./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF --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 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:52:30,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:52:30,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:52:30,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:52:30,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:52:30,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:52:30,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:52:30,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:52:30,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:52:30,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:52:30,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:52:30,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:52:30,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:52:30,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:52:30,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:52:30,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:52:30,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:52:30,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:52:30,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:52:30,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:52:30,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:52:30,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:52:30,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:52:30,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:52:30,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:52:30,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:52:30,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:52:30,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:52:30,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:52:30,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:52:30,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:52:30,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:52:30,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:52:30,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:52:30,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:52:30,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:52:30,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:52:30,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:52:31,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:52:31,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:52:31,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:52:31,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:52:31,030 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:52:31,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:52:31,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:52:31,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:52:31,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:52:31,031 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:52:31,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:52:31,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:52:31,032 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:52:31,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:52:31,033 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:52:31,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:52:31,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:52:31,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:52:31,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:52:31,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:52:31,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:52:31,034 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:52:31,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:52:31,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:52:31,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:52:31,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:52:31,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:52:31,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:52:31,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:52:31,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:52:31,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:52:31,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:52:31,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:52:31,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:52:31,037 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:52:31,037 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:52:31,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:52:31,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:52:31,038 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_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 [2021-11-20 05:52:31,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:52:31,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:52:31,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:52:31,403 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:52:31,405 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:52:31,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-crafted/zero_sum1.c [2021-11-20 05:52:31,468 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/data/146859606/a3de21828b9c4886aece055ed49d03a1/FLAGbc2bcece4 [2021-11-20 05:52:31,918 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:52:31,918 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/sv-benchmarks/c/array-crafted/zero_sum1.c [2021-11-20 05:52:31,927 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/data/146859606/a3de21828b9c4886aece055ed49d03a1/FLAGbc2bcece4 [2021-11-20 05:52:32,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/data/146859606/a3de21828b9c4886aece055ed49d03a1 [2021-11-20 05:52:32,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:52:32,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:52:32,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:52:32,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:52:32,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:52:32,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec27939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32, skipping insertion in model container [2021-11-20 05:52:32,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:52:32,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:52:32,515 WARN L230 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_bc41fdd0-fae9-453d-abae-34dcb155c4d5/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2021-11-20 05:52:32,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:52:32,533 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:52:32,545 WARN L230 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_bc41fdd0-fae9-453d-abae-34dcb155c4d5/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2021-11-20 05:52:32,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:52:32,564 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:52:32,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32 WrapperNode [2021-11-20 05:52:32,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:52:32,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:52:32,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:52:32,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:52:32,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,598 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2021-11-20 05:52:32,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:52:32,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:52:32,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:52:32,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:52:32,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:52:32,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:52:32,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:52:32,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:52:32,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (1/1) ... [2021-11-20 05:52:32,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:52:32,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:32,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:52:32,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:52:32,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:52:32,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:52:32,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:52:32,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:52:32,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:52:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:52:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:52:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:52:32,750 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:52:32,752 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:52:32,860 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:52:32,865 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:52:32,865 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 05:52:32,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:52:32 BoogieIcfgContainer [2021-11-20 05:52:32,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:52:32,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:52:32,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:52:32,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:52:32,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:52:32" (1/3) ... [2021-11-20 05:52:32,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28849544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:52:32, skipping insertion in model container [2021-11-20 05:52:32,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:32" (2/3) ... [2021-11-20 05:52:32,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28849544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:52:32, skipping insertion in model container [2021-11-20 05:52:32,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:52:32" (3/3) ... [2021-11-20 05:52:32,882 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2021-11-20 05:52:32,888 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:52:32,888 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:52:32,940 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:52:32,947 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 [2021-11-20 05:52:32,947 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:52:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 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) [2021-11-20 05:52:32,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:52:32,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:32,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:32,968 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2021-11-20 05:52:32,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:32,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168680522] [2021-11-20 05:52:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:32,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:33,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:33,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168680522] [2021-11-20 05:52:33,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168680522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:33,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:33,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:52:33,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299628188] [2021-11-20 05:52:33,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:33,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:52:33,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:33,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:52:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:52:33,148 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 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) 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) [2021-11-20 05:52:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:33,163 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-20 05:52:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:52:33,165 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 [2021-11-20 05:52:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:33,173 INFO L225 Difference]: With dead ends: 35 [2021-11-20 05:52:33,173 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 05:52:33,176 INFO L932 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 [2021-11-20 05:52:33,180 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:33,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:52:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 05:52:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-20 05:52:33,209 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) [2021-11-20 05:52:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-20 05:52:33,211 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-20 05:52:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:33,212 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-20 05:52:33,212 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) [2021-11-20 05:52:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-20 05:52:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:52:33,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:33,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:33,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:52:33,214 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:33,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2021-11-20 05:52:33,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:33,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051503775] [2021-11-20 05:52:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:33,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:33,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:33,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051503775] [2021-11-20 05:52:33,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051503775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:33,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:33,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:52:33,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567521905] [2021-11-20 05:52:33,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:33,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:52:33,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:52:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:52:33,292 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-20 05:52:33,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:33,317 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-11-20 05:52:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:52:33,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-11-20 05:52:33,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:33,319 INFO L225 Difference]: With dead ends: 27 [2021-11-20 05:52:33,319 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 05:52:33,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:52:33,321 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:33,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:52:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 05:52:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-20 05:52:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-20 05:52:33,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-11-20 05:52:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:33,342 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-20 05:52:33,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-20 05:52:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-20 05:52:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:52:33,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:33,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:33,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:52:33,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:33,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:33,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2117745282, now seen corresponding path program 1 times [2021-11-20 05:52:33,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:33,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035296936] [2021-11-20 05:52:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:33,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:52:33,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:33,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035296936] [2021-11-20 05:52:33,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035296936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:33,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:33,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:33,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353624638] [2021-11-20 05:52:33,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:33,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:33,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:33,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:33,406 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:33,447 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-11-20 05:52:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:33,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-20 05:52:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:33,455 INFO L225 Difference]: With dead ends: 27 [2021-11-20 05:52:33,455 INFO L226 Difference]: Without dead ends: 20 [2021-11-20 05:52:33,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:33,457 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:33,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:52:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-20 05:52:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-20 05:52:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2021-11-20 05:52:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-20 05:52:33,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-11-20 05:52:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:33,477 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-20 05:52:33,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:33,478 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-20 05:52:33,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:52:33,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:33,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:33,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:52:33,479 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash -350467326, now seen corresponding path program 1 times [2021-11-20 05:52:33,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:33,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314941424] [2021-11-20 05:52:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:33,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:52:33,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:33,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314941424] [2021-11-20 05:52:33,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314941424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:33,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960636950] [2021-11-20 05:52:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:33,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:33,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:33,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:52:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:52:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:52:33,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:52:33,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960636950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:33,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:33,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 05:52:33,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262982197] [2021-11-20 05:52:33,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:33,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:52:33,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:52:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:52:33,852 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:33,883 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-20 05:52:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:52:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 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 17 [2021-11-20 05:52:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:33,885 INFO L225 Difference]: With dead ends: 33 [2021-11-20 05:52:33,885 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 05:52:33,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:52:33,887 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:33,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 29 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:52:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 05:52:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-20 05:52:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-20 05:52:33,893 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-11-20 05:52:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:33,894 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-20 05:52:33,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-20 05:52:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 05:52:33,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:33,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:33,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:34,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:34,121 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:34,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:34,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924836, now seen corresponding path program 2 times [2021-11-20 05:52:34,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:34,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643637841] [2021-11-20 05:52:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:34,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:52:34,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:34,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643637841] [2021-11-20 05:52:34,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643637841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:34,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226813767] [2021-11-20 05:52:34,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:52:34,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:34,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:34,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:34,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:52:34,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:52:34,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:52:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:52:34,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:52:34,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226813767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:34,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:34,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-20 05:52:34,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807477789] [2021-11-20 05:52:34,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:34,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:52:34,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:34,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:52:34,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:52:34,515 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:34,582 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-20 05:52:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:52:34,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2021-11-20 05:52:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:34,584 INFO L225 Difference]: With dead ends: 34 [2021-11-20 05:52:34,584 INFO L226 Difference]: Without dead ends: 26 [2021-11-20 05:52:34,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:52:34,586 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:34,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:52:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-20 05:52:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-20 05:52:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2021-11-20 05:52:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-20 05:52:34,592 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2021-11-20 05:52:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:34,592 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-20 05:52:34,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-20 05:52:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 05:52:34,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:34,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:34,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:34,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:34,809 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:34,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:34,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 3 times [2021-11-20 05:52:34,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:34,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473959447] [2021-11-20 05:52:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:34,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:35,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473959447] [2021-11-20 05:52:35,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473959447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:35,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607866035] [2021-11-20 05:52:35,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:52:35,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:35,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:35,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:35,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:52:35,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:52:35,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 