28 [2021-11-02 22:28:54,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:28:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-02 22:28:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-11-02 22:28:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-02 22:28:54,251 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2021-11-02 22:28:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:54,252 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-02 22:28:54,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 22:28:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-02 22:28:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:28:54,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:54,253 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-02 22:28:54,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:54,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 22:28:54,479 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:54,480 INFO L85 PathProgramCache]: Analyzing trace with hash -336964282, now seen corresponding path program 4 times [2021-11-02 22:28:54,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:54,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441938430] [2021-11-02 22:28:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:54,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:55,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:55,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441938430] [2021-11-02 22:28:55,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441938430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:55,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096732459] [2021-11-02 22:28:55,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:28:55,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:55,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:55,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:55,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:28:55,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:28:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:55,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 22:28:55,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:55,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:28:55,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:28:55,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-02 22:28:55,418 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:28:55,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:28:55,540 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 52 treesize of output 48 [2021-11-02 22:28:55,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:28:55,556 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:28:55,557 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 1 case distinctions, treesize of input 57 treesize of output 45 [2021-11-02 22:28:55,572 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 22:28:55,692 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-02 22:28:55,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 22:28:55,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:28:55,893 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:28:55,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 107 [2021-11-02 22:28:55,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:28:55,952 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:28:55,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 129 [2021-11-02 22:28:55,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:28:55,978 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:28:55,979 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 1 case distinctions, treesize of input 111 treesize of output 114 [2021-11-02 22:28:56,534 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-11-02 22:28:56,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 70 [2021-11-02 22:28:56,551 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-02 22:28:56,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 51 [2021-11-02 22:28:56,700 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 22:28:56,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-11-02 22:28:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:56,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096732459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:56,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:28:56,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-11-02 22:28:56,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327037161] [2021-11-02 22:28:56,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:28:56,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:28:56,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:28:56,730 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 22:29:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:01,635 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-02 22:29:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:29:01,636 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) Word has length 25 [2021-11-02 22:29:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:01,637 INFO L225 Difference]: With dead ends: 34 [2021-11-02 22:29:01,637 INFO L226 Difference]: Without dead ends: 32 [2021-11-02 22:29:01,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:29:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-02 22:29:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-11-02 22:29:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 22:29:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-02 22:29:01,644 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2021-11-02 22:29:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:01,647 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-02 22:29:01,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 22:29:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-02 22:29:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:29:01,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:01,651 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-02 22:29:01,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:29:01,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 22:29:01,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1159556869, now seen corresponding path program 5 times [2021-11-02 22:29:01,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:01,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081942602] [2021-11-02 22:29:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:01,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:02,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:02,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081942602] [2021-11-02 22:29:02,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081942602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:02,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082221921] [2021-11-02 22:29:02,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:29:02,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:02,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:02,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:29:02,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:29:02,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 22:29:02,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:29:02,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 22:29:02,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:02,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:29:02,708 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 22:29:02,726 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 22:29:02,815 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:29:02,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:29:02,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:02,977 INFO L354 Elim1Store]: treesize reduction 75, result has 10.7 percent of original size [2021-11-02 22:29:02,978 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 1 case distinctions, treesize of input 72 treesize of output 75 [2021-11-02 22:29:03,001 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-02 22:29:03,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2021-11-02 22:29:03,026 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-02 22:29:03,027 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 53 treesize of output 52 [2021-11-02 22:29:03,171 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-02 22:29:03,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 22:29:03,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:03,379 INFO L354 Elim1Store]: treesize reduction 136, result has 13.4 percent of original size [2021-11-02 22:29:03,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 96 [2021-11-02 22:29:03,403 INFO L354 Elim1Store]: treesize reduction 87, result has 16.3 percent of original size [2021-11-02 22:29:03,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 115 [2021-11-02 22:29:03,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:03,440 INFO L354 Elim1Store]: treesize reduction 120, result has 20.5 percent of original size [2021-11-02 22:29:03,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 111 [2021-11-02 22:29:04,119 INFO L354 Elim1Store]: treesize reduction 126, result has 8.0 percent of original size [2021-11-02 22:29:04,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 97 [2021-11-02 22:29:04,163 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-11-02 22:29:04,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 46 [2021-11-02 22:29:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:04,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082221921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:04,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:29:04,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-02 22:29:04,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701199523] [2021-11-02 22:29:04,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:29:04,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:29:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:29:04,188 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:29:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:10,734 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-11-02 22:29:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:29:10,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 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 22:29:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:10,736 INFO L225 Difference]: With dead ends: 50 [2021-11-02 22:29:10,736 INFO L226 Difference]: Without dead ends: 35 [2021-11-02 22:29:10,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:29:10,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-02 22:29:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-11-02 22:29:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-02 22:29:10,743 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-11-02 22:29:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:10,743 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-02 22:29:10,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:29:10,744 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-02 22:29:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:29:10,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:10,745 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2021-11-02 22:29:10,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:29:10,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:10,951 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash 605622946, now seen corresponding path program 6 times [2021-11-02 22:29:10,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:10,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074429157] [2021-11-02 22:29:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:10,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:11,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:11,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074429157] [2021-11-02 22:29:11,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074429157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:11,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979109286] [2021-11-02 22:29:11,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:29:11,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:11,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:11,895 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:29:11,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:29:12,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 22:29:12,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:29:12,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-02 22:29:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:29:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:12,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-02 22:29:12,267 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:29:12,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:29:12,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-11-02 22:29:12,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:12,398 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:29:12,398 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 1 case distinctions, treesize of input 57 treesize of output 45 [2021-11-02 22:29:12,413 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 22:29:12,567 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:29:12,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:29:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:12,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:12,817 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:29:12,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 117 [2021-11-02 22:29:12,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:12,850 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:29:12,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 155 [2021-11-02 22:29:12,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:12,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:12,873 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:29:12,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 140 [2021-11-02 22:29:13,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:13,082 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-11-02 22:29:13,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 41 [2021-11-02 22:29:13,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:13,339 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 22:29:13,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 139 [2021-11-02 22:29:13,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:13,386 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:29:13,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 220 [2021-11-02 22:29:13,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:13,437 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-11-02 22:29:13,437 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 6 case distinctions, treesize of input 207 treesize of output 201 [2021-11-02 22:29:14,479 INFO L354 Elim1Store]: treesize reduction 110, result has 14.7 percent of original size [2021-11-02 22:29:14,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 126 [2021-11-02 22:29:14,516 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-02 22:29:14,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 81 [2021-11-02 22:29:18,714 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-02 22:29:18,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 40 [2021-11-02 22:29:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:18,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979109286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:18,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:29:18,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 27 [2021-11-02 22:29:18,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510054092] [2021-11-02 22:29:18,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:29:18,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:29:18,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=586, Unknown=2, NotChecked=0, Total=702 [2021-11-02 22:29:18,737 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:42,048 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-11-02 22:29:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:29:42,049 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 22:29:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:42,050 INFO L225 Difference]: With dead ends: 41 [2021-11-02 22:29:42,051 INFO L226 Difference]: Without dead ends: 39 [2021-11-02 22:29:42,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=319, Invalid=1235, Unknown=6, NotChecked=0, Total=1560 [2021-11-02 22:29:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-02 22:29:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-11-02 22:29:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:29:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-02 22:29:42,058 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2021-11-02 22:29:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:42,059 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-02 22:29:42,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-02 22:29:42,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:29:42,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:42,061 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-02 22:29:42,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:29:42,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:42,275 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1039628769, now seen corresponding path program 7 times [2021-11-02 22:29:42,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:42,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868737823] [2021-11-02 22:29:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:42,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:43,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:43,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868737823] [2021-11-02 22:29:43,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868737823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:43,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525808609] [2021-11-02 22:29:43,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:29:43,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:43,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:43,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:29:43,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:29:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-02 22:29:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:43,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:29:43,906 