./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s1if.c --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_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/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_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s1if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/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_f83fa369-9e54-4909-b9e5-baa2f63ecde6/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 1a3387bc5e2da462b89ff029159e07dcc81e24b9a3389e54a743d70d22e0e9eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:43:47,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:43:47,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:43:47,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:43:47,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:43:47,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:43:47,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:43:47,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:43:47,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:43:47,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:43:47,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:43:47,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:43:47,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:43:47,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:43:47,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:43:47,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:43:47,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:43:47,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:43:47,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:43:47,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:43:47,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:43:47,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:43:47,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:43:47,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:43:47,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:43:47,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:43:47,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:43:47,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:43:47,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:43:47,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:43:47,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:43:47,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:43:47,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:43:47,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:43:47,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:43:47,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:43:47,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:43:47,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:43:47,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:43:47,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:43:47,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:43:47,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:43:47,308 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:43:47,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:43:47,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:43:47,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:43:47,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:43:47,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:43:47,319 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:43:47,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:43:47,320 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:43:47,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:43:47,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:43:47,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:43:47,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:43:47,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:43:47,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:43:47,323 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:43:47,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:43:47,324 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:43:47,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:43:47,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:43:47,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:43:47,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:43:47,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:43:47,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:43:47,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:43:47,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:43:47,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:43:47,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:43:47,327 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:43:47,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:43:47,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:43:47,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:43:47,330 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_f83fa369-9e54-4909-b9e5-baa2f63ecde6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a3387bc5e2da462b89ff029159e07dcc81e24b9a3389e54a743d70d22e0e9eb [2021-11-02 22:43:47,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:43:47,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:43:47,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:43:47,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:43:47,673 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:43:47,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-fpi/s1if.c [2021-11-02 22:43:47,755 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/data/bd80c93c8/dce6df0aed334b4fa217143f967cc57a/FLAG11e93766f [2021-11-02 22:43:48,302 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:43:48,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/sv-benchmarks/c/array-fpi/s1if.c [2021-11-02 22:43:48,308 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/data/bd80c93c8/dce6df0aed334b4fa217143f967cc57a/FLAG11e93766f [2021-11-02 22:43:48,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/data/bd80c93c8/dce6df0aed334b4fa217143f967cc57a [2021-11-02 22:43:48,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:43:48,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:43:48,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:43:48,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:43:48,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:43:48,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:48,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3cf6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48, skipping insertion in model container [2021-11-02 22:43:48,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:48,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:43:48,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:43:48,884 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_f83fa369-9e54-4909-b9e5-baa2f63ecde6/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2021-11-02 22:43:48,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:43:48,910 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:43:48,922 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_f83fa369-9e54-4909-b9e5-baa2f63ecde6/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2021-11-02 22:43:48,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:43:48,948 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:43:48,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48 WrapperNode [2021-11-02 22:43:48,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:43:48,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:43:48,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:43:48,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:43:48,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:48,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:48,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:43:48,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:43:48,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:43:48,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:43:48,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:48,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:49,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:49,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:49,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:49,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:49,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:49,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:43:49,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:43:49,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:43:49,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:43:49,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (1/1) ... [2021-11-02 22:43:49,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:43:49,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:49,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:43:49,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:43:49,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:43:49,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:43:49,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:43:49,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:43:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:43:49,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:43:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:43:49,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:43:49,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:43:49,542 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-02 22:43:49,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:43:49 BoogieIcfgContainer [2021-11-02 22:43:49,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:43:49,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:43:49,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:43:49,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:43:49,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:43:48" (1/3) ... [2021-11-02 22:43:49,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bed4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:43:49, skipping insertion in model container [2021-11-02 22:43:49,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:48" (2/3) ... [2021-11-02 22:43:49,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bed4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:43:49, skipping insertion in model container [2021-11-02 22:43:49,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:43:49" (3/3) ... [2021-11-02 22:43:49,555 INFO L111 eAbstractionObserver]: Analyzing ICFG s1if.c [2021-11-02 22:43:49,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:43:49,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:43:49,628 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:43:49,638 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 22:43:49,638 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:43:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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 22:43:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:43:49,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:49,665 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:49,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:49,672 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-11-02 22:43:49,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:49,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517962757] [2021-11-02 22:43:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:49,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:49,903 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 22:43:49,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:49,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517962757] [2021-11-02 22:43:49,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517962757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:43:49,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:43:49,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:43:49,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696970255] [2021-11-02 22:43:49,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:43:49,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:49,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:43:49,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:43:49,948 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:43:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:49,966 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-11-02 22:43:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:43:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:43:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:49,976 INFO L225 Difference]: With dead ends: 34 [2021-11-02 22:43:49,976 INFO L226 Difference]: Without dead ends: 15 [2021-11-02 22:43:49,980 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 22:43:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-02 22:43:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-02 22:43:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 22:43:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-02 22:43:50,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-02 22:43:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:50,018 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-02 22:43:50,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:43:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-02 22:43:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:43:50,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:50,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:50,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:43:50,021 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-11-02 22:43:50,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:50,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008084629] [2021-11-02 22:43:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:50,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:50,130 