05:52:35,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:35,678 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 [2021-11-20 05:52:36,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:52:36,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-20 05:52:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:36,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:38,917 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 89 treesize of output 81 [2021-11-20 05:52:38,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:52:38,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 231 [2021-11-20 05:52:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:39,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607866035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:39,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:39,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 20] total 47 [2021-11-20 05:52:39,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456332410] [2021-11-20 05:52:39,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:39,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 05:52:39,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:39,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 05:52:39,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 05:52:39,460 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:41,212 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-11-20 05:52:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 05:52:41,214 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 05:52:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:41,216 INFO L225 Difference]: With dead ends: 64 [2021-11-20 05:52:41,216 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 05:52:41,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=570, Invalid=4542, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 05:52:41,220 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:41,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 79 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 233 Invalid, 0 Unknown, 219 Unchecked, 0.2s Time] [2021-11-20 05:52:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 05:52:41,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2021-11-20 05:52:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 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) [2021-11-20 05:52:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-11-20 05:52:41,230 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 23 [2021-11-20 05:52:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:41,231 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-11-20 05:52:41,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-11-20 05:52:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:52:41,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:41,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:41,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:41,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:41,458 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:41,458 INFO L85 PathProgramCache]: Analyzing trace with hash -732186678, now seen corresponding path program 4 times [2021-11-20 05:52:41,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:41,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903057513] [2021-11-20 05:52:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:41,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:52:41,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:41,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903057513] [2021-11-20 05:52:41,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903057513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:41,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208180959] [2021-11-20 05:52:41,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:52:41,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:41,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:41,533 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:41,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:52:41,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:52:41,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:41,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:52:41,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:52:41,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:52:41,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208180959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:41,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:41,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-20 05:52:41,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019369066] [2021-11-20 05:52:41,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:41,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:52:41,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:41,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:52:41,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:52:41,819 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) [2021-11-20 05:52:41,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:41,969 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-11-20 05:52:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:52:41,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) Word has length 25 [2021-11-20 05:52:41,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:41,972 INFO L225 Difference]: With dead ends: 65 [2021-11-20 05:52:41,972 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 05:52:41,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:52:41,974 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:41,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:52:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 05:52:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-20 05:52:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 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) [2021-11-20 05:52:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-20 05:52:41,982 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 25 [2021-11-20 05:52:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:41,982 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-20 05:52:41,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) [2021-11-20 05:52:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-20 05:52:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:52:41,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:41,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:42,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:42,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:42,209 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:42,209 INFO L85 PathProgramCache]: Analyzing trace with hash 368620396, now seen corresponding path program 5 times [2021-11-20 05:52:42,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:42,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324331992] [2021-11-20 05:52:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:42,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:52:42,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:42,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324331992] [2021-11-20 05:52:42,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324331992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:42,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987285924] [2021-11-20 05:52:42,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:52:42,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:42,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:42,310 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:42,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:52:42,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 05:52:42,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:42,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:52:42,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:52:42,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:52:42,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987285924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:42,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:42,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-20 05:52:42,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233215624] [2021-11-20 05:52:42,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:42,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:52:42,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:42,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:52:42,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:52:42,595 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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) [2021-11-20 05:52:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:42,793 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-11-20 05:52:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:52:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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) Word has length 27 [2021-11-20 05:52:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:42,794 INFO L225 Difference]: With dead ends: 57 [2021-11-20 05:52:42,794 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 05:52:42,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-11-20 05:52:42,796 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:42,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 41 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:52:42,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 05:52:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-11-20 05:52:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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) [2021-11-20 05:52:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-20 05:52:42,803 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-11-20 05:52:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:42,803 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-20 05:52:42,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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) [2021-11-20 05:52:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-20 05:52:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 05:52:42,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:42,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:42,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:43,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:43,013 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:43,014 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 6 times [2021-11-20 05:52:43,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:43,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691294182] [2021-11-20 05:52:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:43,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:43,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691294182] [2021-11-20 05:52:43,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691294182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433249672] [2021-11-20 05:52:43,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:52:43,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:43,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:43,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:43,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:52:43,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 05:52:43,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:43,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 05:52:43,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:44,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:45,595 INFO L354 Elim1Store]: treesize reduction 87, result has 57.8 percent of original size [2021-11-20 05:52:45,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 151 [2021-11-20 05:52:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:48,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433249672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:48,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:48,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 51 [2021-11-20 05:52:48,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756487998] [2021-11-20 05:52:48,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:48,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 05:52:48,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:48,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 05:52:48,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2292, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 05:52:48,010 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:48,749 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-11-20 05:52:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 05:52:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-20 05:52:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:48,750 INFO L225 Difference]: With dead ends: 47 [2021-11-20 05:52:48,750 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 05:52:48,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=378, Invalid=3282, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 05:52:48,753 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:48,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 53 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 460 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2021-11-20 05:52:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 05:52:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-11-20 05:52:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-11-20 05:52:48,759 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2021-11-20 05:52:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:48,760 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-11-20 05:52:48,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-11-20 05:52:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 05:52:48,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:48,761 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:48,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:48,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:48,977 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash 326484464, now seen corresponding path program 7 times [2021-11-20 05:52:48,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:48,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169064736] [2021-11-20 05:52:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:48,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:52:49,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:49,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169064736] [2021-11-20 05:52:49,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169064736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:49,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725584247] [2021-11-20 05:52:49,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:52:49,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:49,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:49,068 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:49,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:52:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:52:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:52:49,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:52:49,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725584247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:49,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:49,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-20 05:52:49,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599920379] [2021-11-20 05:52:49,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:49,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:52:49,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:49,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:52:49,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:52:49,314 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-11-20 05:52:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:49,438 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-11-20 05:52:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:52:49,439 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 31 [2021-11-20 05:52:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:49,439 INFO L225 Difference]: With dead ends: 68 [2021-11-20 05:52:49,439 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 05:52:49,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:52:49,441 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:49,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:52:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 05:52:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-20 05:52:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-11-20 05:52:49,448 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 31 [2021-11-20 05:52:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:49,448 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-11-20 05:52:49,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-11-20 05:52:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-11-20 05:52:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:52:49,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:49,450 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:49,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:49,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:52:49,672 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:49,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:49,673 INFO L85 PathProgramCache]: Analyzing trace with hash -438567918, now seen corresponding path program 8 times [2021-11-20 05:52:49,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:49,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969167787] [2021-11-20 05:52:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:49,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:52:49,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:49,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969167787] [2021-11-20 05:52:49,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969167787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:49,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729261421] [2021-11-20 05:52:49,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:52:49,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:49,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:49,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:49,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:52:49,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:52:49,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:49,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:52:49,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:52:49,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:52:50,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729261421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:50,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:50,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-20 05:52:50,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988314365] [2021-11-20 05:52:50,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:50,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:52:50,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:50,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:52:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:52:50,065 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-11-20 05:52:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:50,223 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-11-20 05:52:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:52:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 33 [2021-11-20 05:52:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:50,225 INFO L225 Difference]: With dead ends: 52 [2021-11-20 05:52:50,225 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 05:52:50,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:52:50,227 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:50,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 35 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:52:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 05:52:50,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-11-20 05:52:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-20 05:52:50,233 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2021-11-20 05:52:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:50,234 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-20 05:52:50,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-11-20 05:52:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-20 05:52:50,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 05:52:50,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:50,235 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:50,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:50,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 05:52:50,449 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash -827015692, now seen corresponding path program 9 times [2021-11-20 05:52:50,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:50,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079280425] [2021-11-20 05:52:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:50,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:51,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:51,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079280425] [2021-11-20 05:52:51,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079280425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:51,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632585340] [2021-11-20 05:52:51,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:52:51,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:51,464 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:51,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:52:51,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 05:52:51,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:51,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 05:52:51,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:52,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:52:52,767 INFO L354 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2021-11-20 05:52:52,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 55 [2021-11-20 05:52:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:52:53,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:56,025 INFO L354 Elim1Store]: treesize reduction 283, result has 33.9 percent of original size [2021-11-20 05:52:56,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 169 treesize of output 191 [2021-11-20 05:52:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:52:56,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632585340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:56,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:56,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 23] total 67 [2021-11-20 05:52:56,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155025668] [2021-11-20 05:52:56,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:56,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-20 05:52:56,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:56,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-20 05:52:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=4087, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 05:52:56,959 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 67 states, 67 states have (on average 1.328358208955224) internal successors, (89), 67 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:59,147 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-11-20 05:52:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 05:52:59,147 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.328358208955224) internal successors, (89), 67 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-20 05:52:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:59,148 INFO L225 Difference]: With dead ends: 54 [2021-11-20 05:52:59,148 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 05:52:59,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=691, Invalid=8621, Unknown=0, NotChecked=0, Total=9312 [2021-11-20 05:52:59,151 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:59,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 97 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 469 Invalid, 0 Unknown, 302 Unchecked, 0.3s Time] [2021-11-20 05:52:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 05:52:59,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-11-20 05:52:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 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) [2021-11-20 05:52:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-20 05:52:59,159 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2021-11-20 05:52:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:59,160 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-20 05:52:59,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.328358208955224) internal successors, (89), 67 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-20 05:52:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:52:59,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:59,161 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:59,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:59,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 05:52:59,373 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash -139896938, now seen corresponding path program 10 times [2021-11-20 