./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/vogal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y --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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:09:26,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:09:26,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:09:26,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:09:26,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:09:26,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:09:26,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:09:26,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:09:26,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:09:26,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:09:26,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:09:26,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:09:26,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:09:26,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:09:26,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:09:26,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:09:26,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:09:26,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:09:26,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:09:26,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:09:26,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:09:26,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:09:26,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:09:26,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:09:26,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:09:26,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:09:26,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:09:26,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:09:26,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:09:26,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:09:26,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:09:26,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:09:26,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:09:26,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:09:26,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:09:26,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:09:26,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:09:26,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:09:26,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:09:26,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:09:26,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:09:26,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:09:26,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:09:26,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:09:26,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:09:26,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:09:26,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:09:26,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:09:26,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:09:26,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:09:26,259 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:09:26,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:09:26,260 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:09:26,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:09:26,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:09:26,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:09:26,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:09:26,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:09:26,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:09:26,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:09:26,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:09:26,263 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:09:26,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:09:26,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:09:26,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:09:26,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:09:26,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:09:26,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:09:26,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:09:26,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:09:26,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:09:26,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:09:26,267 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:09:26,267 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:09:26,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:09:26,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:09:26,268 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_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2021-11-13 18:09:26,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:09:26,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:09:26,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:09:26,586 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:09:26,587 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:09:26,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/loops/vogal-1.i [2021-11-13 18:09:26,677 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/data/0a92d06db/dd329b2c27e1410a9f9a910ae12b55ac/FLAGbba509992 [2021-11-13 18:09:27,183 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:09:27,184 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/sv-benchmarks/c/loops/vogal-1.i [2021-11-13 18:09:27,191 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/data/0a92d06db/dd329b2c27e1410a9f9a910ae12b55ac/FLAGbba509992 [2021-11-13 18:09:27,531 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/data/0a92d06db/dd329b2c27e1410a9f9a910ae12b55ac [2021-11-13 18:09:27,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:09:27,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:09:27,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:09:27,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:09:27,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:09:27,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4997bf51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27, skipping insertion in model container [2021-11-13 18:09:27,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:09:27,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:09:27,752 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/sv-benchmarks/c/loops/vogal-1.i[895,908] [2021-11-13 18:09:27,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:09:27,791 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:09:27,805 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/sv-benchmarks/c/loops/vogal-1.i[895,908] [2021-11-13 18:09:27,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:09:27,835 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:09:27,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27 WrapperNode [2021-11-13 18:09:27,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:09:27,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:09:27,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:09:27,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:09:27,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:09:27,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:09:27,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:09:27,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:09:27,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:09:27,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:09:27,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:09:27,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:09:27,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ... [2021-11-13 18:09:27,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:09:27,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:27,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:09:27,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:09:28,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:09:28,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:09:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:09:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:09:28,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:09:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:09:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:09:28,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:09:28,245 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-13 18:09:28,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:09:28 BoogieIcfgContainer [2021-11-13 18:09:28,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:09:28,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:09:28,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:09:28,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:09:28,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:09:27" (1/3) ... [2021-11-13 18:09:28,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd38ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:09:28, skipping insertion in model container [2021-11-13 18:09:28,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (2/3) ... [2021-11-13 18:09:28,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd38ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:09:28, skipping insertion in model container [2021-11-13 18:09:28,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:09:28" (3/3) ... [2021-11-13 18:09:28,255 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2021-11-13 18:09:28,260 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:09:28,261 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:09:28,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:09:28,317 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 [2021-11-13 18:09:28,318 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:09:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 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) [2021-11-13 18:09:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:09:28,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:28,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:28,343 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2021-11-13 18:09:28,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:28,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54671062] [2021-11-13 18:09:28,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:28,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:28,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:28,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54671062] [2021-11-13 18:09:28,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54671062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:28,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:28,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:09:28,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047727313] [2021-11-13 18:09:28,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:28,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:09:28,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:09:28,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:09:28,643 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2021-11-13 18:09:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:28,683 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2021-11-13 