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 22:43:50,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:50,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008084629] [2021-11-02 22:43:50,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008084629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:43:50,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:43:50,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:43:50,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775335711] [2021-11-02 22:43:50,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:43:50,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:43:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:43:50,136 INFO L87 Difference]: Start difference. First operand 15 states and 17 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 22:43:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:50,208 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-02 22:43:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:43:50,209 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 22:43:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:50,210 INFO L225 Difference]: With dead ends: 28 [2021-11-02 22:43:50,211 INFO L226 Difference]: Without dead ends: 20 [2021-11-02 22:43:50,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:43:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-02 22:43:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-02 22:43:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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 22:43:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-02 22:43:50,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-02 22:43:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:50,228 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-02 22:43:50,228 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 22:43:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-02 22:43:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:43:50,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:50,230 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:50,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:43:50,230 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:50,231 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-11-02 22:43:50,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:50,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390876925] [2021-11-02 22:43:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:50,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:50,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:50,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390876925] [2021-11-02 22:43:50,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390876925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:50,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640588960] [2021-11-02 22:43:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:50,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:50,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:50,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:50,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:43:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:50,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:43:50,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:50,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-02 22:43:50,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:43:51,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:43:51,610 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-02 22:43:51,611 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 5 case distinctions, treesize of input 67 treesize of output 53 [2021-11-02 22:43:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:52,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640588960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:52,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:52,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-02 22:43:52,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978044602] [2021-11-02 22:43:52,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:43:52,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:52,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:43:52,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:43:52,051 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:43:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:52,519 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-11-02 22:43:52,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:43:52,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 22:43:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:52,524 INFO L225 Difference]: With dead ends: 35 [2021-11-02 22:43:52,525 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 22:43:52,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:43:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 22:43:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-02 22:43:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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 22:43:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-02 22:43:52,532 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-11-02 22:43:52,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:52,533 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-02 22:43:52,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:43:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-02 22:43:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:43:52,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:52,534 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:52,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-02 22:43:52,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:52,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-11-02 22:43:52,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:52,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265179113] [2021-11-02 22:43:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:52,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:52,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:52,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265179113] [2021-11-02 22:43:52,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265179113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:52,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206247802] [2021-11-02 22:43:52,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:43:52,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:52,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:52,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:52,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:43:52,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:43:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:52,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:43:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:53,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206247802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:53,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:53,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-02 22:43:53,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170051607] [2021-11-02 22:43:53,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:43:53,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:43:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:43:53,071 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 22:43:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:53,229 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-02 22:43:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:43:53,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 18 [2021-11-02 22:43:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:53,231 INFO L225 Difference]: With dead ends: 33 [2021-11-02 22:43:53,231 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 22:43:53,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:43:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 22:43:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-11-02 22:43:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-02 22:43:53,238 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-11-02 22:43:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:53,238 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-02 22:43:53,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 22:43:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-02 22:43:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:43:53,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:53,239 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:53,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:53,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:53,466 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-11-02 22:43:53,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:53,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11130667] [2021-11-02 22:43:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:53,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:53,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:53,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11130667] [2021-11-02 22:43:53,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11130667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:53,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506434749] [2021-11-02 22:43:53,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:43:53,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:53,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:53,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:53,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:43:53,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:43:53,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:53,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:43:53,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:53,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506434749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:53,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:53,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-02 22:43:53,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744702387] [2021-11-02 22:43:53,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:43:53,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:43:53,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:43:53,788 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 22:43:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:53,881 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-11-02 22:43:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:43:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 22:43:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:53,883 INFO L225 Difference]: With dead ends: 37 [2021-11-02 22:43:53,883 INFO L226 Difference]: Without dead ends: 25 [2021-11-02 22:43:53,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:43:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-02 22:43:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-02 22:43:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 22:43:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-02 22:43:53,889 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2021-11-02 22:43:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:53,889 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-02 22:43:53,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 22:43:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-02 22:43:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:43:53,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:53,891 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:53,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:54,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:54,118 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-11-02 22:43:54,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:54,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522476549] [2021-11-02 22:43:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:54,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:54,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:54,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522476549] [2021-11-02 22:43:54,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522476549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:54,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300140069] [2021-11-02 22:43:54,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:43:54,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:54,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:54,585 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:54,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:43:54,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:43:54,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:54,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:43:54,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:54,718 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 22:43:54,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:43:54,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:43:54,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:43:54,889 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-02 22:43:54,890 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 35 treesize of output 37 [2021-11-02 22:43:55,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:43:55,227 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-02 22:43:55,227 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 3 case distinctions, treesize of input 60 treesize of output 49 [2021-11-02 22:43:55,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-02 22:43:55,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:55,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 