05:52:59,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:59,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884870333] [2021-11-20 05:52:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:59,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:52:59,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:59,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884870333] [2021-11-20 05:52:59,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884870333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:52:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331915106] [2021-11-20 05:52:59,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:52:59,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:52:59,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:59,478 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:52:59,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:52:59,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:52:59,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:52:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:52:59,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:52:59,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331915106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:59,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:52:59,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-20 05:52:59,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213346816] [2021-11-20 05:52:59,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:59,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:52:59,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:52:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:52:59,790 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 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) [2021-11-20 05:52:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:59,926 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-11-20 05:52:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:52:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 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) Word has length 37 [2021-11-20 05:52:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:59,927 INFO L225 Difference]: With dead ends: 80 [2021-11-20 05:52:59,927 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 05:52:59,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:52:59,928 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:59,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 42 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:52:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 05:52:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-20 05:52:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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) [2021-11-20 05:52:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-11-20 05:52:59,936 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 37 [2021-11-20 05:52:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:59,936 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-11-20 05:52:59,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 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) [2021-11-20 05:52:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-11-20 05:52:59,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 05:52:59,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:59,938 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:59,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:00,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:53:00,147 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:00,147 INFO L85 PathProgramCache]: Analyzing trace with hash 361754680, now seen corresponding path program 11 times [2021-11-20 05:53:00,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:00,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795531626] [2021-11-20 05:53:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:00,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:53:00,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:00,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795531626] [2021-11-20 05:53:00,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795531626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:00,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663239440] [2021-11-20 05:53:00,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:53:00,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:00,254 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:00,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:53:00,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 05:53:00,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:00,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:53:00,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:53:00,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:53:00,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663239440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:00,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:00,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-11-20 05:53:00,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73112747] [2021-11-20 05:53:00,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:00,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:53:00,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:00,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:53:00,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-11-20 05:53:00,736 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:00,966 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-20 05:53:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:53:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-20 05:53:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:00,967 INFO L225 Difference]: With dead ends: 60 [2021-11-20 05:53:00,967 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 05:53:00,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 05:53:00,969 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 94 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:00,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 40 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 05:53:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-11-20 05:53:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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) [2021-11-20 05:53:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-11-20 05:53:00,976 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2021-11-20 05:53:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:00,977 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-11-20 05:53:00,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-11-20 05:53:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:53:00,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:00,978 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:01,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:01,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 05:53:01,193 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:01,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1622323046, now seen corresponding path program 12 times [2021-11-20 05:53:01,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:01,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539644348] [2021-11-20 05:53:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:01,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:02,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:02,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539644348] [2021-11-20 05:53:02,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539644348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:02,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026015624] [2021-11-20 05:53:02,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:53:02,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:02,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:02,412 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:02,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:53:02,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 05:53:02,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 05:53:02,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:02,552 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 [2021-11-20 05:53:03,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:03,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-20 05:53:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:53:04,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:53:09,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026015624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:09,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:09,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 27] total 80 [2021-11-20 05:53:09,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214739555] [2021-11-20 05:53:09,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:09,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-20 05:53:09,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-20 05:53:09,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=5949, Unknown=0, NotChecked=0, Total=6320 [2021-11-20 05:53:09,030 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:12,034 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-20 05:53:12,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 05:53:12,034 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 05:53:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:12,035 INFO L225 Difference]: With dead ends: 62 [2021-11-20 05:53:12,035 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 05:53:12,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=749, Invalid=12133, Unknown=0, NotChecked=0, Total=12882 [2021-11-20 05:53:12,039 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:12,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 124 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 664 Invalid, 0 Unknown, 615 Unchecked, 0.4s Time] [2021-11-20 05:53:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 05:53:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-11-20 05:53:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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) [2021-11-20 05:53:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-11-20 05:53:12,049 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2021-11-20 05:53:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:12,049 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-11-20 05:53:12,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-11-20 05:53:12,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 05:53:12,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:12,051 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:12,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:12,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:12,269 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash 73914556, now seen corresponding path program 13 times [2021-11-20 05:53:12,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:12,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680294362] [2021-11-20 05:53:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:12,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:53:12,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:12,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680294362] [2021-11-20 05:53:12,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680294362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:12,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786071215] [2021-11-20 05:53:12,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:53:12,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:12,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:12,378 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:12,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:53:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:12,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:53:12,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:53:12,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:53:12,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786071215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:12,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:12,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-20 05:53:12,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333218642] [2021-11-20 05:53:12,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:12,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:53:12,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:12,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:53:12,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:53:12,738 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:12,924 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2021-11-20 05:53:12,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:53:12,925 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-20 05:53:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:12,926 INFO L225 Difference]: With dead ends: 92 [2021-11-20 05:53:12,926 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 05:53:12,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:53:12,927 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:12,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 49 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 05:53:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-20 05:53:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 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) [2021-11-20 05:53:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-11-20 05:53:12,939 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2021-11-20 05:53:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:12,939 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-11-20 05:53:12,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-11-20 05:53:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 05:53:12,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:12,941 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:12,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:13,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 05:53:13,145 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash -894570530, now seen corresponding path program 14 times [2021-11-20 05:53:13,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:13,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219978711] [2021-11-20 05:53:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:13,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:53:13,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:13,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219978711] [2021-11-20 05:53:13,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219978711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:13,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783519758] [2021-11-20 05:53:13,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:53:13,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:13,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:13,277 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:13,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:53:13,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:53:13,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:13,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:53:13,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:53:13,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:53:13,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783519758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:13,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:13,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-20 05:53:13,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106939459] [2021-11-20 05:53:13,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:13,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:53:13,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:53:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:53:13,624 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:13,853 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-11-20 05:53:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:53:13,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-20 05:53:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:13,854 INFO L225 Difference]: With dead ends: 68 [2021-11-20 05:53:13,854 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 05:53:13,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:53:13,855 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 119 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:13,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 27 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 05:53:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-11-20 05:53:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 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) [2021-11-20 05:53:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-11-20 05:53:13,864 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2021-11-20 05:53:13,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:13,864 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-11-20 05:53:13,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-11-20 05:53:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 05:53:13,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:13,866 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:13,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:14,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 05:53:14,073 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash 49745600, now seen corresponding path program 15 times [2021-11-20 05:53:14,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:14,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510135544] [2021-11-20 05:53:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:14,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:15,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:15,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510135544] [2021-11-20 05:53:15,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510135544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:15,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902365248] [2021-11-20 05:53:15,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:53:15,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:15,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:15,680 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:15,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:53:15,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 05:53:15,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:15,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-20 05:53:15,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:15,834 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 [2021-11-20 05:53:19,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:19,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:19,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:19,613 INFO L354 Elim1Store]: treesize reduction 98, result has 44.6 percent of original size [2021-11-20 05:53:19,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 97 [2021-11-20 05:53:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 7 proven. 92 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:53:19,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:53:26,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902365248] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:26,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:26,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34, 31] total 93 [2021-11-20 05:53:26,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012357161] [2021-11-20 05:53:26,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:26,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-20 05:53:26,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:26,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-20 05:53:26,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=8042, Unknown=0, NotChecked=0, Total=8556 [2021-11-20 05:53:26,655 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:31,507 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-11-20 05:53:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 05:53:31,508 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-20 05:53:31,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:31,509 INFO L225 Difference]: With dead ends: 69 [2021-11-20 05:53:31,509 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 05:53:31,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3637 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1070, Invalid=17020, Unknown=0, NotChecked=0, Total=18090 [2021-11-20 05:53:31,511 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:31,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 133 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 854 Invalid, 0 Unknown, 727 Unchecked, 0.6s Time] [2021-11-20 05:53:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 05:53:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-11-20 05:53:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-11-20 05:53:31,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2021-11-20 05:53:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:31,521 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-11-20 05:53:31,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-11-20 05:53:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 05:53:31,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:31,523 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:31,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:31,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 05:53:31,725 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:31,725 INFO L85 PathProgramCache]: Analyzing trace with hash 614114658, now seen corresponding path program 16 times [2021-11-20 05:53:31,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:31,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484385875] [2021-11-20 05:53:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:31,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:53:31,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:31,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484385875] [2021-11-20 05:53:31,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484385875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:31,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548763619] [2021-11-20 05:53:31,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:53:31,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:31,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:31,876 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:31,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:53:31,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:53:31,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:31,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:53:31,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:53:32,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:53:32,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548763619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:32,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:32,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-20 05:53:32,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969690437] [2021-11-20 05:53:32,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:32,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 05:53:32,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 05:53:32,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:53:32,228 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:32,419 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-11-20 05:53:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:53:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-20 05:53:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:32,420 INFO L225 Difference]: With dead ends: 104 [2021-11-20 05:53:32,420 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 05:53:32,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:53:32,420 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:32,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 05:53:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-20 05:53:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-11-20 05:53:32,432 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 49 [2021-11-20 05:53:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:32,432 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-11-20 05:53:32,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-11-20 05:53:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 05:53:32,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:32,434 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:32,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:32,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:32,649 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:32,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1413962500, now seen corresponding path program 17 times [2021-11-20 05:53:32,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:32,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612977759] [2021-11-20 05:53:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:32,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 05:53:32,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:32,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612977759] [2021-11-20 05:53:32,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612977759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:32,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880483621] [2021-11-20 