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 22:29:43,915 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 22:29:43,983 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:29:43,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:29:44,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:44,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:44,121 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:29:44,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 71 [2021-11-02 22:29:44,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:44,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:44,141 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:29:44,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 67 [2021-11-02 22:29:44,303 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:29:44,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:29:44,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:44,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:44,550 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 22:29:44,551 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 101 [2021-11-02 22:29:44,560 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-02 22:29:44,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 137 [2021-11-02 22:29:44,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:44,586 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:29:44,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 133 [2021-11-02 22:29:44,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:44,791 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-11-02 22:29:44,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 41 [2021-11-02 22:29:44,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:45,016 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-02 22:29:45,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 116 [2021-11-02 22:29:45,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:45,070 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-11-02 22:29:45,070 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 6 case distinctions, treesize of input 183 treesize of output 192 [2021-11-02 22:29:46,313 INFO L354 Elim1Store]: treesize reduction 239, result has 8.4 percent of original size [2021-11-02 22:29:46,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 286 treesize of output 144 [2021-11-02 22:29:46,391 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-11-02 22:29:46,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 67 [2021-11-02 22:29:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:46,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525808609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:46,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:29:46,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 26 [2021-11-02 22:29:46,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909069125] [2021-11-02 22:29:46,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:29:46,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:29:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:29:46,427 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:09,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:09,918 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-02 22:30:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:30:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 22:30:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:09,919 INFO L225 Difference]: With dead ends: 60 [2021-11-02 22:30:09,919 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 22:30:09,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:30:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 22:30:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-11-02 22:30:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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 22:30:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-02 22:30:09,925 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2021-11-02 22:30:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:09,926 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-02 22:30:09,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-02 22:30:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:30:09,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:09,927 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-11-02 22:30:09,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-02 22:30:10,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:30:10,135 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash -342676840, now seen corresponding path program 8 times [2021-11-02 22:30:10,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:10,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200658264] [2021-11-02 22:30:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:10,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:11,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:11,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200658264] [2021-11-02 22:30:11,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200658264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:11,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721966722] [2021-11-02 22:30:11,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:30:11,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:11,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:11,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:30:11,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:30:11,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:30:11,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-02 22:30:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:11,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:30:11,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:11,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-02 22:30:11,803 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:30:11,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:30:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 22:30:11,877 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 52 treesize of output 48 [2021-11-02 22:30:11,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:11,895 INFO L354 Elim1Store]: treesize reduction 109, result has 10.7 percent of original size [2021-11-02 22:30:11,895 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 1 case distinctions, treesize of input 57 treesize of output 45 [2021-11-02 22:30:11,999 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:30:12,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:30:12,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:12,195 INFO L354 Elim1Store]: treesize reduction 75, result has 10.7 percent of original size [2021-11-02 22:30:12,196 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 1 case distinctions, treesize of input 136 treesize of output 121 [2021-11-02 22:30:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:12,229 INFO L354 Elim1Store]: treesize reduction 117, result has 11.4 percent of original size [2021-11-02 22:30:12,230 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 1 case distinctions, treesize of input 162 treesize of output 165 [2021-11-02 22:30:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:12,279 INFO L354 Elim1Store]: treesize reduction 262, result has 14.7 percent of original size [2021-11-02 22:30:12,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 173 [2021-11-02 22:30:12,554 INFO L354 Elim1Store]: treesize reduction 126, result has 37.6 percent of original size [2021-11-02 22:30:12,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 51 treesize of output 93 [2021-11-02 22:30:12,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:12,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:30:12,931 INFO L354 Elim1Store]: treesize reduction 136, result has 13.4 percent of original size [2021-11-02 22:30:12,932 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 167 [2021-11-02 22:30:12,961 INFO L354 Elim1Store]: treesize reduction 87, result has 16.3 percent of original size [2021-11-02 22:30:12,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 360 treesize of output 294 [2021-11-02 22:30:12,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:30:12,998 INFO L354 Elim1Store]: treesize reduction 120, result has 20.5 percent of original size [2021-11-02 22:30:12,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 290 [2021-11-02 22:30:13,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:13,046 INFO L354 Elim1Store]: treesize reduction 470, result has 13.6 percent of original size [2021-11-02 22:30:13,046 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 6 case distinctions, treesize of input 341 treesize of output 335 [2021-11-02 22:30:13,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:13,316 INFO L354 Elim1Store]: treesize reduction 16, result has 78.7 percent of original size [2021-11-02 22:30:13,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 68 treesize of output 74 [2021-11-02 22:30:13,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:30:13,621 INFO L354 Elim1Store]: treesize reduction 124, result has 15.1 percent of original size [2021-11-02 22:30:13,621 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 337 treesize of output 191 [2021-11-02 22:30:13,659 INFO L354 Elim1Store]: treesize reduction 163, result has 11.4 percent of original size [2021-11-02 22:30:13,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 483 treesize of output 396 [2021-11-02 22:30:13,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:30:13,712 INFO L354 Elim1Store]: treesize reduction 242, result has 17.7 percent of original size [2021-11-02 22:30:13,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 468 treesize of output 392 [2021-11-02 22:30:13,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:30:13,784 INFO L354 Elim1Store]: treesize reduction 754, result has 12.4 percent of original size [2021-11-02 22:30:13,785 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 10 case distinctions, treesize of input 464 treesize of output 461 [2021-11-02 22:30:34,026 INFO L354 Elim1Store]: treesize reduction 251, result has 8.1 percent of original size [2021-11-02 22:30:34,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 15 new quantified variables, introduced 21 case distinctions, treesize of input 527 treesize of output 204 [2021-11-02 22:30:34,096 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-11-02 22:30:34,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 117 [2021-11-02 22:30:34,538 INFO L354 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2021-11-02 22:30:34,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 59 [2021-11-02 22:30:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:34,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721966722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:34,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:34,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 35 [2021-11-02 22:30:34,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343371970] [2021-11-02 22:30:34,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 22:30:34,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:34,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 22:30:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1070, Unknown=5, NotChecked=0, Total=1190 [2021-11-02 22:30:34,553 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 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 22:32:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:26,679 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-11-02 22:32:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:32:26,680 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 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 39 [2021-11-02 22:32:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:26,681 INFO L225 Difference]: With dead ends: 48 [2021-11-02 22:32:26,681 INFO L226 Difference]: Without dead ends: 46 [2021-11-02 22:32:26,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 62.4s TimeCoverageRelationStatistics Valid=470, Invalid=2370, Unknown=22, NotChecked=0, Total=2862 [2021-11-02 22:32:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-02 22:32:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-11-02 22:32:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 22:32:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-02 22:32:26,690 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2021-11-02 22:32:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:26,691 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-02 22:32:26,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 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 22:32:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-02 22:32:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:32:26,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:26,693 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2021-11-02 22:32:26,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:32:26,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:32:26,907 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:32:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash 456319593, now seen corresponding path program 9 times [2021-11-02 22:32:26,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:26,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715056592] [2021-11-02 22:32:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:26,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:28,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:28,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715056592] [2021-11-02 22:32:28,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715056592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:32:28,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347006126] [2021-11-02 22:32:28,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:32:28,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:32:28,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:32:28,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:32:28,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:32:29,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 22:32:29,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:32:29,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-02 22:32:29,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:32:29,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:32:29,141 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 13 treesize of output 9 [2021-11-02 22:32:29,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:32:29,232 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:32:29,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:32:29,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:29,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:29,335 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:32:29,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 71 [2021-11-02 22:32:29,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:29,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:29,361 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:32:29,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 67 [2021-11-02 22:32:29,524 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:32:29,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:32:29,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:29,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:29,778 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 22:32:29,779 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 101 [2021-11-02 22:32:29,789 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-02 22:32:29,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 137 [2021-11-02 22:32:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:29,824 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:32:29,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 133 [2021-11-02 22:32:29,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:30,058 INFO L354 Elim1Store]: treesize reduction 102, result has 37.0 percent of original size [2021-11-02 22:32:30,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 77 [2021-11-02 22:32:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:30,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:30,389 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-02 22:32:30,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 131 [2021-11-02 22:32:30,398 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-02 22:32:30,398 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 3 case distinctions, treesize of input 240 treesize of output 234 [2021-11-02 22:32:30,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:30,447 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-11-02 22:32:30,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 225 treesize of output 230 [2021-11-02 22:32:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:30,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:30,751 INFO L354 Elim1Store]: treesize reduction 16, result has 74.6 percent of original size [2021-11-02 22:32:30,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 62 [2021-11-02 22:32:30,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:31,038 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-11-02 22:32:31,039 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 216 treesize of output 141 [2021-11-02 22:32:31,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:31,103 INFO L354 Elim1Store]: treesize reduction 400, result has 16.1 percent of original size [2021-11-02 22:32:31,103 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 10 case distinctions, treesize of input 278 treesize of output 290 [2021-11-02 22:32:32,767 INFO L354 Elim1Store]: treesize reduction 400, result has 8.5 percent of original size [2021-11-02 22:32:32,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 19 new quantified variables, introduced 36 case distinctions, treesize of input 517 treesize of output 209 [2021-11-02 22:32:32,894 INFO L354 Elim1Store]: treesize reduction 364, result has 3.4 percent of original size [2021-11-02 22:32:32,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 110 treesize of output 94 [2021-11-02 22:32:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 5 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:32,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347006126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:32:32,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:32:32,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 32 [2021-11-02 22:32:32,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613460319] [2021-11-02 