22:43:55,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113121204] [2021-11-02 22:43:55,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:43:55,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:55,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:43:55,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:43:55,866 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:56,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:56,573 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-02 22:43:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:43:56,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 22:43:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:56,575 INFO L225 Difference]: With dead ends: 54 [2021-11-02 22:43:56,575 INFO L226 Difference]: Without dead ends: 50 [2021-11-02 22:43:56,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:43:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-02 22:43:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-11-02 22:43:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-11-02 22:43:56,586 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 21 [2021-11-02 22:43:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:56,586 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-11-02 22:43:56,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-11-02 22:43:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:43:56,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:56,588 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:56,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:56,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:56,802 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2021-11-02 22:43:56,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:56,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985446158] [2021-11-02 22:43:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:56,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:56,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:56,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723760877] [2021-11-02 22:43:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:56,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:56,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:56,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:56,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:43:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:56,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:43:56,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:56,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-02 22:43:57,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:43:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:43:57,142 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-02 22:43:57,143 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 5 case distinctions, treesize of input 39 treesize of output 37 [2021-11-02 22:43:57,185 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 22:43:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:57,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:57,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985446158] [2021-11-02 22:43:57,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:57,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723760877] [2021-11-02 22:43:57,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723760877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:57,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:57,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:43:57,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474348721] [2021-11-02 22:43:57,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:43:57,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:57,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:43:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:43:57,206 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:57,325 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-11-02 22:43:57,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:43:57,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 22:43:57,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:57,327 INFO L225 Difference]: With dead ends: 56 [2021-11-02 22:43:57,327 INFO L226 Difference]: Without dead ends: 41 [2021-11-02 22:43:57,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:43:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-02 22:43:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-11-02 22:43:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-11-02 22:43:57,336 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 21 [2021-11-02 22:43:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:57,336 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-11-02 22:43:57,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-11-02 22:43:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:43:57,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:57,338 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:57,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:57,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:57,566 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:57,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1315040515, now seen corresponding path program 2 times [2021-11-02 22:43:57,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:57,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004625151] [2021-11-02 22:43:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:57,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:57,578 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:57,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725649250] [2021-11-02 22:43:57,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:43:57,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:57,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:57,591 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:57,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:43:57,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:43:57,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:57,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:43:57,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:57,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:43:57,785 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:43:57,785 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 26 treesize of output 25 [2021-11-02 22:43:57,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:57,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004625151] [2021-11-02 22:43:57,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:57,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725649250] [2021-11-02 22:43:57,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-02 22:43:57,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:43:57,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-02 22:43:57,860 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-02 22:43:57,861 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-02 22:43:57,870 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 22:43:57,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:58,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:43:58,089 INFO L731 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1] [2021-11-02 22:43:58,091 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:43:58,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:43:58 BoogieIcfgContainer [2021-11-02 22:43:58,104 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:43:58,104 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:43:58,104 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:43:58,105 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:43:58,105 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:43:49" (3/4) ... [2021-11-02 22:43:58,114 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-02 22:43:58,115 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:43:58,116 INFO L168 Benchmark]: Toolchain (without parser) took 9444.07 ms. Allocated memory was 96.5 MB in the beginning and 151.0 MB in the end (delta: 54.5 MB). Free memory was 62.1 MB in the beginning and 51.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 64.2 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:58,117 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 69.4 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:43:58,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.37 ms. Allocated memory was 96.5 MB in the beginning and 125.8 MB in the end (delta: 29.4 MB). Free memory was 61.9 MB in the beginning and 100.5 MB in the end (delta: -38.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:58,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.97 ms. Allocated memory is still 125.8 MB. Free memory was 100.5 MB in the beginning and 99.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:43:58,135 INFO L168 Benchmark]: Boogie Preprocessor took 39.39 ms. Allocated memory is still 125.8 MB. Free memory was 99.2 MB in the beginning and 97.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:58,136 INFO L168 Benchmark]: RCFGBuilder took 516.41 ms. Allocated memory is still 125.8 MB. Free memory was 97.9 MB in the beginning and 86.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:58,136 INFO L168 Benchmark]: TraceAbstraction took 8556.47 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 86.0 MB in the beginning and 51.1 MB in the end (delta: 34.9 MB). Peak memory consumption was 60.7 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:58,137 INFO L168 Benchmark]: Witness Printer took 10.38 ms. Allocated memory is still 151.0 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:43:58,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 69.4 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 276.37 ms. Allocated memory was 96.5 MB in the beginning and 125.8 MB in the end (delta: 29.4 MB). Free memory was 61.9 MB in the beginning and 100.5 MB in the end (delta: -38.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.97 ms. Allocated memory is still 125.8 MB. Free memory was 100.5 MB in the beginning and 99.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.39 ms. Allocated memory is still 125.8 MB. Free memory was 99.2 MB in the beginning and 97.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 516.41 ms. Allocated memory is still 125.8 MB. Free memory was 97.9 MB in the beginning and 86.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8556.47 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 86.0 MB in the beginning and 51.1 MB in the end (delta: 34.9 MB). Peak memory consumption was 60.7 MB. Max. memory is 16.1 GB. * Witness Printer took 10.38 ms. Allocated memory is still 151.0 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/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 -> 1a3387bc5e2da462b89ff029159e07dcc81e24b9a3389e54a743d70d22e0e9eb [2021-11-02 22:44:01,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:44:01,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:44:01,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:44:01,468 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:44:01,469 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:44:01,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-fpi/s1if.c [2021-11-02 22:44:01,542 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/data/4f86dfe25/72677839dd6e402fa677ca5d2eef8603/FLAGf0b57bbc1 [2021-11-02 22:44:02,068 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:44:02,069 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/sv-benchmarks/c/array-fpi/s1if.c [2021-11-02 22:44:02,077 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/data/4f86dfe25/72677839dd6e402fa677ca5d2eef8603/FLAGf0b57bbc1 [2021-11-02 22:44:02,439 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/data/4f86dfe25/72677839dd6e402fa677ca5d2eef8603 [2021-11-02 22:44:02,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:44:02,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:44:02,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:44:02,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:44:02,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:44:02,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a4b0bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02, skipping insertion in model container [2021-11-02 22:44:02,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:44:02,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:44:02,693 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_f83fa369-9e54-4909-b9e5-baa2f63ecde6/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2021-11-02 22:44:02,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:44:02,748 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:44:02,775 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_f83fa369-9e54-4909-b9e5-baa2f63ecde6/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2021-11-02 22:44:02,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:44:02,823 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:44:02,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02 WrapperNode [2021-11-02 22:44:02,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:44:02,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:44:02,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:44:02,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:44:02,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:44:02,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:44:02,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:44:02,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:44:02,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:44:02,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:44:02,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:44:02,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:44:02,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (1/1) ... [2021-11-02 