05:53:32,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:53:32,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:32,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:32,802 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:32,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:53:32,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 05:53:32,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:32,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:53:32,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 05:53:33,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 05:53:33,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880483621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:33,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:33,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2021-11-20 05:53:33,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511821969] [2021-11-20 05:53:33,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:33,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 05:53:33,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 05:53:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 05:53:33,358 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:33,733 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-11-20 05:53:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:53:33,734 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 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 51 [2021-11-20 05:53:33,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:33,735 INFO L225 Difference]: With dead ends: 76 [2021-11-20 05:53:33,735 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 05:53:33,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 05:53:33,736 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 117 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:33,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 54 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:53:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 05:53:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-11-20 05:53:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-20 05:53:33,746 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2021-11-20 05:53:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:33,746 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-20 05:53:33,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-20 05:53:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 05:53:33,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:33,748 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:33,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:33,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:33,961 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:33,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1158981530, now seen corresponding path program 18 times [2021-11-20 05:53:33,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:33,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812728690] [2021-11-20 05:53:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:33,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:35,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:35,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812728690] [2021-11-20 05:53:35,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812728690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:35,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765581060] [2021-11-20 05:53:35,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:53:35,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:35,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:35,951 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:35,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 05:53:36,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-20 05:53:36,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 05:53:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:39,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:39,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:39,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:39,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:39,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:39,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:39,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:39,887 INFO L354 Elim1Store]: treesize reduction 332, result has 37.7 percent of original size [2021-11-20 05:53:39,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 99 treesize of output 223 [2021-11-20 05:53:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 98 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:53:40,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:47,902 INFO L354 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2021-11-20 05:53:47,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 289 treesize of output 371 [2021-11-20 05:54:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:54:03,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765581060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:03,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:54:03,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 35] total 105 [2021-11-20 05:54:03,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823672804] [2021-11-20 05:54:03,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:03,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-20 05:54:03,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:03,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-20 05:54:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=10257, Unknown=0, NotChecked=0, Total=10920 [2021-11-20 05:54:03,690 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:11,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:11,371 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-11-20 05:54:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-20 05:54:11,372 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-20 05:54:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:11,372 INFO L225 Difference]: With dead ends: 76 [2021-11-20 05:54:11,372 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 05:54:11,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4044 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=1330, Invalid=21622, Unknown=0, NotChecked=0, Total=22952 [2021-11-20 05:54:11,375 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 900 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:11,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1309 Invalid, 0 Unknown, 900 Unchecked, 0.8s Time] [2021-11-20 05:54:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 05:54:11,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-11-20 05:54:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-11-20 05:54:11,386 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2021-11-20 05:54:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:11,386 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-11-20 05:54:11,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-11-20 05:54:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 05:54:11,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:11,388 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:11,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-20 05:54:11,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:11,593 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1331487352, now seen corresponding path program 19 times [2021-11-20 05:54:11,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:11,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608458895] [2021-11-20 05:54:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:11,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 05:54:11,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:11,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608458895] [2021-11-20 05:54:11,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608458895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:11,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211301330] [2021-11-20 05:54:11,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:54:11,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:11,761 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:11,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 05:54:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:11,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:54:11,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 05:54:12,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 05:54:12,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211301330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:12,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:54:12,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-20 05:54:12,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477386473] [2021-11-20 05:54:12,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:12,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:54:12,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:12,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:54:12,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-11-20 05:54:12,244 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:12,497 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-11-20 05:54:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 05:54:12,498 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-20 05:54:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:12,498 INFO L225 Difference]: With dead ends: 116 [2021-11-20 05:54:12,499 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 05:54:12,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 05:54:12,500 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:12,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 42 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:54:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 05:54:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-20 05:54:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-11-20 05:54:12,508 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 55 [2021-11-20 05:54:12,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:12,509 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-11-20 05:54:12,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-11-20 05:54:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 05:54:12,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:12,510 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:12,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:12,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 05:54:12,717 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:12,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1327132246, now seen corresponding path program 20 times [2021-11-20 05:54:12,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:12,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691944299] [2021-11-20 05:54:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:12,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:54:12,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:12,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691944299] [2021-11-20 05:54:12,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691944299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:12,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306086410] [2021-11-20 05:54:12,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:54:12,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:12,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:12,892 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:12,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 05:54:12,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:54:12,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:54:12,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:54:12,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:54:13,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:54:13,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306086410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:13,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:54:13,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-20 05:54:13,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924621047] [2021-11-20 05:54:13,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:13,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:54:13,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:13,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:54:13,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-11-20 05:54:13,304 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:13,573 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-11-20 05:54:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:54:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-20 05:54:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:13,574 INFO L225 Difference]: With dead ends: 84 [2021-11-20 05:54:13,574 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 05:54:13,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=430, Invalid=1052, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 05:54:13,576 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 126 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:13,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 37 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:54:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 05:54:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-11-20 05:54:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-11-20 05:54:13,588 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2021-11-20 05:54:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:13,588 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-11-20 05:54:13,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-11-20 05:54:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 05:54:13,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:13,590 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:13,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:13,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:13,809 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:13,809 INFO L85 PathProgramCache]: Analyzing trace with hash -103051892, now seen corresponding path program 21 times [2021-11-20 05:54:13,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:13,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390561259] [2021-11-20 05:54:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:13,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:54:16,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390561259] [2021-11-20 05:54:16,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390561259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745359433] [2021-11-20 05:54:16,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:54:16,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:16,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:16,579 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:16,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 05:54:16,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-20 05:54:16,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:54:16,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-20 05:54:16,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:16,802 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 [2021-11-20 05:54:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:21,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:21,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:21,157 INFO L354 Elim1Store]: treesize reduction 198, result has 40.2 percent of original size [2021-11-20 05:54:21,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 153 [2021-11-20 05:54:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 9 proven. 167 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:54:21,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 05:54:33,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745359433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:33,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:54:33,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 43, 39] total 119 [2021-11-20 05:54:33,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633275237] [2021-11-20 05:54:33,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:33,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-20 05:54:33,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:33,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-20 05:54:33,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=13304, Unknown=0, NotChecked=0, Total=14042 [2021-11-20 05:54:33,483 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 119 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:42,530 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2021-11-20 05:54:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-20 05:54:42,531 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 119 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-20 05:54:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:42,531 INFO L225 Difference]: With dead ends: 86 [2021-11-20 05:54:42,532 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 05:54:42,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5453 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=1538, Invalid=28218, Unknown=0, NotChecked=0, Total=29756 [2021-11-20 05:54:42,533 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1340 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:42,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 176 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1514 Invalid, 0 Unknown, 1340 Unchecked, 0.9s Time] [2021-11-20 05:54:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 05:54:42,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2021-11-20 05:54:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-11-20 05:54:42,544 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2021-11-20 05:54:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:42,544 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-11-20 05:54:42,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 119 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-11-20 05:54:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 05:54:42,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:42,545 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:42,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-20 05:54:42,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:42,749 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:42,749 INFO L85 PathProgramCache]: Analyzing trace with hash -195387090, now seen corresponding path program 22 times [2021-11-20 05:54:42,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:42,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321193764] [2021-11-20 05:54:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:42,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:54:42,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:42,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321193764] [2021-11-20 05:54:42,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321193764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:42,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705955021] [2021-11-20 05:54:42,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:54:42,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:42,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:42,938 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:42,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 05:54:42,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:54:42,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:54:42,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 05:54:42,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:54:43,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:54:43,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705955021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:43,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:54:43,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-11-20 05:54:43,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122694518] [2021-11-20 05:54:43,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:43,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 05:54:43,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:43,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 05:54:43,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:54:43,414 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:43,683 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-11-20 05:54:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:54:43,683 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-20 05:54:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:43,684 INFO L225 Difference]: With dead ends: 128 [2021-11-20 05:54:43,684 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 05:54:43,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=1319, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 05:54:43,685 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:43,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 58 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:54:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 05:54:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-20 05:54:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-11-20 05:54:43,698 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 61 [2021-11-20 05:54:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:43,698 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-11-20 05:54:43,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-11-20 05:54:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 05:54:43,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:43,700 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:43,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:43,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 05:54:43,925 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1802898480, now seen corresponding path program 23 times [2021-11-20 05:54:43,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:43,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182561796] [2021-11-20 05:54:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:43,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 05:54:44,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:44,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182561796] [2021-11-20 05:54:44,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182561796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:44,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85209295] [2021-11-20 05:54:44,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:54:44,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:44,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:44,127 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:44,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 05:54:44,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-20 05:54:44,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:54:44,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 05:54:44,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 05:54:44,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 05:54:45,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85209295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:45,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:54:45,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2021-11-20 05:54:45,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932976521] [2021-11-20 05:54:45,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:45,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 05:54:45,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:45,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 05:54:45,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 05:54:45,027 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:45,440 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-11-20 05:54:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 05:54:45,440 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 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 63 [2021-11-20 05:54:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:45,457 INFO L225 Difference]: With dead ends: 92 [2021-11-20 05:54:45,457 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 05:54:45,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 05:54:45,458 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 228 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:45,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 40 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:54:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 05:54:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-11-20 05:54:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-11-20 05:54:45,472 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2021-11-20 05:54:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:45,473 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-11-20 05:54:45,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-11-20 05:54:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 05:54:45,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:45,473 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:45,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:45,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 05:54:45,690 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:45,691 INFO L85 PathProgramCache]: Analyzing trace with hash -370078158, now seen corresponding path program 24 times [2021-11-20 05:54:45,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:45,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796400245] [2021-11-20 05:54:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:45,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:54:48,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:48,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796400245] [2021-11-20 05:54:48,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796400245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:48,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225960676] [2021-11-20 05:54:48,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:54:48,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:48,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:48,879 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:48,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 05:54:48,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-20 05:54:48,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:54:48,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-20 05:54:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:53,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:53,802 INFO L354 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2021-11-20 05:54:53,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 55 [2021-11-20 05:54:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 5 proven. 