18:09:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:09:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 [2021-11-13 18:09:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:28,695 INFO L225 Difference]: With dead ends: 54 [2021-11-13 18:09:28,695 INFO L226 Difference]: Without dead ends: 25 [2021-11-13 18:09:28,699 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 [2021-11-13 18:09:28,704 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:28,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:09:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-13 18:09:28,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-13 18:09:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2021-11-13 18:09:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-11-13 18:09:28,745 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2021-11-13 18:09:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:28,746 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-11-13 18:09:28,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2021-11-13 18:09:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-11-13 18:09:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:09:28,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:28,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:28,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:09:28,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:28,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:28,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2021-11-13 18:09:28,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:28,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915482829] [2021-11-13 18:09:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:28,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:28,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:28,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915482829] [2021-11-13 18:09:28,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915482829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:28,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:28,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:09:28,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184608609] [2021-11-13 18:09:28,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:28,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:09:28,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:09:28,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:09:28,893 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-11-13 18:09:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:28,944 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-11-13 18:09:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-13 18:09:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:28,946 INFO L225 Difference]: With dead ends: 64 [2021-11-13 18:09:28,947 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 18:09:28,947 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 [2021-11-13 18:09:28,949 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:28,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 22 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 37.77ms Time] [2021-11-13 18:09:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 18:09:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2021-11-13 18:09:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 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) [2021-11-13 18:09:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-11-13 18:09:28,959 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2021-11-13 18:09:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:28,959 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-11-13 18:09:28,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-11-13 18:09:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-11-13 18:09:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:09:28,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:28,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:28,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:09:28,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2021-11-13 18:09:28,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:28,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604849539] [2021-11-13 18:09:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:28,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:29,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:29,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604849539] [2021-11-13 18:09:29,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604849539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:29,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044609648] [2021-11-13 18:09:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:29,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:29,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:29,164 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:29,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:09:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:29,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:09:29,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:09:29,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:09:29,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044609648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:29,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:09:29,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-13 18:09:29,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481074524] [2021-11-13 18:09:29,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:29,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:09:29,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:29,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:09:29,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:29,429 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-11-13 18:09:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:29,508 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-11-13 18:09:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:09:29,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) Word has length 17 [2021-11-13 18:09:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:29,512 INFO L225 Difference]: With dead ends: 52 [2021-11-13 18:09:29,512 INFO L226 Difference]: Without dead ends: 48 [2021-11-13 18:09:29,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:29,514 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:29,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 124 Invalid, 20 Unknown, 0 Unchecked, 2.41ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 44.31ms Time] [2021-11-13 18:09:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-13 18:09:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-11-13 18:09:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 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) [2021-11-13 18:09:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2021-11-13 18:09:29,533 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2021-11-13 18:09:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:29,535 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2021-11-13 18:09:29,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-11-13 18:09:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2021-11-13 18:09:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:09:29,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:29,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:29,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:29,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:29,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:29,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2138024952, now seen corresponding path program 1 times [2021-11-13 18:09:29,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:29,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185248444] [2021-11-13 18:09:29,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:29,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:09:29,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:29,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185248444] [2021-11-13 18:09:29,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185248444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:29,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168299952] [2021-11-13 18:09:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:29,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:29,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:29,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:09:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:30,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:09:30,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:09:30,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:09:30,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168299952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:30,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:09:30,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 18:09:30,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100118053] [2021-11-13 18:09:30,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:30,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:09:30,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:30,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:09:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:09:30,188 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:30,252 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2021-11-13 18:09:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:09:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-13 18:09:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:30,256 INFO L225 Difference]: With dead ends: 97 [2021-11-13 18:09:30,257 INFO L226 Difference]: Without dead ends: 69 [2021-11-13 18:09:30,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:09:30,261 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:30,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 73 Invalid, 31 Unknown, 0 Unchecked, 3.65ms Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 41.10ms Time] [2021-11-13 18:09:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-13 18:09:30,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2021-11-13 18:09:30,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2021-11-13 18:09:30,280 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 23 [2021-11-13 18:09:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:30,281 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2021-11-13 18:09:30,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2021-11-13 18:09:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:09:30,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:30,283 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:30,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-13 18:09:30,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:30,496 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:30,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1093571635, now seen corresponding path program 1 times [2021-11-13 18:09:30,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:30,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770675612] [2021-11-13 