22:44:02,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:44:03,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:03,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:44:03,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:44:03,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:44:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:44:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:44:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 22:44:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:44:03,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:44:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:44:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 22:44:03,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:44:03,589 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-02 22:44:03,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:44:03 BoogieIcfgContainer [2021-11-02 22:44:03,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:44:03,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:44:03,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:44:03,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:44:03,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:44:02" (1/3) ... [2021-11-02 22:44:03,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a50c1cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:44:03, skipping insertion in model container [2021-11-02 22:44:03,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:44:02" (2/3) ... [2021-11-02 22:44:03,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a50c1cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:44:03, skipping insertion in model container [2021-11-02 22:44:03,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:44:03" (3/3) ... [2021-11-02 22:44:03,624 INFO L111 eAbstractionObserver]: Analyzing ICFG s1if.c [2021-11-02 22:44:03,631 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:44:03,631 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:44:03,717 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:44:03,729 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 22:44:03,730 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:44:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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 22:44:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:44:03,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:03,761 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:03,762 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-11-02 22:44:03,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:44:03,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170159898] [2021-11-02 22:44:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:03,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:44:03,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:44:03,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:44:03,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:44:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:03,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-02 22:44:03,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:04,053 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 22:44:04,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:44:04,130 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 22:44:04,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:44:04,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170159898] [2021-11-02 22:44:04,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170159898] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:44:04,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:44:04,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:44:04,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361790471] [2021-11-02 22:44:04,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:44:04,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:44:04,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:44:04,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:44:04,185 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:44:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:04,203 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-11-02 22:44:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:44:04,205 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:44:04,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:04,214 INFO L225 Difference]: With dead ends: 34 [2021-11-02 22:44:04,214 INFO L226 Difference]: Without dead ends: 15 [2021-11-02 22:44:04,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 22:44:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-02 22:44:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-02 22:44:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 22:44:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-02 22:44:04,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-02 22:44:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:04,264 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-02 22:44:04,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:44:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-02 22:44:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:44:04,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:04,266 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:04,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:04,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:44:04,479 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-11-02 22:44:04,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:44:04,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114128988] [2021-11-02 22:44:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:04,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:44:04,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:44:04,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:44:04,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:44:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:44:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:04,920 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 22:44:04,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:44:05,032 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 22:44:05,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:44:05,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114128988] [2021-11-02 22:44:05,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114128988] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:44:05,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:44:05,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-02 22:44:05,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558689378] [2021-11-02 22:44:05,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:44:05,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:44:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:44:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:44:05,037 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:05,331 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-02 22:44:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:44:05,332 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:44:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:05,333 INFO L225 Difference]: With dead ends: 28 [2021-11-02 22:44:05,333 INFO L226 Difference]: Without dead ends: 20 [2021-11-02 22:44:05,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:44:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-02 22:44:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-02 22:44:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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 22:44:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-02 22:44:05,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-02 22:44:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:05,342 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-02 22:44:05,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-02 22:44:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:44:05,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:05,344 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:05,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-02 22:44:05,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:44:05,558 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:05,559 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-11-02 22:44:05,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:44:05,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933269697] [2021-11-02 22:44:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:05,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:44:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:44:05,576 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:44:05,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:44:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:44:05,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:05,893 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 22:44:05,905 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 12 treesize of output 10 [2021-11-02 22:44:05,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:44:06,377 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-02 22:44:06,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-11-02 22:44:06,622 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:44:06,622 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 51 treesize of output 35 [2021-11-02 22:44:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:44:06,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:44:13,266 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 22:44:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:44:13,447 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:44:13,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933269697] [2021-11-02 22:44:13,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933269697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:44:13,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:13,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-02 22:44:13,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613675754] [2021-11-02 22:44:13,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:44:13,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:44:13,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:44:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=296, Unknown=2, NotChecked=0, Total=380 [2021-11-02 22:44:13,452 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:15,416 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-02 22:44:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:44:15,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 22:44:15,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:15,420 INFO L225 Difference]: With dead ends: 41 [2021-11-02 22:44:15,421 INFO L226 Difference]: Without dead ends: 32 [2021-11-02 22:44:15,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=197, Invalid=671, Unknown=2, NotChecked=0, Total=870 [2021-11-02 22:44:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-02 22:44:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-11-02 22:44:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-02 22:44:15,435 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2021-11-02 22:44:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:15,435 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-02 22:44:15,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-02 22:44:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:44:15,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:15,437 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:15,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:15,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:44:15,653 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:15,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:15,654 INFO L85 PathProgramCache]: Analyzing trace with hash 680869797, now seen corresponding path program 1 times [2021-11-02 22:44:15,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:44:15,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833835307] [2021-11-02 22:44:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:15,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:44:15,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:44:15,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:44:15,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:44:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:15,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:44:15,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:15,853 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 22:44:15,941 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 22:44:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:44:15,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:44:16,050 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 14 treesize of output 12 [2021-11-02 22:44:16,055 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 22 treesize of output 20 [2021-11-02 22:44:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:44:16,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:44:16,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833835307] [2021-11-02 22:44:16,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833835307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:44:16,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:16,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-02 22:44:16,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080599221] [2021-11-02 22:44:16,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:44:16,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:44:16,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:44:16,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:44:16,086 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 22:44:16,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:16,286 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-02 22:44:16,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:44:16,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 