234 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:54:54,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:11,940 INFO L354 Elim1Store]: treesize reduction 1438, result has 37.8 percent of original size [2021-11-20 05:55:11,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 339 treesize of output 941 [2021-11-20 05:55:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:55:50,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225960676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:50,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:55:50,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 43] total 132 [2021-11-20 05:55:50,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599101486] [2021-11-20 05:55:50,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:50,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-20 05:55:50,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:50,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-20 05:55:50,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=16547, Unknown=0, NotChecked=0, Total=17292 [2021-11-20 05:55:50,253 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 132 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 132 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:00,349 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-11-20 05:56:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-20 05:56:00,349 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 132 states have internal predecessors, (159), 0 states have call successors, (0), 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 65 [2021-11-20 05:56:00,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:00,350 INFO L225 Difference]: With dead ends: 93 [2021-11-20 05:56:00,350 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 05:56:00,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6603 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=1561, Invalid=35111, Unknown=0, NotChecked=0, Total=36672 [2021-11-20 05:56:00,352 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1675 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:00,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 193 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1815 Invalid, 0 Unknown, 1675 Unchecked, 1.0s Time] [2021-11-20 05:56:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 05:56:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-11-20 05:56:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-11-20 05:56:00,369 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 65 [2021-11-20 05:56:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:00,369 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-11-20 05:56:00,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 132 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-11-20 05:56:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:56:00,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:00,370 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:00,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:00,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 05:56:00,570 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:00,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:00,571 INFO L85 PathProgramCache]: Analyzing trace with hash 890409044, now seen corresponding path program 25 times [2021-11-20 05:56:00,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:00,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978160331] [2021-11-20 05:56:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:00,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 05:56:00,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:00,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978160331] [2021-11-20 05:56:00,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978160331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:00,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699016250] [2021-11-20 05:56:00,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:56:00,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:00,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:00,804 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:00,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 05:56:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:00,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 05:56:00,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 05:56:01,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 05:56:01,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699016250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:01,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:01,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-11-20 05:56:01,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957825219] [2021-11-20 05:56:01,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:01,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 05:56:01,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:01,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 05:56:01,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:56:01,449 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:01,766 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2021-11-20 05:56:01,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 05:56:01,766 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:56:01,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:01,767 INFO L225 Difference]: With dead ends: 140 [2021-11-20 05:56:01,767 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 05:56:01,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=481, Invalid=1589, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 05:56:01,768 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:01,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 66 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:56:01,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 05:56:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-20 05:56:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-11-20 05:56:01,781 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 67 [2021-11-20 05:56:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:01,781 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-11-20 05:56:01,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-11-20 05:56:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 05:56:01,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:01,782 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:01,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:01,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 05:56:01,993 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash -290594442, now seen corresponding path program 26 times [2021-11-20 05:56:01,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:01,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563712475] [2021-11-20 05:56:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:01,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 05:56:02,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563712475] [2021-11-20 05:56:02,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563712475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404839589] [2021-11-20 05:56:02,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:56:02,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:02,238 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:02,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 05:56:02,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:56:02,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 05:56:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 05:56:02,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 05:56:02,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404839589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:02,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:02,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-11-20 05:56:02,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975358303] [2021-11-20 05:56:02,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:02,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 05:56:02,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:02,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 05:56:02,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:56:02,850 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:03,189 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-11-20 05:56:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 05:56:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-20 05:56:03,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:03,193 INFO L225 Difference]: With dead ends: 100 [2021-11-20 05:56:03,193 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 05:56:03,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=623, Invalid=1539, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 05:56:03,194 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 169 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:03,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 29 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:56:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 05:56:03,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-11-20 05:56:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-20 05:56:03,213 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2021-11-20 05:56:03,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:03,213 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-20 05:56:03,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:03,213 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-20 05:56:03,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 05:56:03,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:03,214 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:03,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:03,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 05:56:03,433 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1295173032, now seen corresponding path program 27 times [2021-11-20 05:56:03,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:03,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126600219] [2021-11-20 05:56:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:03,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 25 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:07,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:07,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126600219] [2021-11-20 05:56:07,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126600219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:07,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114722152] [2021-11-20 05:56:07,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:56:07,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:07,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:07,606 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:07,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 05:56:07,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-20 05:56:07,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:07,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-20 05:56:07,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:07,893 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 15 treesize of output 11 [2021-11-20 05:56:14,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:14,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:14,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:14,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:14,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:14,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:14,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:14,978 INFO L354 Elim1Store]: treesize reduction 332, result has 37.7 percent of original size [2021-11-20 05:56:14,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 99 treesize of output 223 [2021-11-20 05:56:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 11 proven. 264 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:56:15,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 05:56:37,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114722152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:37,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:37,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 52, 47] total 145 [2021-11-20 05:56:37,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250942172] [2021-11-20 05:56:37,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:37,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-11-20 05:56:37,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-11-20 05:56:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=973, Invalid=19907, Unknown=0, NotChecked=0, Total=20880 [2021-11-20 05:56:37,360 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 145 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:53,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:53,276 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2021-11-20 05:56:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-20 05:56:53,277 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-20 05:56:53,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:53,277 INFO L225 Difference]: With dead ends: 100 [2021-11-20 05:56:53,277 INFO L226 Difference]: Without dead ends: 96 [2021-11-20 05:56:53,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8301 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=2182, Invalid=42128, Unknown=0, NotChecked=0, Total=44310 [2021-11-20 05:56:53,279 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1586 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:53,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 207 Invalid, 3728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1986 Invalid, 0 Unknown, 1586 Unchecked, 1.3s Time] [2021-11-20 05:56:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-20 05:56:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2021-11-20 05:56:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-20 05:56:53,294 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 71 [2021-11-20 05:56:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:53,295 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-20 05:56:53,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-20 05:56:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 05:56:53,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:53,295 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:53,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:53,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:53,496 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash 932465402, now seen corresponding path program 28 times [2021-11-20 05:56:53,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:53,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441414871] [2021-11-20 05:56:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:53,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 05:56:53,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:53,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441414871] [2021-11-20 05:56:53,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441414871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:53,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517008889] [2021-11-20 05:56:53,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:56:53,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:53,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:53,787 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:53,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 05:56:53,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:56:53,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:53,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 05:56:53,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 05:56:54,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 05:56:54,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517008889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:54,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:54,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2021-11-20 05:56:54,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182087785] [2021-11-20 05:56:54,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:54,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 05:56:54,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 05:56:54,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 05:56:54,429 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:54,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:54,787 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2021-11-20 05:56:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:56:54,788 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-20 05:56:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:54,788 INFO L225 Difference]: With dead ends: 152 [2021-11-20 05:56:54,788 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 05:56:54,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=566, Invalid=1884, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 05:56:54,789 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:54,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:56:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 05:56:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-20 05:56:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-11-20 05:56:54,806 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 73 [2021-11-20 05:56:54,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:54,806 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-11-20 05:56:54,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-11-20 05:56:54,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 05:56:54,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:54,808 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:54,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-20 05:56:55,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 05:56:55,026 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:55,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:55,026 INFO L85 PathProgramCache]: Analyzing trace with hash -264062308, now seen corresponding path program 29 times [2021-11-20 05:56:55,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:55,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309770159] [2021-11-20 05:56:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:55,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 05:56:55,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:55,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309770159] [2021-11-20 05:56:55,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309770159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909133091] [2021-11-20 05:56:55,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:56:55,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:55,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:55,313 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:55,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 05:56:55,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-20 05:56:55,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:55,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 05:56:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 05:56:56,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 05:56:56,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909133091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:56,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:56,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2021-11-20 05:56:56,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793304178] [2021-11-20 05:56:56,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:56,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-20 05:56:56,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:56,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-20 05:56:56,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=2953, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 05:56:56,563 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:57,119 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2021-11-20 05:56:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:56:57,120 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 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 75 [2021-11-20 05:56:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:57,120 INFO L225 Difference]: With dead ends: 108 [2021-11-20 05:56:57,120 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 05:56:57,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=874, Invalid=4382, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 05:56:57,122 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 199 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:57,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 43 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:56:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 05:56:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-11-20 05:56:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-11-20 05:56:57,139 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2021-11-20 05:56:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:57,139 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-11-20 05:56:57,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-11-20 05:56:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 05:56:57,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:57,140 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:57,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:57,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:57,365 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash -7769602, now seen corresponding path program 30 times [2021-11-20 05:56:57,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:57,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464213085] [2021-11-20 05:56:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:57,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 36 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:57:02,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:02,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464213085] [2021-11-20 05:57:02,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464213085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:02,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355327098] [2021-11-20 05:57:02,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:57:02,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:02,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:02,212 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:02,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 05:57:02,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-20 05:57:02,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:57:02,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-20 05:57:02,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:13,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:13,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:57:14,749 INFO L354 Elim1Store]: treesize reduction 938, result has 34.3 percent of original size [2021-11-20 05:57:14,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 153 treesize of output 517 [2021-11-20 05:57:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 17 proven. 