22:32:32,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:32:32,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:32:32,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:32:32,925 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 22:33:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:09,556 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-11-02 22:33:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:33:09,557 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-02 22:33:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:09,559 INFO L225 Difference]: With dead ends: 70 [2021-11-02 22:33:09,559 INFO L226 Difference]: Without dead ends: 49 [2021-11-02 22:33:09,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=249, Invalid=2103, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:33:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-02 22:33:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-11-02 22:33:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:33:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-11-02 22:33:09,568 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2021-11-02 22:33:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:09,568 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-11-02 22:33:09,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 22:33:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-11-02 22:33:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:33:09,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:09,571 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2021-11-02 22:33:09,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:09,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 22:33:09,775 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:33:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1553331152, now seen corresponding path program 10 times [2021-11-02 22:33:09,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:33:09,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747117680] [2021-11-02 22:33:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:09,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:33:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:33:11,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:33:11,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747117680] [2021-11-02 22:33:11,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747117680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:11,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911320871] [2021-11-02 22:33:11,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:33:11,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:11,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:33:11,957 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:33:11,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:33:12,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:33:12,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:33:12,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-02 22:33:12,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:12,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:33:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:12,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-02 22:33:12,785 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:33:12,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:33:12,898 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 52 treesize of output 48 [2021-11-02 22:33:12,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:12,911 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:33:12,911 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 1 case distinctions, treesize of input 57 treesize of output 45 [2021-11-02 22:33:12,922 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 22:33:13,059 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:33:13,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:33:13,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:13,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:33:13,258 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:33:13,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 117 [2021-11-02 22:33:13,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 152 [2021-11-02 22:33:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:13,287 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:33:13,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 140 [2021-11-02 22:33:13,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:33:13,300 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:33:13,300 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 134 treesize of output 133 [2021-11-02 22:33:13,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:13,518 INFO L354 Elim1Store]: treesize reduction 102, result has 37.0 percent of original size [2021-11-02 22:33:13,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 77 [2021-11-02 22:33:13,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:13,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:33:13,865 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 22:33:13,865 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 154 [2021-11-02 22:33:13,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:13,910 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-11-02 22:33:13,911 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 6 case distinctions, treesize of input 271 treesize of output 265 [2021-11-02 22:33:13,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:13,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:33:13,945 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:33:13,945 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 3 case distinctions, treesize of input 244 treesize of output 250 [2021-11-02 22:33:14,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:14,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:14,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:14,265 INFO L354 Elim1Store]: treesize reduction 162, result has 37.5 percent of original size [2021-11-02 22:33:14,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 62 treesize of output 117 [2021-11-02 22:33:14,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:14,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:33:14,759 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-02 22:33:14,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 191 [2021-11-02 22:33:14,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:14,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:33:14,823 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-11-02 22:33:14,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 394 treesize of output 403 [2021-11-02 22:33:14,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:14,892 INFO L354 Elim1Store]: treesize reduction 400, result has 16.1 percent of original size [2021-11-02 22:33:14,892 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 10 case distinctions, treesize of input 387 treesize of output 384 [2021-11-02 22:33:15,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:15,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:15,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:15,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:15,356 INFO L354 Elim1Store]: treesize reduction 20, result has 77.5 percent of original size [2021-11-02 22:33:15,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 79 treesize of output 87 [2021-11-02 22:33:15,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:33:15,771 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-11-02 22:33:15,772 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 358 treesize of output 203 [2021-11-02 22:33:15,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:15,862 INFO L354 Elim1Store]: treesize reduction 650, result has 14.0 percent of original size [2021-11-02 22:33:15,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 474 treesize of output 474 [2021-11-02 22:33:15,871 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-11-02 22:33:15,872 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 6 case distinctions, treesize of input 459 treesize of output 456 [2021-11-02 22:33:15,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:33:15,934 INFO L354 Elim1Store]: treesize reduction 400, result has 16.1 percent of original size [2021-11-02 22:33:15,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 444 treesize of output 452 [2021-11-02 22:33:18,691 INFO L354 Elim1Store]: treesize reduction 384, result has 12.1 percent of original size [2021-11-02 22:33:18,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 19 new quantified variables, introduced 36 case distinctions, treesize of input 652 treesize of output 268 [2021-11-02 22:33:18,850 INFO L354 Elim1Store]: treesize reduction 364, result has 3.4 percent of original size [2021-11-02 22:33:18,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 169 treesize of output 153 [2021-11-02 22:33:25,373 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-02 22:33:25,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 82 [2021-11-02 22:33:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:33:25,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911320871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:25,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:33:25,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 43 [2021-11-02 22:33:25,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567827789] [2021-11-02 22:33:25,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 22:33:25,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:33:25,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 22:33:25,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1543, Unknown=2, NotChecked=0, Total=1806 [2021-11-02 22:33:25,393 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 22:34:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:39,864 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-11-02 22:34:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:34:39,865 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 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 22:34:39,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:39,866 INFO L225 Difference]: With dead ends: 55 [2021-11-02 22:34:39,866 INFO L226 Difference]: Without dead ends: 53 [2021-11-02 22:34:39,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=687, Invalid=3087, Unknown=8, NotChecked=0, Total=3782 [2021-11-02 22:34:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-02 22:34:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-11-02 22:34:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 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 22:34:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-11-02 22:34:39,875 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2021-11-02 22:34:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:39,876 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-11-02 22:34:39,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 22:34:39,877 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-11-02 22:34:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:34:39,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:39,878 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2021-11-02 22:34:39,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:40,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:34:40,088 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:34:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1315499569, now seen corresponding path program 11 times [2021-11-02 22:34:40,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:34:40,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894632308] [2021-11-02 22:34:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:40,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:34:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:42,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:34:42,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894632308] [2021-11-02 22:34:42,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894632308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:34:42,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520125386] [2021-11-02 22:34:42,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:34:42,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:34:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:34:42,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:34:42,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:34:43,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 22:34:43,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:34:43,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-02 22:34:43,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:43,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:34:43,840 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 22:34:43,844 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 22:34:43,893 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:34:43,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:34:43,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:43,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:34:43,991 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:34:43,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 71 [2021-11-02 22:34:43,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:43,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:34:44,007 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:34:44,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 67 [2021-11-02 22:34:44,144 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:34:44,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:34:44,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:44,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:34:44,381 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 22:34:44,382 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 101 [2021-11-02 22:34:44,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:44,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:34:44,417 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:34:44,418 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 3 case distinctions, treesize of input 134 treesize of output 140 [2021-11-02 22:34:44,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:44,624 INFO L354 Elim1Store]: treesize reduction 102, result has 37.0 percent of original size [2021-11-02 22:34:44,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 77 [2021-11-02 22:34:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:44,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:34:44,903 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-02 22:34:44,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 131 [2021-11-02 22:34:44,922 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-02 22:34:44,923 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 3 case distinctions, treesize of input 240 treesize of output 234 [2021-11-02 22:34:44,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:34:44,973 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-11-02 22:34:44,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 225 treesize of output 230 [2021-11-02 22:34:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:45,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:45,253 INFO L354 Elim1Store]: treesize reduction 162, result has 37.5 percent of original size [2021-11-02 22:34:45,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 62 treesize of output 117 [2021-11-02 22:34:45,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:45,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:34:45,628 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-11-02 22:34:45,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 161 [2021-11-02 22:34:45,638 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-11-02 22:34:45,639 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 6 case distinctions, treesize of input 358 treesize of output 355 [2021-11-02 22:34:45,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:34:45,706 INFO L354 Elim1Store]: treesize reduction 400, result has 16.1 percent of original size [2021-11-02 22:34:45,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 343 treesize of output 351 [2021-11-02 22:34:45,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:46,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:46,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:46,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:46,034 INFO L354 Elim1Store]: treesize reduction 20, result has 77.5 percent of original size [2021-11-02 22:34:46,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 79 treesize of output 87 [2021-11-02 22:34:46,456 INFO L354 Elim1Store]: treesize reduction 400, result has 9.7 percent of original size [2021-11-02 22:34:46,456 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 9 new quantified variables, introduced 16 case distinctions, treesize of input 307 treesize of output 166 [2021-11-02 22:34:46,550 INFO L354 Elim1Store]: treesize reduction 710, result has 13.0 percent of original size [2021-11-02 22:34:46,550 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 15 case distinctions, treesize of input 405 treesize of output 405 [2021-11-02 22:34:46,622 INFO L354 Elim1Store]: treesize reduction 710, result has 13.0 percent of original size [2021-11-02 22:34:46,623 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 15 case distinctions, treesize of input 390 treesize of output 401 [2021-11-02 22:34:51,201 INFO L354 Elim1Store]: treesize reduction 677, result has 5.6 percent of original size [2021-11-02 22:34:51,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 24 new quantified variables, introduced 55 case distinctions, treesize of input 1191 treesize of output 315 [2021-11-02 22:34:51,419 INFO L354 Elim1Store]: treesize reduction 605, result has 2.6 percent of original size [2021-11-02 22:34:51,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 166 treesize of output 132 [2021-11-02 22:34:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:51,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520125386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:34:51,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:34:51,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 43 [2021-11-02 22:34:51,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110408959] [2021-11-02 22:34:51,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 22:34:51,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:34:51,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 22:34:51,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1648, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:34:51,520 