22:44:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:16,288 INFO L225 Difference]: With dead ends: 35 [2021-11-02 22:44:16,288 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 22:44:16,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:44:16,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 22:44:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-02 22:44:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-02 22:44:16,294 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-11-02 22:44:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:16,294 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-02 22:44:16,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 22:44:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-02 22:44:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:44:16,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:16,296 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:16,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:16,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:44:16,515 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-11-02 22:44:16,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:44:16,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130449883] [2021-11-02 22:44:16,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:44:16,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:44:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:44:16,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:44:16,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:44:16,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:44:16,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:16,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:44:16,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:44:17,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:44:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:44:17,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:44:17,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130449883] [2021-11-02 22:44:17,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130449883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:44:17,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:17,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-02 22:44:17,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651030543] [2021-11-02 22:44:17,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:44:17,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:44:17,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:44:17,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:44:17,362 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 22:44:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:18,231 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-11-02 22:44:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:44:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 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 22:44:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:18,233 INFO L225 Difference]: With dead ends: 54 [2021-11-02 22:44:18,233 INFO L226 Difference]: Without dead ends: 47 [2021-11-02 22:44:18,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:44:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-02 22:44:18,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2021-11-02 22:44:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 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 22:44:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-02 22:44:18,243 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 18 [2021-11-02 22:44:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:18,243 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-02 22:44:18,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 22:44:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-02 22:44:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:44:18,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:18,245 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:18,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:18,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:44:18,457 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:18,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:18,458 INFO L85 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-11-02 22:44:18,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:44:18,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76837992] [2021-11-02 22:44:18,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:44:18,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:44:18,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:44:18,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:44:18,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:44:18,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:44:18,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:18,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:44:18,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:44:18,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:44:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:44:19,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:44:19,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76837992] [2021-11-02 22:44:19,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76837992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:44:19,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:19,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-02 22:44:19,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780542740] [2021-11-02 22:44:19,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:44:19,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:44:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:44:19,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:44:19,178 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 22:44:19,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:19,668 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-02 22:44:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:44:19,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 19 [2021-11-02 22:44:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:19,670 INFO L225 Difference]: With dead ends: 46 [2021-11-02 22:44:19,670 INFO L226 Difference]: Without dead ends: 34 [2021-11-02 22:44:19,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:44:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-02 22:44:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-02 22:44:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:44:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-02 22:44:19,677 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 19 [2021-11-02 22:44:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:19,677 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-02 22:44:19,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 22:44:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-02 22:44:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:44:19,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:19,679 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:19,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-02 22:44:19,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:44:19,890 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:19,891 INFO L85 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-11-02 22:44:19,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:44:19,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578829236] [2021-11-02 22:44:19,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:44:19,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:44:19,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:44:19,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:44:19,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:44:20,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:44:20,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:20,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:44:20,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:20,165 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 13 treesize of output 11 [2021-11-02 22:44:20,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:44:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:44:20,406 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-02 22:44:20,406 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 35 treesize of output 37 [2021-11-02 22:44:21,078 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-02 22:44:21,079 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 3 case distinctions, treesize of input 60 treesize of output 49 [2021-11-02 22:44:21,451 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-02 22:44:21,452 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 5 case distinctions, treesize of input 55 treesize of output 39 [2021-11-02 22:44:21,709 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-02 22:44:21,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 39 [2021-11-02 22:44:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:44:21,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:44:28,584 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:44:28,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 386 treesize of output 1 [2021-11-02 22:44:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:44:28,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:44:28,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578829236] [2021-11-02 22:44:28,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578829236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:44:28,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:28,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-11-02 22:44:28,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267579026] [2021-11-02 22:44:28,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:44:28,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:44:28,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:44:28,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=636, Unknown=1, NotChecked=0, Total=756 [2021-11-02 22:44:28,597 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 22:44:54,973 WARN L207 SmtUtils]: Spent 21.06 s on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-11-02 22:45:04,337 WARN L207 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-11-02 22:45:35,055 WARN L207 SmtUtils]: Spent 23.80 s on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-11-02 22:46:10,249 WARN L207 SmtUtils]: Spent 29.52 s on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2021-11-02 22:46:41,036 WARN L207 SmtUtils]: Spent 27.78 s on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2021-11-02 22:46:41,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:41,151 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-11-02 22:46:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:46:41,153 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 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 22:46:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:41,154 INFO L225 Difference]: With dead ends: 39 [2021-11-02 22:46:41,154 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 22:46:41,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 127.0s TimeCoverageRelationStatistics Valid=329, Invalid=1738, Unknown=3, NotChecked=0, Total=2070 [2021-11-02 22:46:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 22:46:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-11-02 22:46:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-11-02 22:46:41,161 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2021-11-02 22:46:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:41,161 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-11-02 22:46:41,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 22:46:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-11-02 22:46:41,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:46:41,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:46:41,162 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:41,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:41,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:46:41,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:46:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:41,367 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2021-11-02 22:46:41,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:46:41,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982152457] [2021-11-02 22:46:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:41,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:46:41,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:46:41,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:46:41,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:46:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:41,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:46:41,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:41,634 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 12 treesize of output 10 [2021-11-02 22:46:41,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:46:42,063 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-11-02 22:46:42,064 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 5 case distinctions, treesize of input 39 treesize of output 37 [2021-11-02 22:46:42,219 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 7 [2021-11-02 22:46:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:46:42,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:46:51,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:46:51,842 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 197 treesize of output 191 [2021-11-02 22:46:53,452 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-11-02 22:46:53,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 108 [2021-11-02 22:46:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:46:54,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:46:54,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982152457] [2021-11-02 