282 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:57:16,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:45,299 INFO L354 Elim1Store]: treesize reduction 3130, result has 19.0 percent of original size [2021-11-20 05:57:45,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 0 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 443 treesize of output 809 [2021-11-20 05:58:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 05:58:51,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355327098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:58:51,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:58:51,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 54, 51] total 158 [2021-11-20 05:58:51,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899556806] [2021-11-20 05:58:51,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:58:51,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-11-20 05:58:51,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:58:51,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-11-20 05:58:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=23586, Unknown=0, NotChecked=0, Total=24806 [2021-11-20 05:58:51,643 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 158 states, 158 states have (on average 1.1835443037974684) internal successors, (187), 158 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:16,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:59:16,853 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2021-11-20 05:59:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-20 05:59:16,853 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.1835443037974684) internal successors, (187), 158 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-20 05:59:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:59:16,854 INFO L225 Difference]: With dead ends: 109 [2021-11-20 05:59:16,854 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 05:59:16,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9762 ImplicationChecksByTransitivity, 60.7s TimeCoverageRelationStatistics Valid=2768, Invalid=50362, Unknown=0, NotChecked=0, Total=53130 [2021-11-20 05:59:16,856 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 4596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1708 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:59:16,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 236 Invalid, 4596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2706 Invalid, 0 Unknown, 1708 Unchecked, 1.9s Time] [2021-11-20 05:59:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 05:59:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2021-11-20 05:59:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-11-20 05:59:16,881 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 77 [2021-11-20 05:59:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:59:16,881 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-11-20 05:59:16,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.1835443037974684) internal successors, (187), 158 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-11-20 05:59:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 05:59:16,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:59:16,882 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:16,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:17,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:17,083 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:59:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:17,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1176580384, now seen corresponding path program 31 times [2021-11-20 05:59:17,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:17,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333618024] [2021-11-20 05:59:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:17,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 05:59:17,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:17,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333618024] [2021-11-20 05:59:17,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333618024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:17,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648850689] [2021-11-20 05:59:17,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:59:17,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:17,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:17,464 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:17,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 05:59:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:17,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 05:59:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 05:59:18,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 05:59:18,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648850689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:59:18,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:59:18,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2021-11-20 05:59:18,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944601290] [2021-11-20 05:59:18,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:59:18,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 05:59:18,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:18,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 05:59:18,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 05:59:18,270 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:59:18,663 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2021-11-20 05:59:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 05:59:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-20 05:59:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:59:18,665 INFO L225 Difference]: With dead ends: 164 [2021-11-20 05:59:18,665 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 05:59:18,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 05:59:18,666 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:59:18,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 52 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:59:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 05:59:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-20 05:59:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-11-20 05:59:18,687 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 79 [2021-11-20 05:59:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:59:18,688 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-11-20 05:59:18,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-11-20 05:59:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 05:59:18,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:59:18,689 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:18,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:18,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 05:59:18,896 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:59:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1850613950, now seen corresponding path program 32 times [2021-11-20 05:59:18,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:18,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042636063] [2021-11-20 05:59:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:18,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 05:59:19,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:19,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042636063] [2021-11-20 05:59:19,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042636063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:19,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053828529] [2021-11-20 05:59:19,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:59:19,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:19,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:19,274 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:19,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 05:59:19,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:59:19,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:59:19,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 05:59:19,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 05:59:19,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 05:59:19,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053828529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:59:19,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:59:19,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2021-11-20 05:59:19,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819335856] [2021-11-20 05:59:19,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:59:19,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 05:59:19,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 05:59:19,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1247, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 05:59:19,998 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:59:20,357 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-11-20 05:59:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:59:20,358 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-20 05:59:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:59:20,358 INFO L225 Difference]: With dead ends: 116 [2021-11-20 05:59:20,358 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 05:59:20,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=852, Invalid=2118, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 05:59:20,359 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:59:20,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 26 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:59:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 05:59:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-11-20 05:59:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-11-20 05:59:20,378 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2021-11-20 05:59:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:59:20,378 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-11-20 05:59:20,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:20,378 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-11-20 05:59:20,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 05:59:20,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:59:20,379 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:20,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:20,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-20 05:59:20,593 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:59:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:20,593 INFO L85 PathProgramCache]: Analyzing trace with hash 79107364, now seen corresponding path program 33 times [2021-11-20 05:59:20,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:20,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999220094] [2021-11-20 05:59:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:20,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 36 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:59:26,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:26,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999220094] [2021-11-20 05:59:26,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999220094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:26,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001552565] [2021-11-20 05:59:26,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:59:26,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:26,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:26,224 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:26,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 05:59:26,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-20 05:59:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:59:26,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 131 conjunts are in the unsatisfiable core [2021-11-20 05:59:26,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:26,686 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 [2021-11-20 05:59:40,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:40,537 INFO L354 Elim1Store]: treesize reduction 500, result has 36.1 percent of original size [2021-11-20 05:59:40,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 117 treesize of output 307 [2021-11-20 05:59:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 13 proven. 383 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:59:41,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:00:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 06:00:17,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001552565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:00:17,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:00:17,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 61, 55] total 172 [2021-11-20 06:00:17,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205623723] [2021-11-20 06:00:17,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:00:17,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2021-11-20 06:00:17,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2021-11-20 06:00:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=28131, Unknown=1, NotChecked=0, Total=29412 [2021-11-20 06:00:17,400 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 172 states, 172 states have (on average 1.180232558139535) internal successors, (203), 172 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:43,937 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2021-11-20 06:00:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-20 06:00:43,938 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 1.180232558139535) internal successors, (203), 172 states have internal predecessors, (203), 0 states have call successors, (0), 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 83 [2021-11-20 06:00:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:43,938 INFO L225 Difference]: With dead ends: 117 [2021-11-20 06:00:43,938 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 06:00:43,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11472 ImplicationChecksByTransitivity, 73.2s TimeCoverageRelationStatistics Valid=2946, Invalid=59803, Unknown=1, NotChecked=0, Total=62750 [2021-11-20 06:00:43,944 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 89 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 5503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2700 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:43,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 230 Invalid, 5503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2586 Invalid, 0 Unknown, 2700 Unchecked, 1.8s Time] [2021-11-20 06:00:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 06:00:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2021-11-20 06:00:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-11-20 06:00:43,980 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 83 [2021-11-20 06:00:43,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:43,980 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-11-20 06:00:43,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 172 states have (on average 1.180232558139535) internal successors, (203), 172 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-11-20 06:00:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:00:43,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:43,981 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:44,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:44,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-20 06:00:44,181 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:44,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1234001210, now seen corresponding path program 34 times [2021-11-20 06:00:44,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:44,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124700091] [2021-11-20 06:00:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:44,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 06:00:44,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124700091] [2021-11-20 06:00:44,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124700091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179056489] [2021-11-20 06:00:44,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:00:44,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:44,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:44,547 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:44,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 06:00:44,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:00:44,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:00:44,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:00:44,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 06:00:45,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:00:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 06:00:45,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179056489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:00:45,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:00:45,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2021-11-20 06:00:45,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195972671] [2021-11-20 06:00:45,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:00:45,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 06:00:45,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:45,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 06:00:45,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 06:00:45,447 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:45,951 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2021-11-20 06:00:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:00:45,952 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-20 06:00:45,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:45,953 INFO L225 Difference]: With dead ends: 176 [2021-11-20 06:00:45,953 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 06:00:45,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=757, Invalid=2549, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 06:00:45,954 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:45,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 54 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:00:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 06:00:45,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-11-20 06:00:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-11-20 06:00:45,979 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 85 [2021-11-20 06:00:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:45,979 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-11-20 06:00:45,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-11-20 06:00:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 06:00:45,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:45,979 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:46,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:46,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:46,180 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:46,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1730367640, now seen corresponding path program 35 times [2021-11-20 06:00:46,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:46,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206439937] [2021-11-20 06:00:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:46,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-20 06:00:46,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:46,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206439937] [2021-11-20 06:00:46,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206439937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:46,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389530583] [2021-11-20 06:00:46,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:00:46,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:46,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:46,550 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:46,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 06:00:47,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-20 06:00:47,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:00:47,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:00:47,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-20 06:00:47,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:00:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-20 06:00:48,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389530583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:00:48,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:00:48,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2021-11-20 06:00:48,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855393259] [2021-11-20 06:00:48,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:00:48,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-20 06:00:48,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:48,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-20 06:00:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=4061, Unknown=0, NotChecked=0, Total=4692 [2021-11-20 06:00:48,421 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:49,137 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2021-11-20 06:00:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:00:49,138 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 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 87 [2021-11-20 06:00:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:49,138 INFO L225 Difference]: With dead ends: 124 [2021-11-20 06:00:49,138 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 06:00:49,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1173, Invalid=5967, Unknown=0, NotChecked=0, Total=7140 [2021-11-20 06:00:49,140 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 205 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:49,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 47 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:00:49,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 06:00:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-11-20 06:00:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-11-20 06:00:49,173 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2021-11-20 06:00:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:49,173 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-11-20 06:00:49,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-11-20 06:00:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 06:00:49,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:49,174 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:49,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:49,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 06:00:49,381 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:49,381 INFO L85 PathProgramCache]: Analyzing trace with hash 106922954, now seen corresponding path program 36 times [2021-11-20 06:00:49,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:49,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079573699] [2021-11-20 06:00:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:49,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 38 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:00:56,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079573699] [2021-11-20 06:00:56,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079573699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803609816] [2021-11-20 06:00:56,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:00:56,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:56,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:56,025 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:56,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 06:00:56,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-20 06:00:56,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:00:56,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 141 conjunts are in the unsatisfiable core [2021-11-20 06:00:56,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:56,892 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 [2021-11-20 06:01:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:08,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:08,826 INFO L354 Elim1Store]: treesize reduction 98, result has 44.6 percent of original size [2021-11-20 06:01:08,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 97 [2021-11-20 06:01:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 7 proven. 