18:09:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:30,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:09:30,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:30,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770675612] [2021-11-13 18:09:30,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770675612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:30,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843125768] [2021-11-13 18:09:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:30,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:30,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:30,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:30,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:09:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:09:30,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:30,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 18:09:30,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-13 18:09:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:09:30,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:09:31,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843125768] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:31,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:09:31,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2021-11-13 18:09:31,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829438236] [2021-11-13 18:09:31,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:31,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:09:31,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:31,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:09:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:09:31,094 INFO L87 Difference]: Start difference. First operand 42 states and 55 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) [2021-11-13 18:09:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:31,278 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2021-11-13 18:09:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:09:31,280 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 24 [2021-11-13 18:09:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:31,281 INFO L225 Difference]: With dead ends: 61 [2021-11-13 18:09:31,281 INFO L226 Difference]: Without dead ends: 40 [2021-11-13 18:09:31,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:09:31,283 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.68ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:31,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 56 Unknown, 0 Unchecked, 2.68ms Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 74.11ms Time] [2021-11-13 18:09:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-13 18:09:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-13 18:09:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 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) [2021-11-13 18:09:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2021-11-13 18:09:31,293 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2021-11-13 18:09:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:31,294 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2021-11-13 18:09:31,294 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) [2021-11-13 18:09:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2021-11-13 18:09:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-13 18:09:31,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:31,296 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:31,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:31,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:31,512 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1875229501, now seen corresponding path program 1 times [2021-11-13 18:09:31,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:31,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077903097] [2021-11-13 18:09:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:31,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:09:31,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:31,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077903097] [2021-11-13 18:09:31,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077903097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:31,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753306894] [2021-11-13 18:09:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:31,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:31,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:31,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:31,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:09:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:09:31,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:31,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 18:09:31,829 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 16 treesize of output 8 [2021-11-13 18:09:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:09:31,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:09:32,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753306894] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:32,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:09:32,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2021-11-13 18:09:32,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418976999] [2021-11-13 18:09:32,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:32,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:09:32,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:32,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:09:32,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:09:32,066 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2021-11-13 18:09:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:32,242 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2021-11-13 18:09:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:09:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 25 [2021-11-13 18:09:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:32,244 INFO L225 Difference]: With dead ends: 66 [2021-11-13 18:09:32,244 INFO L226 Difference]: Without dead ends: 62 [2021-11-13 18:09:32,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:09:32,246 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.43ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:32,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 65 Invalid, 61 Unknown, 0 Unchecked, 4.43ms Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 82.04ms Time] [2021-11-13 18:09:32,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-13 18:09:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-11-13 18:09:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2021-11-13 18:09:32,253 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2021-11-13 18:09:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:32,254 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-11-13 18:09:32,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2021-11-13 18:09:32,254 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2021-11-13 18:09:32,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 18:09:32,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:32,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:32,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:32,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:32,480 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1536847246, now seen corresponding path program 1 times [2021-11-13 18:09:32,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:32,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443460070] [2021-11-13 18:09:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:32,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:09:32,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:32,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443460070] [2021-11-13 18:09:32,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443460070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:32,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796034839] [2021-11-13 18:09:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:32,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:32,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:32,550 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:32,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:09:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:09:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:09:32,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:09:32,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796034839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:32,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:09:32,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2021-11-13 18:09:32,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492394700] [2021-11-13 18:09:32,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:32,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:09:32,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:32,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:09:32,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:32,764 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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) [2021-11-13 18:09:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:33,013 INFO L93 Difference]: Finished difference Result 220 states and 289 transitions. [2021-11-13 18:09:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:09:33,016 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-13 18:09:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:33,018 INFO L225 Difference]: With dead ends: 220 [2021-11-13 18:09:33,018 INFO L226 Difference]: Without dead ends: 183 [2021-11-13 18:09:33,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:09:33,019 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 228 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.76ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:33,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 169 Invalid, 152 Unknown, 0 Unchecked, 2.76ms Time], IncrementalHoareTripleChecker [29 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 145.45ms Time] [2021-11-13 18:09:33,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-13 18:09:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 48. [2021-11-13 18:09:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 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) [2021-11-13 18:09:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-11-13 18:09:33,030 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 26 [2021-11-13 18:09:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:33,030 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-11-13 18:09:33,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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) [2021-11-13 18:09:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-11-13 18:09:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 18:09:33,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:33,032 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:33,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:33,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:33,248 