22:46:54,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982152457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:46:54,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:46:54,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-02 22:46:54,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876542017] [2021-11-02 22:46:54,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:46:54,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:46:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:46:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=167, Unknown=3, NotChecked=0, Total=210 [2021-11-02 22:46:54,041 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 22:46:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:54,865 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-02 22:46:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:46:54,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 21 [2021-11-02 22:46:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:54,868 INFO L225 Difference]: With dead ends: 41 [2021-11-02 22:46:54,868 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 22:46:54,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=70, Invalid=269, Unknown=3, NotChecked=0, Total=342 [2021-11-02 22:46:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 22:46:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-02 22:46:54,873 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 22:46:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-11-02 22:46:54,874 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2021-11-02 22:46:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:54,874 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-11-02 22:46:54,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 22:46:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-11-02 22:46:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:46:54,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:46:54,876 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:54,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:55,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:46:55,086 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:46:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:55,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2021-11-02 22:46:55,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:46:55,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912348296] [2021-11-02 22:46:55,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:46:55,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:46:55,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:46:55,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:46:55,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:46:55,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 22:46:55,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:46:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:46:55,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:46:56,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:46:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:46:57,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:46:57,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912348296] [2021-11-02 22:46:57,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912348296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:46:57,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:46:57,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-11-02 22:46:57,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637311] [2021-11-02 22:46:57,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:46:57,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:46:57,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:46:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:46:57,206 INFO L87 Difference]: Start difference. First operand 25 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 22:46:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:58,900 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-02 22:46:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:46:58,901 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 23 [2021-11-02 22:46:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:58,902 INFO L225 Difference]: With dead ends: 34 [2021-11-02 22:46:58,902 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 22:46:58,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=222, Invalid=648, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:46:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 22:46:58,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-11-02 22:46:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-02 22:46:58,908 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2021-11-02 22:46:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:58,909 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-02 22:46:58,909 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 22:46:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-02 22:46:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:46:58,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:46:58,910 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:58,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:59,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:46:59,130 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:46:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 6 times [2021-11-02 22:46:59,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:46:59,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322487818] [2021-11-02 22:46:59,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:46:59,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:46:59,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:46:59,132 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:46:59,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 22:46:59,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 22:46:59,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:46:59,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:46:59,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:59,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-02 22:46:59,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:46:59,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:47:00,089 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-02 22:47:00,090 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 28 treesize of output 30 [2021-11-02 22:47:04,372 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:47:04,372 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 39 treesize of output 44 [2021-11-02 22:47:05,138 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-02 22:47:05,139 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 3 case distinctions, treesize of input 60 treesize of output 49 [2021-11-02 22:47:05,778 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-11-02 22:47:05,778 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 3 case distinctions, treesize of input 65 treesize of output 54 [2021-11-02 22:47:06,702 INFO L354 Elim1Store]: treesize reduction 174, result has 13.9 percent of original size [2021-11-02 22:47:06,703 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 9 case distinctions, treesize of input 72 treesize of output 55 [2021-11-02 22:47:07,644 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-02 22:47:07,644 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 89 treesize of output 45 [2021-11-02 22:47:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:47:07,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:47:44,032 INFO L354 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2021-11-02 22:47:44,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65964 treesize of output 1 [2021-11-02 22:47:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:44,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:47:44,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322487818] [2021-11-02 22:47:44,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322487818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:47:44,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:47:44,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-11-02 22:47:44,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180723701] [2021-11-02 22:47:44,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 22:47:44,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:47:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 22:47:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1123, Unknown=11, NotChecked=0, Total=1332 [2021-11-02 22:47:44,048 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 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 22:47:46,178 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse7 (not (bvslt (_ bv2 32) c_~N~0))) (.cse8 (bvslt (_ bv3 32) c_~N~0))) (and (or (forall ((v_ULTIMATE.start_main_~i~0_82 (_ BitVec 32))) (let ((.cse6 (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (bvadd (bvmul v_ULTIMATE.start_main_~i~0_82 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse6))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse0 (select .cse6 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse2 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse1 .cse0))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse1 .cse0 .cse2))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~a~0.offset)))) (or (not (= .cse0 (_ bv1 32))) (= c_~N~0 (bvadd .cse1 .cse0 .cse2 .cse3)) (not (= .cse2 (_ bv1 32))) (not (= .cse3 (_ bv1 32))))))))))) .cse7 .cse8) (or (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~i~0_82 (_ BitVec 32))) (let ((.cse15 (store (let ((.cse16 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse16 ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (bvadd (_ bv4 32) .cse16 ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) (bvadd (bvmul v_ULTIMATE.start_main_~i~0_82 (_ bv4 32)) ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (let ((.cse13 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse15))) (let ((.cse14 (select .cse13 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse9 (select .cse14 |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse10 (select .cse15 ULTIMATE.start_main_~a~0.offset))) (let ((.cse11 (select (select (store .cse13 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse14 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse9 .cse10))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset)))) (let ((.cse12 (select (select (store .cse13 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse14 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse9 .cse10 .cse11))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) ULTIMATE.start_main_~a~0.offset)))) (or (= c_~N~0 (bvadd .cse9 .cse10 .cse11 .cse12)) (not (= (_ bv1 32) .cse12)) (not (= .cse11 (_ bv1 32))) (not (= .cse10 (_ bv1 32))))))))))) .cse7 .cse8) (or .cse7 .cse8 (forall ((v_ULTIMATE.start_main_~i~0_82 (_ BitVec 32))) (let ((.cse23 (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (bvadd (bvmul v_ULTIMATE.start_main_~i~0_82 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (let ((.cse21 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse23))) (let ((.cse22 (select .cse21 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse17 (select .cse23 c_ULTIMATE.start_main_~a~0.offset)) (.cse19 (select .cse22 |c_ULTIMATE.start_main_~#sum~0.offset|))) (let ((.cse20 (select (select (store .cse21 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse22 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse17 .cse19))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse18 (select (select (store .cse21 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse22 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse17 .cse19 .cse20))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~a~0.offset)))) (or (not (= .cse17 (_ bv1 32))) (= (bvadd .cse17 .cse18 .cse19 .cse20) c_~N~0) (not (= .cse18 (_ bv1 32))) (not (= (_ bv1 32) .cse20))))))))))) (or .cse7 (forall ((ULTIMATE.start_main_~i~0 (_ BitVec 32))) (let ((.cse30 (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd (bvmul ULTIMATE.start_main_~i~0 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (let ((.cse28 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse30))) (let ((.cse29 (select .cse28 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse26 (select .cse30 c_ULTIMATE.start_main_~a~0.offset)) (.cse27 (select .cse29 |c_ULTIMATE.start_main_~#sum~0.offset|))) (let ((.cse24 (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse29 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse26 .cse27))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse25 (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse29 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse24 .cse26 .cse27))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~a~0.offset)))) (or (not (= .cse24 (_ bv1 32))) (= c_~N~0 (bvadd .cse25 .cse24 .cse26 .cse27)) (not (= .cse25 (_ bv1 32))) (not (= .cse26 (_ bv1 32))))))))))) .cse8))) is different from true [2021-11-02 22:48:16,605 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse22 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32))) (.cse20 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse15 (select .cse20 |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse16 (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse22 c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse1 (bvadd .cse15 .cse16))) (let ((.cse0 (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) c_~N~0)) (.cse14 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0.offset| .cse1)) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) .cse22 c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse17 (not (= .cse14 (_ bv1 32)))) (.cse18 (bvslt (bvadd (_ bv2 32) c_ULTIMATE.start_main_~i~0) c_~N~0)) (.cse2 (not (= |c_ULTIMATE.start_main_#t~mem11| (_ bv1 32)))) (.cse21 (bvadd .cse14 .cse15 .cse16)) (.cse19 (not .cse0)) (.cse10 (not (bvslt (_ bv2 32) c_~N~0))) (.cse11 (bvslt (_ bv3 32) c_~N~0)) (.cse12 (bvsle c_~N~0 (_ bv536870911 32)))) (and (or .cse0 (= c_~N~0 .cse1) .cse2) (or (forall ((v_ULTIMATE.start_main_~i~0_82 (_ BitVec 32))) (let ((.cse9 (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (bvadd (bvmul v_ULTIMATE.start_main_~i~0_82 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse9))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse4 (select .cse8 |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse3 (select .cse9 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse5 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse4 .cse3))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse6 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse4 .cse3 .cse5))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~a~0.offset)))) (or (not (= .cse3 (_ bv1 32))) (= c_~N~0 (bvadd .cse4 .cse3 .cse5 .cse6)) (not (= .cse5 (_ bv1 32))) (not (= .cse6 (_ bv1 32))))))))))) .cse10 .cse11) (bvslt (bvadd (_ bv4294967295 32) c_ULTIMATE.start_main_~i~0) c_~N~0) (or (and (not .cse12) (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32))) (and (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32)) .cse12)) (let ((.cse13 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0.offset| .cse21)) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) .cse22 c_ULTIMATE.start_main_~a~0.offset)))) (or (= c_~N~0 (bvadd .cse13 .cse14 .cse15 .cse16)) .cse17 (not .cse18) .cse2 (not (= .cse13 (_ bv1 32))) (bvslt (bvadd (_ bv3 32) c_ULTIMATE.start_main_~i~0) c_~N~0) .cse19)) (exists ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (let ((.cse23 (select |c_#memory_int| ULTIMATE.start_main_~a~0.base))) (let ((.cse24 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse25 (select .cse23 (bvadd (_ bv4294967292 32) (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)) ULTIMATE.start_main_~a~0.offset)))) (and (= (select .cse23 ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (= .cse24 (bvadd (_ bv2 32) .cse25)) (= (_ bv1 32) .cse25) (= .cse24 (bvadd (select .cse23 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset)) (_ bv1 32) .cse25)) (not (= ULTIMATE.start_main_~a~0.base |c_ULTIMATE.start_main_~#sum~0.base|)))))) (= (_ bv3 32) c_ULTIMATE.start_main_~i~0) (or (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~i~0_82 (_ BitVec 32))) (let ((.cse32 (store (let ((.cse33 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse33 ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (bvadd (_ bv4 32) .cse33 ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) (bvadd (bvmul v_ULTIMATE.start_main_~i~0_82 (_ bv4 32)) ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (let ((.cse30 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse32))) (let ((.cse31 (select .cse30 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse26 (select .cse31 |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse27 (select .cse32 ULTIMATE.start_main_~a~0.offset))) (let ((.cse28 (select (select (store .cse30 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse31 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse26 .cse27))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset)))) (let ((.cse29 (select (select (store .cse30 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse31 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse26 .cse27 .cse28))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) ULTIMATE.start_main_~a~0.offset)))) (or (= c_~N~0 (bvadd .cse26 .cse27 .cse28 .cse29)) (not (= (_ bv1 32) .cse29)) (not (= .cse28 (_ bv1 32))) (not (= .cse27 (_ bv1 32))))))))))) .cse10 .cse11) (or .cse10 .cse11 (forall ((v_ULTIMATE.start_main_~i~0_82 (_ BitVec 32))) (let ((.cse40 (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (bvadd (bvmul v_ULTIMATE.start_main_~i~0_82 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (let ((.cse38 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse40))) (let ((.cse39 (select .cse38 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse34 (select .cse40 c_ULTIMATE.start_main_~a~0.offset)) (.cse36 (select .cse39 |c_ULTIMATE.start_main_~#sum~0.offset|))) (let ((.cse37 (select (select (store .cse38 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse34 .cse36))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse35 (select (select (store .cse38 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse39 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse34 .cse36 .cse37))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~a~0.offset)))) (or (not (= .cse34 (_ bv1 32))) (= (bvadd .cse34 .cse35 .cse36 .cse37) c_~N~0) (not (= .cse35 (_ bv1 32))) (not (= (_ bv1 32) .cse37))))))))))) (or .cse17 .cse18 .cse2 (= c_~N~0 .cse21) .cse19) (not (bvsle c_~N~0 (_ bv0 32))) (or .cse10 (forall ((ULTIMATE.start_main_~i~0 (_ BitVec 32))) (let ((.cse47 (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd (bvmul ULTIMATE.start_main_~i~0 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32)))) (let ((.cse45 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse47))) (let ((.cse46 (select .cse45 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse43 (select .cse47 c_ULTIMATE.start_main_~a~0.offset)) (.cse44 (select .cse46 |c_ULTIMATE.start_main_~#sum~0.offset|))) (let ((.cse41 (select (select (store .cse45 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse46 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse43 .cse44))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse42 (select (select (store .cse45 |c_ULTIMATE.start_main_~#sum~0.base| (store .cse46 |c_ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse41 .cse43 .cse44))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~a~0.offset)))) (or (not (= .cse41 (_ bv1 32))) (= c_~N~0 (bvadd .cse42 .cse41 .cse43 .cse44)) (not (= .cse42 (_ bv1 32))) (not (= .cse43 (_ bv1 32))))))))))) .cse11) .cse12)))))) is different from true [2021-11-02 22:48:31,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:31,444 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-11-02 22:48:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 22:48:31,446 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 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) Word has length 26 [2021-11-02 22:48:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:31,446 INFO L225 Difference]: With dead ends: 53 [2021-11-02 22:48:31,446 INFO L226 Difference]: Without dead ends: 47 [2021-11-02 22:48:31,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 71.5s TimeCoverageRelationStatistics Valid=715, Invalid=3972, Unknown=13, NotChecked=270, Total=4970 [2021-11-02 22:48:31,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-02 22:48:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2021-11-02 22:48:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 22:48:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-02 22:48:31,455 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 26 [2021-11-02 22:48:31,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:31,455 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-02 22:48:31,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 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 22:48:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-02 22:48:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:48:31,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:31,456 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:31,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:31,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:48:31,658 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:31,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 2 times [2021-11-02 22:48:31,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:48:31,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107144903] [2021-11-02 22:48:31,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:48:31,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:48:31,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:48:31,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:48:31,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 22:48:32,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:48:32,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:32,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:48:32,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:32,044 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 12 treesize of output 10 [2021-11-02 22:48:32,219 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 13 treesize of output 9 [2021-11-02 22:48:32,445 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:48:32,445 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 1 case distinctions, treesize of input 35 treesize of output 33 [2021-11-02 22:48:32,697 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-11-02 22:48:32,698 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 5 case distinctions, treesize of input 39 treesize of output 37 [2021-11-02 22:48:32,857 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 7 [2021-11-02 22:48:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:32,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:48:35,504 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| (_ BitVec 32))) (= (let ((.cse3 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (let ((.cse1 (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|)) (.cse2 (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse3 c_ULTIMATE.start_main_~a~0.offset)))) (bvadd (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse1 .cse2))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) .cse3 c_ULTIMATE.start_main_~a~0.offset)) .cse1 .cse2))))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) .cse3 c_ULTIMATE.start_main_~a~0.offset))) (_ bv1 32))) is different from false [2021-11-02 22:48:45,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:48:45,544 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 1486 treesize of output 1378 [2021-11-02 22:49:26,119 INFO L354 Elim1Store]: treesize reduction 32, result has 47.5 percent of original size [2021-11-02 22:49:26,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 170 [2021-11-02 22:49:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-02 22:49:27,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:49:27,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107144903] [2021-11-02 22:49:27,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107144903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:49:27,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:49:27,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-11-02 22:49:27,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006402605] [2021-11-02 22:49:27,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:49:27,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:49:27,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:49:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=4, NotChecked=34, Total=380 [2021-11-02 22:49:27,104 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 22:49:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:31,678 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-11-02 22:49:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:49:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 22:49:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:31,680 INFO L225 Difference]: With dead ends: 47 [2021-11-02 22:49:31,680 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 22:49:31,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=90, Invalid=461, Unknown=5, NotChecked=44, Total=600 [2021-11-02 22:49:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 22:49:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-02 22:49:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 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 22:49:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-02 22:49:31,688 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 26 [2021-11-02 22:49:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:31,688 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-02 22:49:31,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 22:49:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-02 22:49:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:49:31,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:31,690 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:31,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:49:31,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:49:31,894 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:31,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1421579903, now seen corresponding path program 3 times [2021-11-02 22:49:31,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:49:31,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352298744] [2021-11-02 22:49:31,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:49:31,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:49:31,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:49:31,896 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:49:31,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 22:49:32,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 22:49:32,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:49:32,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:49:32,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:33,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:49:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:34,817 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:49:34,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352298744] [2021-11-02 22:49:34,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352298744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:49:34,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:49:34,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-11-02 22:49:34,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360193811] [2021-11-02 