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 22:36:02,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:02,867 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-11-02 22:36:02,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:36:02,868 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 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 49 [2021-11-02 22:36:02,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:02,869 INFO L225 Difference]: With dead ends: 80 [2021-11-02 22:36:02,869 INFO L226 Difference]: Without dead ends: 56 [2021-11-02 22:36:02,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=377, Invalid=3783, Unknown=0, NotChecked=0, Total=4160 [2021-11-02 22:36:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-02 22:36:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-11-02 22:36:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-02 22:36:02,878 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2021-11-02 22:36:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:02,879 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-02 22:36:02,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 22:36:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-02 22:36:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:36:02,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:02,880 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2021-11-02 22:36:02,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:03,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:36:03,083 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:36:03,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:03,084 INFO L85 PathProgramCache]: Analyzing trace with hash 121228010, now seen corresponding path program 12 times [2021-11-02 22:36:03,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:03,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950209907] [2021-11-02 22:36:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:03,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 24 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:07,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:36:07,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950209907] [2021-11-02 22:36:07,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950209907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:07,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784470944] [2021-11-02 22:36:07,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:36:07,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:36:07,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:07,332 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:36:07,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:36:08,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 22:36:08,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:36:08,938 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-02 22:36:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:08,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:36:08,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:08,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-02 22:36:09,041 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:36:09,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:36:09,178 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 52 treesize of output 48 [2021-11-02 22:36:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:09,195 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:36:09,195 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 1 case distinctions, treesize of input 57 treesize of output 45 [2021-11-02 22:36:09,214 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 22:36:09,389 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:36:09,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:36:09,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:09,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:09,626 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:36:09,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 117 [2021-11-02 22:36:09,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:09,661 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:36:09,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 155 [2021-11-02 22:36:09,666 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 149 treesize of output 137 [2021-11-02 22:36:09,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:09,681 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:36:09,681 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 134 treesize of output 133 [2021-11-02 22:36:09,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:09,960 INFO L354 Elim1Store]: treesize reduction 102, result has 37.0 percent of original size [2021-11-02 22:36:09,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 77 [2021-11-02 22:36:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:10,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:10,305 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 22:36:10,306 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 154 [2021-11-02 22:36:10,313 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-02 22:36:10,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 262 [2021-11-02 22:36:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:10,351 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-11-02 22:36:10,351 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 6 case distinctions, treesize of input 256 treesize of output 250 [2021-11-02 22:36:10,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:10,377 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:36:10,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 241 treesize of output 243 [2021-11-02 22:36:10,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:10,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:10,775 INFO L354 Elim1Store]: treesize reduction 162, result has 37.5 percent of original size [2021-11-02 22:36:10,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 62 treesize of output 117 [2021-11-02 22:36:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:11,231 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-02 22:36:11,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 191 [2021-11-02 22:36:11,251 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-02 22:36:11,252 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 3 case distinctions, treesize of input 406 treesize of output 400 [2021-11-02 22:36:11,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:11,317 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-11-02 22:36:11,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 391 treesize of output 396 [2021-11-02 22:36:11,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,388 INFO L354 Elim1Store]: treesize reduction 400, result has 16.1 percent of original size [2021-11-02 22:36:11,389 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 10 case distinctions, treesize of input 387 treesize of output 384 [2021-11-02 22:36:11,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:11,913 INFO L354 Elim1Store]: treesize reduction 234, result has 37.8 percent of original size [2021-11-02 22:36:11,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 case distinctions, treesize of input 85 treesize of output 165 [2021-11-02 22:36:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:12,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:12,505 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-11-02 22:36:12,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 423 treesize of output 228 [2021-11-02 22:36:12,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:12,608 INFO L354 Elim1Store]: treesize reduction 650, result has 14.0 percent of original size [2021-11-02 22:36:12,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 569 treesize of output 569 [2021-11-02 22:36:12,622 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-11-02 22:36:12,622 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 6 case distinctions, treesize of input 554 treesize of output 551 [2021-11-02 22:36:12,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:12,702 INFO L354 Elim1Store]: treesize reduction 400, result has 16.1 percent of original size [2021-11-02 22:36:12,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 539 treesize of output 547 [2021-11-02 22:36:13,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:13,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:13,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:13,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:13,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:13,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:13,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:13,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:13,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:13,256 INFO L354 Elim1Store]: treesize reduction 24, result has 79.8 percent of original size [2021-11-02 22:36:13,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 116 [2021-11-02 22:36:13,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:13,907 INFO L354 Elim1Store]: treesize reduction 160, result has 18.4 percent of original size [2021-11-02 22:36:13,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 488 treesize of output 235 [2021-11-02 22:36:13,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:14,087 INFO L354 Elim1Store]: treesize reduction 984, result has 12.4 percent of original size [2021-11-02 22:36:14,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 634 treesize of output 637 [2021-11-02 22:36:14,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:36:14,202 INFO L354 Elim1Store]: treesize reduction 650, result has 14.0 percent of original size [2021-11-02 22:36:14,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 607 treesize of output 622 [2021-11-02 22:36:20,857 INFO L354 Elim1Store]: treesize reduction 581, result has 11.6 percent of original size [2021-11-02 22:36:20,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 24 new quantified variables, introduced 55 case distinctions, treesize of input 1098 treesize of output 354 [2021-11-02 22:36:21,108 INFO L354 Elim1Store]: treesize reduction 565, result has 2.8 percent of original size [2021-11-02 22:36:21,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 213 treesize of output 195 [2021-11-02 22:36:32,706 INFO L354 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-11-02 22:36:32,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 141 treesize of output 109 [2021-11-02 22:36:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 74 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:32,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784470944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:32,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:36:32,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28] total 56 [2021-11-02 22:36:32,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989056857] [2021-11-02 22:36:32,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-02 22:36:32,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:36:32,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-02 22:36:32,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2639, Unknown=4, NotChecked=0, Total=3080 [2021-11-02 22:36:32,731 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:37:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:37:53,910 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-11-02 22:37:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 22:37:53,911 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 22:37:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:37:53,911 INFO L225 Difference]: With dead ends: 62 [2021-11-02 22:37:53,912 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 22:37:53,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=1007, Invalid=4989, Unknown=10, NotChecked=0, Total=6006 [2021-11-02 22:37:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 22:37:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-11-02 22:37:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 22:37:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-11-02 22:37:53,922 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2021-11-02 22:37:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:37:53,923 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-11-02 22:37:53,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:37:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-11-02 22:37:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:37:53,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:37:53,925 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-02 22:37:53,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:37:54,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:37:54,134 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:37:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:37:54,135 INFO L85 PathProgramCache]: Analyzing trace with hash -559052585, now seen corresponding path program 13 times [2021-11-02 22:37:54,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:37:54,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581908176] [2021-11-02 22:37:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:37:54,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:37:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:37:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:37:57,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:37:57,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581908176] [2021-11-02 22:37:57,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581908176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:37:57,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971297734] [2021-11-02 22:37:57,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:37:57,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:37:57,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:37:57,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:37:57,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:37:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:37:58,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-02 22:37:58,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:37:58,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:37:58,858 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 22:37:58,864 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 22:37:58,931 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:37:58,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:37:59,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:59,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:37:59,019 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:37:59,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 71 [2021-11-02 22:37:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:37:59,046 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-02 22:37:59,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 67 [2021-11-02 22:37:59,210 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:37:59,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:37:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:59,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:37:59,440 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 22:37:59,440 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 101 [2021-11-02 22:37:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:59,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:37:59,475 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-02 22:37:59,476 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 3 case distinctions, treesize of input 134 treesize of output 140 [2021-11-02 22:37:59,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:59,717 INFO L354 Elim1Store]: treesize reduction 102, result has 37.0 percent of original size [2021-11-02 22:37:59,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 77 [2021-11-02 22:37:59,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:37:59,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:38:00,022 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-02 22:38:00,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 131 [2021-11-02 22:38:00,030 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-02 22:38:00,030 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 3 case distinctions, treesize of input 240 treesize of output 234 [2021-11-02 22:38:00,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:38:00,068 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-11-02 22:38:00,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 225 treesize of output 230 [2021-11-02 22:38:00,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:00,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:00,370 INFO L354 Elim1Store]: treesize reduction 162, result has 37.5 percent of original size [2021-11-02 22:38:00,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 62 treesize of output 117 [2021-11-02 22:38:00,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:00,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:38:00,782 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-11-02 22:38:00,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 161 [2021-11-02 22:38:00,792 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-11-02 22:38:00,792 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 6 case distinctions, treesize of input 358 treesize of output 355 [2021-11-02 22:38:00,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:38:00,848 INFO L354 Elim1Store]: treesize reduction 400, result has 16.1 percent of original size [2021-11-02 22:38:00,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 343 treesize of output 351 [2021-11-02 22:38:01,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:01,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:01,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:01,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:01,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:01,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:01,250 INFO L354 Elim1Store]: treesize reduction 234, result has 37.8 percent of original size [2021-11-02 22:38:01,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 case distinctions, treesize of input 85 treesize of output 165 [2021-11-02 22:38:01,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:01,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:38:01,763 INFO L354 Elim1Store]: treesize reduction 160, result has 18.4 percent of original size [2021-11-02 22:38:01,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 372 treesize of output 191 [2021-11-02 22:38:01,781 