491 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:01:09,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:01:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 06:01:56,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803609816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:01:56,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:01:56,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 59] total 189 [2021-11-20 06:01:56,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224424715] [2021-11-20 06:01:56,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:01:56,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2021-11-20 06:01:56,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:56,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2021-11-20 06:01:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1243, Invalid=34289, Unknown=0, NotChecked=0, Total=35532 [2021-11-20 06:01:56,321 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 189 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 189 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:25,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:25,251 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-11-20 06:02:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-20 06:02:25,251 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 189 states have internal predecessors, (225), 0 states have call successors, (0), 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 89 [2021-11-20 06:02:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:25,252 INFO L225 Difference]: With dead ends: 125 [2021-11-20 06:02:25,252 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 06:02:25,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14384 ImplicationChecksByTransitivity, 83.8s TimeCoverageRelationStatistics Valid=2842, Invalid=71960, Unknown=0, NotChecked=0, Total=74802 [2021-11-20 06:02:25,255 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 66 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 3234 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 6119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 3234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2675 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:25,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 270 Invalid, 6119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 3234 Invalid, 0 Unknown, 2675 Unchecked, 2.2s Time] [2021-11-20 06:02:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 06:02:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-11-20 06:02:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2021-11-20 06:02:25,286 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 89 [2021-11-20 06:02:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:25,286 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2021-11-20 06:02:25,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 189 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2021-11-20 06:02:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 06:02:25,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:25,287 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:25,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:25,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 06:02:25,509 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:25,509 INFO L85 PathProgramCache]: Analyzing trace with hash -273022996, now seen corresponding path program 37 times [2021-11-20 06:02:25,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:25,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271646422] [2021-11-20 06:02:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:25,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-20 06:02:25,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271646422] [2021-11-20 06:02:25,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271646422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854694414] [2021-11-20 06:02:25,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:02:25,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:25,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:25,859 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:25,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 06:02:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:25,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:02:25,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-20 06:02:26,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-20 06:02:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854694414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:26,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:26,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2021-11-20 06:02:26,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049654658] [2021-11-20 06:02:26,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:26,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 06:02:26,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 06:02:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 06:02:26,701 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:27,245 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2021-11-20 06:02:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:02:27,246 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-20 06:02:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:27,247 INFO L225 Difference]: With dead ends: 188 [2021-11-20 06:02:27,247 INFO L226 Difference]: Without dead ends: 98 [2021-11-20 06:02:27,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=2919, Unknown=0, NotChecked=0, Total=3782 [2021-11-20 06:02:27,248 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:27,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 59 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:02:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-20 06:02:27,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-20 06:02:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-11-20 06:02:27,290 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 91 [2021-11-20 06:02:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:27,291 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-11-20 06:02:27,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-11-20 06:02:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:02:27,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:27,292 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:27,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:27,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 06:02:27,505 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:27,505 INFO L85 PathProgramCache]: Analyzing trace with hash 521964302, now seen corresponding path program 38 times [2021-11-20 06:02:27,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:27,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402902408] [2021-11-20 06:02:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:27,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-20 06:02:27,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:27,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402902408] [2021-11-20 06:02:27,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402902408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:27,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014235715] [2021-11-20 06:02:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:02:27,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:27,902 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:27,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 06:02:27,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:02:27,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:02:27,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:02:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-20 06:02:28,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-20 06:02:28,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014235715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:28,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:28,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2021-11-20 06:02:28,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126191610] [2021-11-20 06:02:28,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:28,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 06:02:28,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:28,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 06:02:28,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 06:02:28,698 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:29,210 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2021-11-20 06:02:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:02:29,210 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 06:02:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:29,211 INFO L225 Difference]: With dead ends: 132 [2021-11-20 06:02:29,211 INFO L226 Difference]: Without dead ends: 98 [2021-11-20 06:02:29,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1117, Invalid=2789, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 06:02:29,212 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 175 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:29,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 35 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:02:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-20 06:02:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-11-20 06:02:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-11-20 06:02:29,238 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2021-11-20 06:02:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:29,238 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-11-20 06:02:29,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-11-20 06:02:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 06:02:29,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:29,239 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:29,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:29,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-20 06:02:29,439 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1577328112, now seen corresponding path program 39 times [2021-11-20 06:02:29,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:29,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716897376] [2021-11-20 06:02:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:29,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 81 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:36,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:36,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716897376] [2021-11-20 06:02:36,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716897376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:36,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505285260] [2021-11-20 06:02:36,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:02:36,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:36,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:36,842 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:36,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 06:02:37,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-20 06:02:37,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:02:37,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 157 conjunts are in the unsatisfiable core [2021-11-20 06:02:37,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:37,892 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 [2021-11-20 06:02:38,003 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 [2021-11-20 06:02:38,118 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 [2021-11-20 06:02:38,231 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 [2021-11-20 06:02:53,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:53,634 INFO L354 Elim1Store]: treesize reduction 702, result has 35.1 percent of original size [2021-11-20 06:02:53,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 135 treesize of output 405 [2021-11-20 06:02:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 42 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:54,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:12,397 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-20 06:03:12,398 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-20 06:03:12,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:03:12,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2021-11-20 06:03:12,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305424765] [2021-11-20 06:03:12,398 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:03:12,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-20 06:03:12,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-20 06:03:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2288, Invalid=28864, Unknown=0, NotChecked=0, Total=31152 [2021-11-20 06:03:12,400 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 77 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 77 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:12,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:03:12,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10211 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=2288, Invalid=28864, Unknown=0, NotChecked=0, Total=31152 [2021-11-20 06:03:12,402 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:12,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:03:12,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-20 06:03:12,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:12,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:12,603 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5bae0d80 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 06:03:12,606 INFO L158 Benchmark]: Toolchain (without parser) took 640292.37ms. Allocated memory was 113.2MB in the beginning and 293.6MB in the end (delta: 180.4MB). Free memory was 76.4MB in the beginning and 65.7MB in the end (delta: 10.7MB). Peak memory consumption was 190.7MB. Max. memory is 16.1GB. [2021-11-20 06:03:12,606 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 93.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:03:12,606 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.18ms. Allocated memory is still 113.2MB. Free memory was 76.2MB in the beginning and 90.5MB in the end (delta: -14.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:03:12,607 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.60ms. Allocated memory is still 113.2MB. Free memory was 90.5MB in the beginning and 88.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:03:12,607 INFO L158 Benchmark]: Boogie Preprocessor took 22.73ms. Allocated memory is still 113.2MB. Free memory was 88.7MB in the beginning and 87.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:03:12,607 INFO L158 Benchmark]: RCFGBuilder took 244.62ms. Allocated memory is still 113.2MB. Free memory was 87.7MB in the beginning and 77.9MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:03:12,607 INFO L158 Benchmark]: TraceAbstraction took 639736.51ms. Allocated memory was 113.2MB in the beginning and 293.6MB in the end (delta: 180.4MB). Free memory was 77.6MB in the beginning and 65.7MB in the end (delta: 11.9MB). Peak memory consumption was 195.1MB. Max. memory is 16.1GB. [2021-11-20 06:03:12,608 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 93.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.18ms. Allocated memory is still 113.2MB. Free memory was 76.2MB in the beginning and 90.5MB in the end (delta: -14.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.60ms. Allocated memory is still 113.2MB. Free memory was 90.5MB in the beginning and 88.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.73ms. Allocated memory is still 113.2MB. Free memory was 88.7MB in the beginning and 87.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 244.62ms. Allocated memory is still 113.2MB. Free memory was 87.7MB in the beginning and 77.9MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 639736.51ms. Allocated memory was 113.2MB in the beginning and 293.6MB in the end (delta: 180.4MB). Free memory was 77.6MB in the beginning and 65.7MB in the end (delta: 11.9MB). Peak memory consumption was 195.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5bae0d80 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5bae0d80: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF --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 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:03:14,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:03:14,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:03:14,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:03:14,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:03:14,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:03:14,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:03:14,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:03:14,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:03:14,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:03:14,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:03:14,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:03:14,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:03:14,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:03:14,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:03:14,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:03:14,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:03:14,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:03:14,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:03:14,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:03:14,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:03:14,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:03:14,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:03:14,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:03:14,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:03:14,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:03:14,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:03:14,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:03:14,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:03:14,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:03:14,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:03:14,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:03:14,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:03:14,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:03:14,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:03:14,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:03:14,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:03:14,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:03:14,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:03:14,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:03:14,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:03:14,950 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 06:03:14,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:03:14,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:03:14,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:03:15,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:03:15,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:03:15,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:03:15,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:03:15,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:03:15,003 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:03:15,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:03:15,004 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:03:15,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:03:15,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:03:15,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:03:15,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:03:15,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:03:15,006 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:03:15,006 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:03:15,006 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:03:15,007 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:03:15,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:03:15,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:03:15,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:03:15,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:03:15,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:03:15,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:03:15,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:03:15,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:03:15,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:03:15,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:03:15,010 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:03:15,010 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:03:15,010 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:03:15,010 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:03:15,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:03:15,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:03:15,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:03:15,012 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 [2021-11-20 06:03:15,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:03:15,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:03:15,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:03:15,436 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:03:15,436 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:03:15,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-crafted/zero_sum1.c [2021-11-20 06:03:15,523 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/data/559bbb319/da821eb41f984324b37f6a1215a1c2fe/FLAG20758978b [2021-11-20 06:03:16,060 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:03:16,062 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/sv-benchmarks/c/array-crafted/zero_sum1.c [2021-11-20 06:03:16,069 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/data/559bbb319/da821eb41f984324b37f6a1215a1c2fe/FLAG20758978b [2021-11-20 06:03:16,419 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/data/559bbb319/da821eb41f984324b37f6a1215a1c2fe [2021-11-20 06:03:16,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:03:16,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:03:16,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:03:16,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:03:16,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:03:16,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110bfb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16, skipping insertion in model container [2021-11-20 06:03:16,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:03:16,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:03:16,652 WARN L230 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_bc41fdd0-fae9-453d-abae-34dcb155c4d5/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2021-11-20 06:03:16,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:03:16,685 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:03:16,707 WARN L230 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_bc41fdd0-fae9-453d-abae-34dcb155c4d5/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2021-11-20 06:03:16,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:03:16,757 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:03:16,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16 WrapperNode [2021-11-20 06:03:16,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:03:16,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:03:16,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:03:16,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:03:16,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,791 INFO L137 Inliner]: procedures = 17, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-11-20 06:03:16,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:03:16,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:03:16,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:03:16,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:03:16,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:03:16,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:03:16,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:03:16,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:03:16,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (1/1) ... [2021-11-20 06:03:16,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:03:16,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:16,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:03:16,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:03:16,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:03:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:03:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:03:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-20 06:03:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:03:16,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:03:16,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-20 06:03:16,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:03:16,977 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:03:16,978 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:03:17,187 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:03:17,193 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:03:17,193 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:03:17,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:03:17 BoogieIcfgContainer [2021-11-20 06:03:17,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:03:17,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:03:17,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:03:17,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:03:17,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:03:16" (1/3) ... [2021-11-20 06:03:17,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273ee8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:03:17, skipping insertion in model container [2021-11-20 06:03:17,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:16" (2/3) ... [2021-11-20 06:03:17,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273ee8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:03:17, skipping insertion in model container [2021-11-20 06:03:17,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:03:17" (3/3) ... [2021-11-20 06:03:17,203 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2021-11-20 06:03:17,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:03:17,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:03:17,253 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:03:17,275 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 [2021-11-20 06:03:17,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:03:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 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) [2021-11-20 06:03:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:03:17,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:17,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:17,321 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:17,326 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2021-11-20 06:03:17,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:17,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680858387] [2021-11-20 06:03:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:17,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:17,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:17,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:03:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:17,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:03:17,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:17,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:17,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:03:17,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680858387] [2021-11-20 06:03:17,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680858387] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:17,582 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:17,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:03:17,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656599087] [2021-11-20 06:03:17,586 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:17,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:03:17,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:03:17,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:03:17,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:03:17,636 