22:49:34,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:49:34,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:49:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:49:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:49:34,819 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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 22:49:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:37,417 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-11-02 22:49:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:49:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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 29 [2021-11-02 22:49:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:37,418 INFO L225 Difference]: With dead ends: 70 [2021-11-02 22:49:37,418 INFO L226 Difference]: Without dead ends: 43 [2021-11-02 22:49:37,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:49:37,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-02 22:49:37,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-11-02 22:49:37,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-02 22:49:37,426 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 29 [2021-11-02 22:49:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:37,427 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-02 22:49:37,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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 22:49:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-02 22:49:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:49:37,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:37,428 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:37,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:49:37,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:49:37,644 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:37,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:37,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1961716541, now seen corresponding path program 4 times [2021-11-02 22:49:37,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:49:37,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957478244] [2021-11-02 22:49:37,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:49:37,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:49:37,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:49:37,646 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:49:37,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 22:49:38,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:49:38,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:49:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:49:38,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:38,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-02 22:49:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:49:38,552 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:49:38,553 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 1 case distinctions, treesize of input 35 treesize of output 33 [2021-11-02 22:49:38,705 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:49:38,705 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 1 case distinctions, treesize of input 35 treesize of output 33 [2021-11-02 22:49:38,998 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-11-02 22:49:38,998 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 5 case distinctions, treesize of input 39 treesize of output 37 [2021-11-02 22:49:39,214 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 7 [2021-11-02 22:49:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:39,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:49:42,593 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| (_ BitVec 32))) (= (let ((.cse4 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (let ((.cse2 (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|)) (.cse3 (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse4 c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse2 .cse3))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) .cse4 c_ULTIMATE.start_main_~a~0.offset)))) (bvadd (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse1 .cse2 .cse3))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) .cse4 c_ULTIMATE.start_main_~a~0.offset)) .cse1 .cse2 .cse3)))))) c_ULTIMATE.start_main_~a~0.base) (bvadd .cse4 c_ULTIMATE.start_main_~a~0.offset (_ bv12 32)))) (_ bv1 32))) is different from false [2021-11-02 22:49:44,718 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (let ((.cse2 (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|)) (.cse3 (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse2 .cse3))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)))) (bvadd .cse1 .cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse1 .cse2 .cse3))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~a~0.offset)) .cse3)))))) c_ULTIMATE.start_main_~a~0.base) (bvadd c_ULTIMATE.start_main_~a~0.offset (_ bv12 32))) (_ bv1 32))) is different from false [2021-11-02 22:49:44,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:49:44,853 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 4569 treesize of output 4159 [2021-11-02 22:55:16,587 INFO L354 Elim1Store]: treesize reduction 66, result has 37.1 percent of original size [2021-11-02 22:55:16,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 271 treesize of output 237 [2021-11-02 22:55:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2021-11-02 22:55:28,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:28,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957478244] [2021-11-02 22:55:28,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957478244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:55:28,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:55:28,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-11-02 22:55:28,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288196051] [2021-11-02 22:55:28,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:55:28,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:28,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:55:28,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=444, Unknown=2, NotChecked=86, Total=600 [2021-11-02 22:55:28,999 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:38,492 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-02 22:55:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:55:38,493 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-02 22:55:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:38,494 INFO L225 Difference]: With dead ends: 49 [2021-11-02 22:55:38,494 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 22:55:38,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=105, Invalid=712, Unknown=3, NotChecked=110, Total=930 [2021-11-02 22:55:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 22:55:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-02 22:55:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 22:55:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-02 22:55:38,502 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 31 [2021-11-02 22:55:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:38,503 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-02 22:55:38,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-02 22:55:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:55:38,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:38,504 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:38,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:38,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:38,713 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:55:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1038743711, now seen corresponding path program 5 times [2021-11-02 22:55:38,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:38,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097432579] [2021-11-02 22:55:38,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:55:38,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:38,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:38,716 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:38,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 22:55:39,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 22:55:39,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:55:39,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:55:39,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:40,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:43,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:43,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097432579] [2021-11-02 22:55:43,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097432579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:55:43,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:55:43,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-11-02 22:55:43,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056968089] [2021-11-02 22:55:43,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 22:55:43,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:43,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 22:55:43,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:55:43,211 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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 22:55:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:47,225 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-11-02 22:55:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:55:47,226 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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 34 [2021-11-02 22:55:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:47,227 INFO L225 Difference]: With dead ends: 72 [2021-11-02 22:55:47,227 INFO L226 Difference]: Without dead ends: 45 [2021-11-02 22:55:47,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=432, Invalid=1638, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:55:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-02 22:55:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-11-02 22:55:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:55:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-02 22:55:47,233 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2021-11-02 22:55:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:47,234 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-02 22:55:47,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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 22:55:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-02 22:55:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:55:47,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:47,235 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:47,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:47,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:47,438 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:55:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash -539064675, now seen corresponding path program 6 times [2021-11-02 22:55:47,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:47,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245227318] [2021-11-02 22:55:47,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:55:47,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:47,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:47,440 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:47,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f83fa369-9e54-4909-b9e5-baa2f63ecde6/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 22:55:47,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 22:55:47,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:55:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:55:47,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:47,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-02 22:55:48,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:55:48,555 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:55:48,555 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 1 case distinctions, treesize of input 35 treesize of output 33 [2021-11-02 22:55:48,727 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:55:48,728 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 1 case distinctions, treesize of input 35 treesize of output 33 [2021-11-02 22:55:48,896 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:55:48,898 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 1 case distinctions, treesize of input 35 treesize of output 33 [2021-11-02 22:55:49,172 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-11-02 22:55:49,172 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 5 case distinctions, treesize of input 39 treesize of output 37 [2021-11-02 22:55:49,372 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 7 [2021-11-02 22:55:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:49,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:54,330 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| (_ BitVec 32))) (= (let ((.cse5 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (let ((.cse3 (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|)) (.cse4 (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse5 c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse3 .cse4))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) .cse5 c_ULTIMATE.start_main_~a~0.offset)))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse2 .cse3 .cse4))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv8 32) .cse5 c_ULTIMATE.start_main_~a~0.offset)))) (bvadd .cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (bvadd .cse1 .cse2 .cse3 .cse4))) c_ULTIMATE.start_main_~a~0.base) (bvadd .cse5 c_ULTIMATE.start_main_~a~0.offset (_ bv12 32))) .cse2 .cse3 .cse4))))))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv16 32) .cse5 c_ULTIMATE.start_main_~a~0.offset))) (_ bv1 32))) is different from false [2021-11-02 22:56:23,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:56:23,094 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 30463 treesize of output 27433