INFO L354 Elim1Store]: treesize reduction 360, result has 0.3 percent of original size [2021-11-02 22:38:01,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 500 treesize of output 500 [2021-11-02 22:38:01,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:38:01,857 INFO L354 Elim1Store]: treesize reduction 650, result has 14.0 percent of original size [2021-11-02 22:38:01,857 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 15 case distinctions, treesize of input 485 treesize of output 496 [2021-11-02 22:38:02,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:02,265 INFO L354 Elim1Store]: treesize reduction 24, result has 79.8 percent of original size [2021-11-02 22:38:02,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 116 [2021-11-02 22:38:02,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:38:02,770 INFO L354 Elim1Store]: treesize reduction 216, result has 16.6 percent of original size [2021-11-02 22:38:02,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 418 treesize of output 191 [2021-11-02 22:38:02,782 INFO L354 Elim1Store]: treesize reduction 600, result has 0.2 percent of original size [2021-11-02 22:38:02,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 540 treesize of output 543 [2021-11-02 22:38:02,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:38:02,899 INFO L354 Elim1Store]: treesize reduction 984, result has 12.4 percent of original size [2021-11-02 22:38:02,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 525 treesize of output 539 [2021-11-02 22:38:07,419 INFO L354 Elim1Store]: treesize reduction 842, result has 8.6 percent of original size [2021-11-02 22:38:07,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 29 new quantified variables, introduced 78 case distinctions, treesize of input 1742 treesize of output 392 [2021-11-02 22:38:07,886 INFO L354 Elim1Store]: treesize reduction 810, result has 2.3 percent of original size [2021-11-02 22:38:07,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 19 new quantified variables, introduced 78 case distinctions, treesize of input 203 treesize of output 167 [2021-11-02 22:38:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:08,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971297734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:08,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:38:08,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 49 [2021-11-02 22:38:08,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406886680] [2021-11-02 22:38:08,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 22:38:08,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:08,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 22:38:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2174, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:38:08,046 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:39:18,833 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-11-02 22:39:18,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:39:18,834 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 22:39:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:39:18,835 INFO L225 Difference]: With dead ends: 90 [2021-11-02 22:39:18,835 INFO L226 Difference]: Without dead ends: 63 [2021-11-02 22:39:18,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=388, Invalid=4442, Unknown=0, NotChecked=0, Total=4830 [2021-11-02 22:39:18,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-02 22:39:18,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2021-11-02 22:39:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-11-02 22:39:18,849 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2021-11-02 22:39:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:18,850 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-11-02 22:39:18,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-11-02 22:39:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 22:39:18,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:18,857 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2021-11-02 22:39:18,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:39:19,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:39:19,071 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:39:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash 807836158, now seen corresponding path program 14 times [2021-11-02 22:39:19,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:19,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735411426] [2021-11-02 22:39:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:19,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:39:24,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:24,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735411426] [2021-11-02 22:39:24,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735411426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:39:24,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663977931] [2021-11-02 22:39:24,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:39:24,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:39:24,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:39:24,021 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:39:24,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:39:25,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:39:25,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:39:25,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-02 22:39:25,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:39:25,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:39:25,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:25,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-02 22:39:25,906 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:39:25,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:39:26,027 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 13 treesize of output 9 [2021-11-02 22:39:26,034 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 52 treesize of output 48 [2021-11-02 22:39:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:26,059 INFO L354 Elim1Store]: treesize reduction 109, result has 10.7 percent of original size [2021-11-02 22:39:26,059 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 1 case distinctions, treesize of input 57 treesize of output 45 [2021-11-02 22:39:26,243 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:39:26,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:39:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:26,490 INFO L354 Elim1Store]: treesize reduction 75, result has 10.7 percent of original size [2021-11-02 22:39:26,490 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 1 case distinctions, treesize of input 136 treesize of output 121 [2021-11-02 22:39:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:26,535 INFO L354 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2021-11-02 22:39:26,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 165 [2021-11-02 22:39:26,556 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-02 22:39:26,556 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 159 treesize of output 147 [2021-11-02 22:39:26,574 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-02 22:39:26,575 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 144 treesize of output 143 [2021-11-02 22:39:26,898 INFO L354 Elim1Store]: treesize reduction 126, result has 37.6 percent of original size [2021-11-02 22:39:26,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 51 treesize of output 93 [2021-11-02 22:39:27,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:27,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:39:27,280 INFO L354 Elim1Store]: treesize reduction 136, result has 13.4 percent of original size [2021-11-02 22:39:27,280 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 167 [2021-11-02 22:39:27,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:27,352 INFO L354 Elim1Store]: treesize reduction 470, result has 13.6 percent of original size [2021-11-02 22:39:27,353 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 6 case distinctions, treesize of input 360 treesize of output 354 [2021-11-02 22:39:27,375 INFO L354 Elim1Store]: treesize reduction 87, result has 16.3 percent of original size [2021-11-02 22:39:27,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 279 [2021-11-02 22:39:27,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:39:27,406 INFO L354 Elim1Store]: treesize reduction 120, result has 20.5 percent of original size [2021-11-02 22:39:27,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 275 [2021-11-02 22:39:27,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:27,856 INFO L354 Elim1Store]: treesize reduction 198, result has 37.9 percent of original size [2021-11-02 22:39:27,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 74 treesize of output 141 [2021-11-02 22:39:28,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:28,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:39:28,408 INFO L354 Elim1Store]: treesize reduction 124, result has 15.1 percent of original size [2021-11-02 22:39:28,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 391 treesize of output 211 [2021-11-02 22:39:28,443 INFO L354 Elim1Store]: treesize reduction 163, result has 11.4 percent of original size [2021-11-02 22:39:28,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 567 treesize of output 466 [2021-11-02 22:39:28,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:28,537 INFO L354 Elim1Store]: treesize reduction 754, result has 12.4 percent of original size [2021-11-02 22:39:28,537 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 10 case distinctions, treesize of input 552 treesize of output 549 [2021-11-02 22:39:28,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:39:28,585 INFO L354 Elim1Store]: treesize reduction 242, result has 17.7 percent of original size [2021-11-02 22:39:28,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 537 treesize of output 447 [2021-11-02 22:39:29,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:29,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:29,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:29,136 INFO L354 Elim1Store]: treesize reduction 282, result has 38.2 percent of original size [2021-11-02 22:39:29,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 case distinctions, treesize of input 101 treesize of output 197 [2021-11-02 22:39:29,873 INFO L354 Elim1Store]: treesize reduction 320, result has 10.1 percent of original size [2021-11-02 22:39:29,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 11 case distinctions, treesize of input 592 treesize of output 252 [2021-11-02 22:39:29,960 INFO L354 Elim1Store]: treesize reduction 460, result has 14.3 percent of original size [2021-11-02 22:39:29,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 822 treesize of output 678 [2021-11-02 22:39:30,040 INFO L354 Elim1Store]: treesize reduction 460, result has 14.3 percent of original size [2021-11-02 22:39:30,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 807 treesize of output 674 [2021-11-02 22:39:30,203 INFO L354 Elim1Store]: treesize reduction 1640, result has 8.4 percent of original size [2021-11-02 22:39:30,203 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 16 case distinctions, treesize of input 803 treesize of output 803 [2021-11-02 22:39:30,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:30,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:30,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:30,943 INFO L354 Elim1Store]: treesize reduction 378, result has 38.3 percent of original size [2021-11-02 22:39:30,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 case distinctions, treesize of input 132 treesize of output 261 [2021-11-02 22:39:32,035 INFO L354 Elim1Store]: treesize reduction 178, result has 8.7 percent of original size [2021-11-02 22:39:32,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 985 treesize of output 306 [2021-11-02 22:39:32,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:39:32,186 INFO L354 Elim1Store]: treesize reduction 226, result has 14.4 percent of original size [2021-11-02 22:39:32,187 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 10 new quantified variables, introduced 15 case distinctions, treesize of input 970 treesize of output 302 [2021-11-02 22:39:32,295 INFO L354 Elim1Store]: treesize reduction 580, result has 7.5 percent of original size [2021-11-02 22:39:32,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 1293 treesize of output 1080 [2021-11-02 22:39:32,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:32,481 INFO L354 Elim1Store]: treesize reduction 1816, result has 9.9 percent of original size [2021-11-02 22:39:32,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 1278 treesize of output 1281 [2021-11-02 22:39:32,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:39:32,591 INFO L354 Elim1Store]: treesize reduction 772, result has 13.1 percent of original size [2021-11-02 22:39:32,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1263 treesize of output 1061 [2021-11-02 22:39:33,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:33,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:33,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:33,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:33,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:33,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:33,670 INFO L354 Elim1Store]: treesize reduction 28, result has 87.6 percent of original size [2021-11-02 22:39:33,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 209 treesize of output 221 [2021-11-02 22:39:34,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:39:34,661 INFO L354 Elim1Store]: treesize reduction 412, result has 10.6 percent of original size [2021-11-02 22:39:34,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1332 treesize of output 324 [2021-11-02 22:39:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:39:34,961 INFO L354 Elim1Store]: treesize reduction 3274, result has 9.0 percent of original size [2021-11-02 22:39:34,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 1940 treesize of output 1946 [2021-11-02 22:39:35,038 INFO L354 Elim1Store]: treesize reduction 322, result has 7.2 percent of original size [2021-11-02 22:39:35,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 12 new quantified variables, introduced 17 case distinctions, treesize of input 1925 treesize of output 1244 [2021-11-02 22:39:35,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:39:35,159 INFO L354 Elim1Store]: treesize reduction 404, result has 12.7 percent of original size [2021-11-02 22:39:35,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1910 treesize of output 1240 [2021-11-02 22:40:23,086 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-02 22:40:23,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-02 22:40:23,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:40:23,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-02 22:40:23,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720810460] [2021-11-02 22:40:23,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 22:40:23,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 22:40:23,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2656, Unknown=7, NotChecked=0, Total=2862 [2021-11-02 22:40:23,089 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:40:23,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-02 22:40:23,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-02 22:40:23,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:40:23,291 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@644e0e1f at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-02 22:40:23,293 INFO L168 Benchmark]: Toolchain (without parser) took 694780.29 ms. Allocated memory was 86.0 MB in the beginning and 220.2 MB in the end (delta: 134.2 MB). Free memory was 47.2 MB in the beginning and 83.6 MB in the end (delta: -36.4 MB). Peak memory consumption was 97.8 MB. Max. memory is 16.1 GB. [2021-11-02 22:40:23,294 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 86.0 MB. Free memory is still 65.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:40:23,294 INFO L168 Benchmark]: CACSL2BoogieTranslator took 557.71 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 47.0 MB in the beginning and 75.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-02 22:40:23,294 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.84 ms. Allocated memory is still 104.9 MB. Free memory was 75.2 MB in the beginning and 73.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:40:23,295 INFO L168 Benchmark]: Boogie Preprocessor took 33.12 ms. Allocated memory is still 104.9 MB. Free memory was 72.8 MB in the beginning and 72.0 MB in the end (delta: 885.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:40:23,295 INFO L168 Benchmark]: RCFGBuilder took 411.96 ms. Allocated memory is still 104.9 MB. Free memory was 71.5 MB in the beginning and 61.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:40:23,295 INFO L168 Benchmark]: TraceAbstraction took 693708.08 ms. Allocated memory was 104.9 MB in the beginning and 220.2 MB in the end (delta: 115.3 MB). Free memory was 61.0 MB in the beginning and 83.6 MB in the end (delta: -22.6 MB). Peak memory consumption was 93.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:40:23,296 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 86.0 MB. Free memory is still 65.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 557.71 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 47.0 MB in the beginning and 75.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.84 ms. Allocated memory is still 104.9 MB. Free memory was 75.2 MB in the beginning and 73.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.12 ms. Allocated memory is still 104.9 MB. Free memory was 72.8 MB in the beginning and 72.0 MB in the end (delta: 885.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 411.96 ms. Allocated memory is still 104.9 MB. Free memory was 71.5 MB in the beginning and 61.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 693708.08 ms. Allocated memory was 104.9 MB in the beginning and 220.2 MB in the end (delta: 115.3 MB). Free memory was 61.0 MB in the beginning and 83.6 MB in the end (delta: -22.6 MB). Peak memory consumption was 93.