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 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) 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) [2021-11-20 06:03:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:17,652 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-20 06:03:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:03:17,654 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 [2021-11-20 06:03:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:17,661 INFO L225 Difference]: With dead ends: 35 [2021-11-20 06:03:17,662 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 06:03:17,665 INFO L932 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 [2021-11-20 06:03:17,669 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:17,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:03:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 06:03:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-20 06:03:17,699 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) [2021-11-20 06:03:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-20 06:03:17,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-20 06:03:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:17,702 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-20 06:03:17,702 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) [2021-11-20 06:03:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-20 06:03:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:03:17,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:17,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:17,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:17,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:03:17,915 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2021-11-20 06:03:17,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:17,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685312429] [2021-11-20 06:03:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:17,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:17,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:17,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:17,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:03:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:03:17,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:18,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:18,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:03:18,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685312429] [2021-11-20 06:03:18,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685312429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:18,094 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:18,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 06:03:18,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193594620] [2021-11-20 06:03:18,095 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:18,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:03:18,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:03:18,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:03:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:03:18,098 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:18,134 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-11-20 06:03:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:03:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2021-11-20 06:03:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:18,135 INFO L225 Difference]: With dead ends: 22 [2021-11-20 06:03:18,136 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 06:03:18,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:03:18,138 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:18,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:03:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 06:03:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-20 06:03:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2021-11-20 06:03:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-20 06:03:18,145 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-11-20 06:03:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:18,146 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-20 06:03:18,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-20 06:03:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:03:18,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:18,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:18,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:18,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:03:18,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:18,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:18,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1727609346, now seen corresponding path program 1 times [2021-11-20 06:03:18,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:18,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049363750] [2021-11-20 06:03:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:18,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:18,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:18,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:18,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:03:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:03:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:03:18,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:03:18,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:03:18,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049363750] [2021-11-20 06:03:18,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049363750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:18,527 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:18,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 06:03:18,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294399959] [2021-11-20 06:03:18,528 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:18,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:03:18,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:03:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:03:18,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:03:18,530 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:18,588 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-11-20 06:03:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:03:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 06:03:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:18,591 INFO L225 Difference]: With dead ends: 34 [2021-11-20 06:03:18,591 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 06:03:18,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:03:18,597 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:18,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:03:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 06:03:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-20 06:03:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-20 06:03:18,613 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-11-20 06:03:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:18,614 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-20 06:03:18,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-20 06:03:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:03:18,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:18,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:18,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:18,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:03:18,825 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:18,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1750506814, now seen corresponding path program 1 times [2021-11-20 06:03:18,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:18,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133961087] [2021-11-20 06:03:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:18,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:18,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:18,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:18,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:03:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:03:18,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:03:19,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:03:19,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:03:19,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133961087] [2021-11-20 06:03:19,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133961087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:03:19,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:03:19,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 06:03:19,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108585262] [2021-11-20 06:03:19,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:03:19,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:03:19,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:03:19,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:03:19,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:03:19,363 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-11-20 06:03:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:19,639 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-11-20 06:03:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:03:19,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:03:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:19,643 INFO L225 Difference]: With dead ends: 48 [2021-11-20 06:03:19,644 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 06:03:19,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:03:19,648 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:19,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 46 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:03:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 06:03:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-11-20 06:03:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-20 06:03:19,661 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2021-11-20 06:03:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:19,662 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-20 06:03:19,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-11-20 06:03:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-20 06:03:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:03:19,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:19,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:19,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:19,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:03:19,876 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1775953350, now seen corresponding path program 1 times [2021-11-20 06:03:19,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:19,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903450775] [2021-11-20 06:03:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:19,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:19,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:19,880 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:19,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:03:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:03:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:03:20,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:03:20,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:03:20,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903450775] [2021-11-20 06:03:20,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903450775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:03:20,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:03:20,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-20 06:03:20,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100872114] [2021-11-20 06:03:20,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:03:20,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:03:20,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:03:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:03:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:03:20,475 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:21,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:21,076 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-11-20 06:03:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:03:21,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 06:03:21,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:21,078 INFO L225 Difference]: With dead ends: 73 [2021-11-20 06:03:21,078 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 06:03:21,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:03:21,080 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 121 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:21,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 60 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:03:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 06:03:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 24. [2021-11-20 06:03:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2021-11-20 06:03:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-20 06:03:21,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-11-20 06:03:21,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:21,089 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-20 06:03:21,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-20 06:03:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 06:03:21,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:21,090 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:21,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:21,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:03:21,301 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:21,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 2 times [2021-11-20 06:03:21,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:21,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415700037] [2021-11-20 06:03:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:03:21,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:21,304 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:21,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:03:21,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:03:21,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:03:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:03:21,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:21,837 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 06:03:21,838 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 41 treesize of output 21 [2021-11-20 06:03:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:03:21,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:24,627 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-11-20 06:03:24,628 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 47 treesize of output 63 [2021-11-20 06:03:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:03:29,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:03:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415700037] [2021-11-20 06:03:29,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415700037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:03:29,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:03:29,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-11-20 06:03:29,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213433585] [2021-11-20 06:03:29,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:03:29,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:03:29,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:03:29,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:03:29,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=261, Unknown=1, NotChecked=0, Total=306 [2021-11-20 06:03:29,776 INFO L87 Difference]: Start difference. First operand 24 states and 26 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) [2021-11-20 06:03:31,910 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:36,284 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:36,601 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-20 06:03:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:03:36,601 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 23 [2021-11-20 06:03:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:36,602 INFO L225 Difference]: With dead ends: 36 [2021-11-20 06:03:36,602 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 06:03:36,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=54, Invalid=325, Unknown=1, NotChecked=0, Total=380 [2021-11-20 06:03:36,604 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:36,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 90 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 2 Unknown, 5 Unchecked, 4.6s Time] [2021-11-20 06:03:36,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 06:03:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-11-20 06:03:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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) [2021-11-20 06:03:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-20 06:03:36,610 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2021-11-20 06:03:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:36,610 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-20 06:03:36,611 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) [2021-11-20 06:03:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-20 06:03:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:03:36,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:36,612 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:36,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-20 06:03:36,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:03:36,827 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:36,827 INFO L85 PathProgramCache]: Analyzing trace with hash -732186678, now seen corresponding path program 3 times [2021-11-20 06:03:36,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319549954] [2021-11-20 06:03:36,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:03:36,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:36,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:36,829 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:36,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:03:36,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:03:36,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:03:36,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:03:36,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:03:37,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:03:37,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:03:37,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319549954] [2021-11-20 06:03:37,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319549954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:03:37,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:03:37,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-11-20 06:03:37,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337294031] [2021-11-20 06:03:37,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:03:37,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:03:37,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:03:37,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:03:37,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:03:37,647 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-11-20 06:03:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:38,065 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-11-20 06:03:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:03:38,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 06:03:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:38,066 INFO L225 Difference]: With dead ends: 56 [2021-11-20 06:03:38,066 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 06:03:38,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:03:38,068 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:38,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 45 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:03:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 06:03:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-20 06:03:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-20 06:03:38,074 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 25 [2021-11-20 06:03:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:38,074 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-20 06:03:38,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-11-20 06:03:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-20 06:03:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:03:38,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:38,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:38,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:38,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:03:38,281 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:38,282 INFO L85 PathProgramCache]: Analyzing trace with hash 368620396, now seen corresponding path program 4 times [2021-11-20 06:03:38,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:38,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669409506] [2021-11-20 06:03:38,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:03:38,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:38,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:38,284 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:38,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:03:38,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:03:38,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:03:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:03:38,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:03:38,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:03:39,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:03:39,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669409506] [2021-11-20 06:03:39,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669409506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:03:39,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:03:39,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-20 06:03:39,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842244052] [2021-11-20 06:03:39,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:03:39,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:03:39,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:03:39,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:03:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:03:39,059 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 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) [2021-11-20 06:03:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:39,656 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-11-20 06:03:39,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:03:39,657 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 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) Word has length 27 [2021-11-20 06:03:39,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:39,658 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:03:39,658 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 06:03:39,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:03:39,660 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 176 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:39,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 45 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:03:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 06:03:39,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2021-11-20 06:03:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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) [2021-11-20 06:03:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-20 06:03:39,667 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-11-20 06:03:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:39,667 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-20 06:03:39,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 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) [2021-11-20 06:03:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-20 06:03:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:03:39,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:39,669 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:39,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:39,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:03:39,880 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:39,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:39,881 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 5 times [2021-11-20 06:03:39,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:39,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91600556] [2021-11-20 06:03:39,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:03:39,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:39,883 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:39,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc41fdd0-fae9-453d-abae-34dcb155c4d5/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:03:41,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 06:03:41,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:03:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:03:41,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:42,309 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 06:03:42,309 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 62 treesize of output 30 [2021-11-20 06:03:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:03:42,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:48,425 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-11-20 06:03:48,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 125 [2021-11-20 06:04:53,608 WARN L227 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 4 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)