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@644e0e1f de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@644e0e1f: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/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_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/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 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:40:25,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:40:25,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:40:25,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:40:25,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:40:25,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:40:25,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:40:25,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:40:25,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:40:25,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:40:25,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:40:25,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:40:25,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:40:25,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:40:25,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:40:25,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:40:25,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:40:25,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:40:25,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:40:25,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:40:25,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:40:25,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:40:25,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:40:25,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:40:25,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:40:25,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:40:25,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:40:25,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:40:25,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:40:25,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:40:25,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:40:25,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:40:25,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:40:25,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:40:25,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:40:25,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:40:25,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:40:25,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:40:25,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:40:25,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:40:25,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:40:25,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-02 22:40:25,990 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:40:25,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:40:25,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:40:25,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:40:25,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:40:25,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:40:25,994 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:40:25,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:40:25,995 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:40:25,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:40:25,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:40:25,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:40:25,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:40:25,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:40:25,997 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:40:25,997 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:40:25,997 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:40:25,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:40:25,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:40:25,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:40:25,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:40:25,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:40:25,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:40:25,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:40:25,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:40:26,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:40:26,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:40:26,000 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:40:26,001 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:40:26,001 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:40:26,001 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:40:26,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:40:26,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:40:26,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:40:26,002 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-11-02 22:40:26,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:40:26,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:40:26,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:40:26,522 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:40:26,523 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:40:26,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-02 22:40:26,619 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/data/d65bcef0d/1b7c5b5770e44bfba5fa50727f627108/FLAG5955acea9 [2021-11-02 22:40:27,398 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:40:27,404 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-02 22:40:27,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/data/d65bcef0d/1b7c5b5770e44bfba5fa50727f627108/FLAG5955acea9 [2021-11-02 22:40:27,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/data/d65bcef0d/1b7c5b5770e44bfba5fa50727f627108 [2021-11-02 22:40:27,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:40:27,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:40:27,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:40:27,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:40:27,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:40:27,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:40:27" (1/1) ... [2021-11-02 22:40:27,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158d1543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:27, skipping insertion in model container [2021-11-02 22:40:27,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:40:27" (1/1) ... [2021-11-02 22:40:27,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:40:27,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:40:28,169 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_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-02 22:40:28,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:40:28,193 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:40:28,276 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_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-02 22:40:28,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:40:28,342 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:40:28,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28 WrapperNode [2021-11-02 22:40:28,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:40:28,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:40:28,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:40:28,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:40:28,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (1/1) ... [2021-11-02 22:40:28,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (1/1) ... [2021-11-02 22:40:28,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:40:28,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:40:28,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:40:28,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:40:28,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (1/1) ... [2021-11-02 22:40:28,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (1/1) ... [2021-11-02 22:40:28,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (1/1) ... [2021-11-02 22:40:28,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (1/1) ... [2021-11-02 22:40:28,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (1/1) ... [2021-11-02 22:40:28,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (1/1) ... [2021-11-02 22:40:28,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (1/1) ... [2021-11-02 22:40:28,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:40:28,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:40:28,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:40:28,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:40:28,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (1/1) ... [2021-11-02 22:40:28,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:40:28,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:40:28,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:40:28,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:40:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 22:40:28,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:40:28,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:40:28,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:40:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:40:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 22:40:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:40:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:40:28,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:40:28,976 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:40:28,977 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-02 22:40:28,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:40:28 BoogieIcfgContainer [2021-11-02 22:40:28,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:40:28,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:40:28,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:40:28,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:40:28,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:40:27" (1/3) ... [2021-11-02 22:40:28,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce0d7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:40:28, skipping insertion in model container [2021-11-02 22:40:28,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:28" (2/3) ... [2021-11-02 22:40:28,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce0d7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:40:28, skipping insertion in model container [2021-11-02 22:40:28,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:40:28" (3/3) ... [2021-11-02 22:40:28,997 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-11-02 22:40:29,004 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:40:29,004 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:40:29,071 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:40:29,080 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 22:40:29,081 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:40:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 22:40:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-02 22:40:29,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:29,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-02 22:40:29,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:29,133 INFO L85 PathProgramCache]: Analyzing trace with hash 890006222, now seen corresponding path program 1 times [2021-11-02 22:40:29,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:40:29,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565005825] [2021-11-02 22:40:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:29,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:40:29,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:40:29,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:40:29,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:40:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:29,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-02 22:40:29,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:29,334 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 22:40:29,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:40:29,356 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 22:40:29,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:40:29,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565005825] [2021-11-02 22:40:29,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565005825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:29,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:29,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:40:29,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222973545] [2021-11-02 22:40:29,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:40:29,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:40:29,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:40:29,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:40:29,387 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 22:40:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:29,404 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-02 22:40:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:40:29,406 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-02 22:40:29,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:29,415 INFO L225 Difference]: With dead ends: 22 [2021-11-02 22:40:29,415 INFO L226 Difference]: Without dead ends: 10 [2021-11-02 22:40:29,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 22:40:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-02 22:40:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-02 22:40:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 22:40:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-02 22:40:29,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-11-02 22:40:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:29,456 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-02 22:40:29,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 22:40:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-02 22:40:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-02 22:40:29,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:29,457 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-02 22:40:29,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:29,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:40:29,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash 889648730, now seen corresponding path program 1 times [2021-11-02 22:40:29,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:40:29,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797653337] [2021-11-02 22:40:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:29,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:40:29,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:40:29,677 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:40:29,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:40:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:29,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:40:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:29,879 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 22:40:29,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:40:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:29,930 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:40:29,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797653337] [2021-11-02 22:40:29,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797653337] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:29,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:29,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 22:40:29,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773288295] [2021-11-02 22:40:29,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:40:29,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:40:29,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:40:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:40:29,939 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 22:40:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:29,996 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-02 22:40:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:40:29,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-02 22:40:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:29,998 INFO L225 Difference]: With dead ends: 19 [2021-11-02 22:40:29,998 INFO L226 Difference]: Without dead ends: 13 [2021-11-02 22:40:29,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 22:40:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-02 22:40:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2021-11-02 22:40:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 22:40:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-02 22:40:30,007 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-02 22:40:30,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:30,007 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-02 22:40:30,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 22:40:30,008 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-02 22:40:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:40:30,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:30,009 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:30,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:30,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:40:30,210 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:30,211 INFO L85 PathProgramCache]: Analyzing trace with hash 671286241, now seen corresponding path program 1 times [2021-11-02 22:40:30,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:40:30,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738949512] [2021-11-02 22:40:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:30,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:40:30,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:40:30,214 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:40:30,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:40:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:30,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:40:30,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:30,430 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-02 22:40:30,432 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 1 case distinctions, treesize of input 22 treesize of output 7 [2021-11-02 22:40:30,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-02 22:40:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:30,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:40:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:30,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:40:30,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738949512] [2021-11-02 22:40:30,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738949512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:30,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:30,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:40:30,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138586783] [2021-11-02 22:40:30,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:40:30,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:40:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:40:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:40:30,645 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 22:40:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:30,740 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-02 22:40:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:40:30,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-02 22:40:30,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:30,742 INFO L225 Difference]: With dead ends: 18 [2021-11-02 22:40:30,742 INFO L226 Difference]: Without dead ends: 16 [2021-11-02 22:40:30,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:40:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-02 22:40:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-11-02 22:40:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-02 22:40:30,746 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-02 22:40:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:30,746 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-02 22:40:30,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 22:40:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-02 22:40:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:40:30,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:30,747 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:30,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-02 22:40:30,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:40:30,953 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:30,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:30,954 INFO L85 PathProgramCache]: Analyzing trace with hash 925471903, now seen corresponding path program 1 times [2021-11-02 22:40:30,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:40:30,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415754269] [2021-11-02 22:40:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:30,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:40:30,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:40:30,959 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:40:30,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:40:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:40:31,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:31,135 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 22:40:31,148 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 22:40:31,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-02 22:40:31,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-02 22:40:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:31,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:40:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:31,474 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:40:31,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415754269] [2021-11-02 22:40:31,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415754269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:40:31,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:31,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-02 22:40:31,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960843004] [2021-11-02 22:40:31,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:40:31,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:40:31,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:40:31,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:40:31,483 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 22:40:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:31,611 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-11-02 22:40:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:40:31,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-02 22:40:31,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:31,614 INFO L225 Difference]: With dead ends: 27 [2021-11-02 22:40:31,615 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 22:40:31,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:40:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 22:40:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-11-02 22:40:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 22:40:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-02 22:40:31,620 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-11-02 22:40:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:31,622 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-02 22:40:31,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 22:40:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-02 22:40:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:40:31,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:31,624 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:31,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:31,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:40:31,835 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:31,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1819205402, now seen corresponding path program 2 times [2021-11-02 22:40:31,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:40:31,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094198041] [2021-11-02 22:40:31,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:40:31,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:40:31,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:40:31,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:40:31,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:40:31,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:40:31,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:31,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:40:31,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:32,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-11-02 22:40:32,165 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 37 treesize of output 33 [2021-11-02 22:40:32,189 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-02 22:40:32,193 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 1 case distinctions, treesize of input 30 treesize of output 22 [2021-11-02 22:40:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:40:32,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-02 22:40:32,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-02 22:40:32,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-02 22:40:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:32,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:40:34,768 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) is different from false [2021-11-02 22:40:36,800 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) is different from false [2021-11-02 22:40:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-02 22:40:36,909 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:40:36,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094198041] [2021-11-02 22:40:36,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094198041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:40:36,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:36,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-11-02 22:40:36,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556449995] [2021-11-02 22:40:36,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:40:36,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:40:36,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:40:36,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=115, Unknown=2, NotChecked=46, Total=210 [2021-11-02 22:40:36,915 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 22:40:39,046 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-11-02 22:40:41,055 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-11-02 22:40:43,064 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) (= (_ bv1 32) (select (select |c_#memory_int| (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32))) (_ bv0 32))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))) is different from false [2021-11-02 22:40:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:43,152 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-02 22:40:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:40:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 15 [2021-11-02 22:40:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:43,155 INFO L225 Difference]: With dead ends: 22 [2021-11-02 22:40:43,155 INFO L226 Difference]: Without dead ends: 20 [2021-11-02 22:40:43,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=59, Invalid=138, Unknown=5, NotChecked=140, Total=342 [2021-11-02 22:40:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-02 22:40:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-02 22:40:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 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 22:40:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-02 22:40:43,165 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-11-02 22:40:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:43,166 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-02 22:40:43,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 22:40:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-02 22:40:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:40:43,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:43,168 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-02 22:40:43,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:43,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:40:43,384 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2045993606, now seen corresponding path program 3 times [2021-11-02 22:40:43,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:40:43,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879223420] [2021-11-02 22:40:43,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:40:43,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:40:43,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:40:43,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:40:43,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:40:43,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:40:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:43,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:40:43,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:43,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:40:43,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:40:43,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-11-02 22:40:43,982 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-02 22:40:43,983 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 1 case distinctions, treesize of input 55 treesize of output 62 [2021-11-02 22:40:44,026 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-02 22:40:44,027 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-02 22:40:44,804 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-11-02 22:40:44,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 59 [2021-11-02 22:40:44,829 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-02 22:40:44,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 40 [2021-11-02 22:40:44,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-02 22:40:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:44,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:40:45,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 376 treesize of output 337 [2021-11-02 22:40:48,358 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_5) .cse2 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_7) .cse2 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (or (and (= ULTIMATE.start_main_~t~0.base .cse0) (= c_ULTIMATE.start_main_~t~0.offset .cse1)) (and (= .cse0 (_ bv0 32)) (= .cse1 (_ bv0 32))))))) is different from false [2021-11-02 22:40:50,860 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_5) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2)) (.cse1 (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_7) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2) (_ bv0 32)))) (or (and (= ULTIMATE.start_main_~t~0.base .cse0) .cse1) (and (= .cse0 (_ bv0 32)) .cse1))))) is different from false [2021-11-02 22:40:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-02 22:40:51,414 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:40:51,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879223420] [2021-11-02 22:40:51,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879223420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:40:51,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:40:51,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-02 22:40:51,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348170858] [2021-11-02 22:40:51,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:40:51,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:40:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:40:51,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=144, Unknown=3, NotChecked=50, Total=240 [2021-11-02 22:40:51,417 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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 22:40:53,636 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_5) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2)) (.cse1 (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_7) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2) (_ bv0 32)))) (or (and (= ULTIMATE.start_main_~t~0.base .cse0) .cse1) (and (= .cse0 (_ bv0 32)) .cse1))))) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)) (exists ((v_ULTIMATE.start_main_~p~0.base_24 (_ BitVec 32))) (and (= (select (select |c_#memory_int| v_ULTIMATE.start_main_~p~0.base_24) (_ bv0 32)) (_ bv1 32)) (or (= c_ULTIMATE.start_main_~p~0.base (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.base v_ULTIMATE.start_main_~p~0.base_24)))) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))) is different from false [2021-11-02 22:40:55,662 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_5) .cse2 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_7) .cse2 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (or (and (= ULTIMATE.start_main_~t~0.base .cse0) (= c_ULTIMATE.start_main_~t~0.offset .cse1)) (and (= .cse0 (_ bv0 32)) (= .cse1 (_ bv0 32))))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))) is different from false [2021-11-02 22:40:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:40:58,227 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-11-02 22:40:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:40:58,228 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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 18 [2021-11-02 22:40:58,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:40:58,229 INFO L225 Difference]: With dead ends: 35 [2021-11-02 22:40:58,229 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 22:40:58,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=66, Invalid=217, Unknown=5, NotChecked=132, Total=420 [2021-11-02 22:40:58,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 22:40:58,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-11-02 22:40:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-11-02 22:40:58,237 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2021-11-02 22:40:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:40:58,237 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-11-02 22:40:58,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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 22:40:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-11-02 22:40:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:40:58,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:40:58,239 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-02 22:40:58,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:40:58,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:40:58,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:40:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1985144934, now seen corresponding path program 4 times [2021-11-02 22:40:58,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:40:58,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094295206] [2021-11-02 22:40:58,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:40:58,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:40:58,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:40:58,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:40:58,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:40:58,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:40:58,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:40:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:40:58,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:40:58,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:40:58,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:40:58,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:40:58,868 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:40:58,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-11-02 22:40:59,044 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:40:59,045 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 1 case distinctions, treesize of input 59 treesize of output 62 [2021-11-02 22:40:59,051 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 57 treesize of output 45 [2021-11-02 22:40:59,071 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-02 22:40:59,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-02 22:40:59,470 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-02 22:40:59,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-11-02 22:40:59,491 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-02 22:40:59,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-11-02 22:40:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:40:59,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:41:12,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-11-02 22:41:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 9 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:41:13,021 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:41:13,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094295206] [2021-11-02 22:41:13,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094295206] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:41:13,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:13,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-02 22:41:13,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935328390] [2021-11-02 22:41:13,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:41:13,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:41:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:41:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=121, Unknown=4, NotChecked=0, Total=156 [2021-11-02 22:41:13,029 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:13,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:13,840 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-11-02 22:41:13,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:41:13,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 22:41:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:13,843 INFO L225 Difference]: With dead ends: 37 [2021-11-02 22:41:13,843 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 22:41:13,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=38, Invalid=140, Unknown=4, NotChecked=0, Total=182 [2021-11-02 22:41:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 22:41:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-02 22:41:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 22:41:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-02 22:41:13,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 21 [2021-11-02 22:41:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:13,850 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-02 22:41:13,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-02 22:41:13,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:41:13,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:13,852 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-02 22:41:13,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-02 22:41:14,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:41:14,063 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1299552385, now seen corresponding path program 5 times [2021-11-02 22:41:14,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:41:14,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308937469] [2021-11-02 22:41:14,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:41:14,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:41:14,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:41:14,071 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:41:14,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:41:14,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 22:41:14,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:14,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 22:41:14,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:14,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:41:14,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-11-02 22:41:14,495 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-02 22:41:14,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-02 22:41:14,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-11-02 22:41:14,659 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-02 22:41:14,660 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 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-02 22:41:14,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:41:14,795 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-02 22:41:14,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 31 [2021-11-02 22:41:15,033 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:41:15,033 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 1 case distinctions, treesize of input 104 treesize of output 99 [2021-11-02 22:41:15,041 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 118 treesize of output 106 [2021-11-02 22:41:15,071 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-02 22:41:15,072 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 103 treesize of output 102 [2021-11-02 22:41:15,114 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-02 22:41:15,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 94 [2021-11-02 22:41:15,959 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-11-02 22:41:15,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 70 [2021-11-02 22:41:15,978 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-02 22:41:15,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 51 [2021-11-02 22:41:16,141 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 22:41:16,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-11-02 22:41:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:41:16,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:41:19,017 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_21))) (= (let ((.cse0 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_21 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_21 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) v_DerPreprocessor_12) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_21 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) v_DerPreprocessor_14) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse0))) (_ bv1 32)))) is different from false [2021-11-02 22:41:52,434 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_22 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_22 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_21))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_22)))) (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_22 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_22) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_15)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_21 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-11-02 22:41:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 11 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-02 22:41:55,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:41:55,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308937469] [2021-11-02 22:41:55,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308937469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:41:55,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:55,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-11-02 22:41:55,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667749479] [2021-11-02 22:41:55,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:41:55,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:41:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:41:55,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=306, Unknown=6, NotChecked=74, Total=462 [2021-11-02 22:41:55,530 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 22:41:57,780 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (let ((.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset))) (let ((.cse0 (= .cse4 (_ bv0 32))) (.cse1 (= c_ULTIMATE.start_main_~t~0.base v_ULTIMATE.start_main_~t~0.base_21))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_21))) (and .cse0 .cse1 (forall ((v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (select (select (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_15)))) (store .cse2 v_ULTIMATE.start_main_~t~0.base_21 (store (store (select .cse2 v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13))) v_DerPreprocessor_12) v_DerPreprocessor_14) (_ bv1 32)))) (and (or (not .cse0) (not .cse1)) (or (and (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) .cse1) (= (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse4 v_DerPreprocessor_15)))) (store .cse3 v_ULTIMATE.start_main_~t~0.base_21 (store (store (select .cse3 v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))))))) (forall ((v_ULTIMATE.start_main_~t~0.base_22 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_22 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_21))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_22)))) (= (select (select (let ((.cse5 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_22 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_22) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_15)))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_21 (store (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (let ((.cse6 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse7 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse6 v_DerPreprocessor_13)) (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_12) .cse6 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse7)) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_14) .cse6 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse7))) (_ bv1 32)))) is different from false [2021-11-02 22:42:02,024 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)))) (and (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_21))) (= (let ((.cse0 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_21 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_21 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) v_DerPreprocessor_12) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_21 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) v_DerPreprocessor_14) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse0))) (_ bv1 32)))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (not (= .cse1 c_ULTIMATE.start_main_~p~0.base)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| .cse1))))) (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (let ((.cse6 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset))) (let ((.cse2 (= .cse6 (_ bv0 32))) (.cse3 (= c_ULTIMATE.start_main_~t~0.base v_ULTIMATE.start_main_~t~0.base_21))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_21))) (and .cse2 .cse3 (forall ((v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (select (select (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_15)))) (store .cse4 v_ULTIMATE.start_main_~t~0.base_21 (store (store (select .cse4 v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13))) v_DerPreprocessor_12) v_DerPreprocessor_14) (_ bv1 32)))) (and (or (not .cse2) (not .cse3)) (or (and (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) .cse3) (= (select (select (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse6 v_DerPreprocessor_15)))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_21 (store (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))))))) (forall ((v_ULTIMATE.start_main_~t~0.base_22 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_22 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_21))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_22)))) (= (select (select (let ((.cse7 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_22 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_22) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_15)))) (store .cse7 v_ULTIMATE.start_main_~t~0.base_21 (store (store (select .cse7 v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (= (_ bv1 32) (select (select |c_#memory_int| .cse1) (_ bv0 32))) (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (let ((.cse8 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse9 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse8 v_DerPreprocessor_13)) (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_12) .cse8 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse9)) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_14) .cse8 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse9))) (_ bv1 32))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)))) is different from false [2021-11-02 22:42:04,538 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)))) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| .cse1) (_ bv4 32)))) (and (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_21))) (= (let ((.cse0 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_21 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_21 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) v_DerPreprocessor_12) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_21 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) v_DerPreprocessor_14) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse0))) (_ bv1 32)))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (not (= .cse1 c_ULTIMATE.start_main_~p~0.base)) (= (select (select |c_#memory_$Pointer$.offset| .cse1) (_ bv4 32)) (_ bv0 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| .cse1))))) (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (let ((.cse6 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset))) (let ((.cse2 (= .cse6 (_ bv0 32))) (.cse3 (= c_ULTIMATE.start_main_~t~0.base v_ULTIMATE.start_main_~t~0.base_21))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_21))) (and .cse2 .cse3 (forall ((v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (select (select (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_15)))) (store .cse4 v_ULTIMATE.start_main_~t~0.base_21 (store (store (select .cse4 v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13))) v_DerPreprocessor_12) v_DerPreprocessor_14) (_ bv1 32)))) (and (or (not .cse2) (not .cse3)) (or (and (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) .cse3) (= (select (select (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse6 v_DerPreprocessor_15)))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_21 (store (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))))))) (forall ((v_ULTIMATE.start_main_~t~0.base_22 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_22 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_21))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_22)))) (= (select (select (let ((.cse7 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_22 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_22) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_15)))) (store .cse7 v_ULTIMATE.start_main_~t~0.base_21 (store (store (select .cse7 v_ULTIMATE.start_main_~t~0.base_21) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_13))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (= .cse1 .cse8)) (not (= c_ULTIMATE.start_main_~p~0.base .cse8)) (= (_ bv1 32) (select (select |c_#memory_int| .cse1) (_ bv0 32))) (= (select (select |c_#memory_int| .cse8) (_ bv0 32)) (_ bv1 32)) (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (let ((.cse9 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse10 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse9 v_DerPreprocessor_13)) (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_12) .cse9 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse10)) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_14) .cse9 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse10))) (_ bv1 32))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))))) is different from false [2021-11-02 22:42:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:05,254 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-02 22:42:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:42:05,255 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 22:42:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:05,256 INFO L225 Difference]: With dead ends: 28 [2021-11-02 22:42:05,256 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 22:42:05,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=107, Invalid=410, Unknown=9, NotChecked=230, Total=756 [2021-11-02 22:42:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 22:42:05,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-02 22:42:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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 22:42:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-02 22:42:05,263 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-11-02 22:42:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:05,263 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-02 22:42:05,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 22:42:05,264 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-02 22:42:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:42:05,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:05,265 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-02 22:42:05,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:05,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:42:05,467 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:05,473 INFO L85 PathProgramCache]: Analyzing trace with hash 134691839, now seen corresponding path program 6 times [2021-11-02 22:42:05,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:42:05,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395270275] [2021-11-02 22:42:05,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:42:05,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:42:05,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:42:05,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:42:05,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd7ec295-8686-4979-a5b8-dd2d117ac3c0/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:42:05,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 22:42:05,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:05,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:42:05,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:05,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:42:05,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:42:06,095 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-02 22:42:06,095 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 1 case distinctions, treesize of input 55 treesize of output 62 [2021-11-02 22:42:06,118 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-02 22:42:06,119 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-11-02 22:42:06,500 INFO L354 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2021-11-02 22:42:06,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 95 [2021-11-02 22:42:06,548 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-02 22:42:06,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 92 [2021-11-02 22:42:08,239 INFO L354 Elim1Store]: treesize reduction 98, result has 24.0 percent of original size [2021-11-02 22:42:08,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 166 treesize of output 120 [2021-11-02 22:42:08,308 INFO L354 Elim1Store]: treesize reduction 91, result has 9.9 percent of original size [2021-11-02 22:42:08,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 74 [2021-11-02 22:42:08,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-02 22:42:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:08,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:42:09,030 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-11-02 22:42:09,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-02 22:42:13,659 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32))) (let ((.cse7 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_22) .cse7 c_ULTIMATE.start_main_~p~0.offset))) (.cse2 (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_21) .cse7 c_ULTIMATE.start_main_~p~0.base))) (.cse6 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse3 (select (select .cse2 c_ULTIMATE.start_main_~p~0.base) .cse6)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 c_ULTIMATE.start_main_~p~0.base) .cse6)))) (let ((.cse1 (select (select .cse5 .cse3) .cse4)) (.cse0 (select (select .cse2 .cse3) .cse4))) (or (and (= .cse0 (_ bv0 32)) (= .cse1 (_ bv0 32))) (and (= c_ULTIMATE.start_main_~p~0.offset .cse1) (= .cse0 c_ULTIMATE.start_main_~p~0.base)))))))) is different from false