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:33,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1845688875, now seen corresponding path program 2 times [2021-11-13 18:09:33,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:33,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290261093] [2021-11-13 18:09:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:33,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:09:33,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:33,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290261093] [2021-11-13 18:09:33,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290261093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:33,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416424865] [2021-11-13 18:09:33,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:09:33,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:33,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:33,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:33,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:09:33,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:09:33,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:09:33,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:09:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:09:33,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 18:09:33,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416424865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:33,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:09:33,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 10 [2021-11-13 18:09:33,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444940923] [2021-11-13 18:09:33,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:33,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:09:33,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:33,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:09:33,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:09:33,653 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:34,459 INFO L93 Difference]: Finished difference Result 390 states and 517 transitions. [2021-11-13 18:09:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:09:34,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-13 18:09:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:34,462 INFO L225 Difference]: With dead ends: 390 [2021-11-13 18:09:34,462 INFO L226 Difference]: Without dead ends: 349 [2021-11-13 18:09:34,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:09:34,464 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 634 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 318.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.92ms SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 402.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:34,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 277 Invalid, 310 Unknown, 0 Unchecked, 4.92ms Time], IncrementalHoareTripleChecker [84 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 402.97ms Time] [2021-11-13 18:09:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-13 18:09:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 52. [2021-11-13 18:09:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-11-13 18:09:34,476 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 30 [2021-11-13 18:09:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:34,477 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-11-13 18:09:34,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-11-13 18:09:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 18:09:34,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:34,479 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:34,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:34,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:09:34,704 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:34,704 INFO L85 PathProgramCache]: Analyzing trace with hash -926448804, now seen corresponding path program 1 times [2021-11-13 18:09:34,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:34,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604295032] [2021-11-13 18:09:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:34,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 18:09:34,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:34,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604295032] [2021-11-13 18:09:34,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604295032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:34,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211376167] [2021-11-13 18:09:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:34,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:34,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:34,809 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:34,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:09:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:34,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:09:34,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:09:34,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:09:34,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211376167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:34,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:09:34,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-13 18:09:34,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520171488] [2021-11-13 18:09:34,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:34,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:09:34,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:34,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:09:34,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:34,941 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-11-13 18:09:34,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:34,981 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2021-11-13 18:09:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:34,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-13 18:09:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:34,982 INFO L225 Difference]: With dead ends: 94 [2021-11-13 18:09:34,982 INFO L226 Difference]: Without dead ends: 64 [2021-11-13 18:09:34,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:34,984 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.24ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:34,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.24ms Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 32.97ms Time] [2021-11-13 18:09:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-13 18:09:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-11-13 18:09:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 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) [2021-11-13 18:09:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-11-13 18:09:34,994 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 33 [2021-11-13 18:09:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:34,994 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-11-13 18:09:34,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-11-13 18:09:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-11-13 18:09:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 18:09:34,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:34,996 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:35,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:35,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:35,212 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:35,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:35,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1399324024, now seen corresponding path program 3 times [2021-11-13 18:09:35,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:35,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74527956] [2021-11-13 18:09:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:35,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:09:35,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:35,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74527956] [2021-11-13 18:09:35,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74527956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:35,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97113688] [2021-11-13 18:09:35,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:09:35,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:35,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:35,332 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:35,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:09:35,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 18:09:35,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:09:35,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:09:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:35,825 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-13 18:09:35,825 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 23 treesize of output 16 [2021-11-13 18:09:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:09:35,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:36,076 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:09:36,076 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 1 [2021-11-13 18:09:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:09:36,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97113688] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:36,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:09:36,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 10] total 19 [2021-11-13 18:09:36,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659292513] [2021-11-13 18:09:36,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:36,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:09:36,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:09:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:09:36,104 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2021-11-13 18:09:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:36,227 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2021-11-13 18:09:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:09:36,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-13 18:09:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:36,229 INFO L225 Difference]: With dead ends: 90 [2021-11-13 18:09:36,229 INFO L226 Difference]: Without dead ends: 69 [2021-11-13 18:09:36,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:09:36,230 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:36,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 79 Invalid, 63 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 60.22ms Time] [2021-11-13 18:09:36,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-13 18:09:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2021-11-13 18:09:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-11-13 18:09:36,246 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 34 [2021-11-13 18:09:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:36,246 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-11-13 18:09:36,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2021-11-13 18:09:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-11-13 18:09:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:09:36,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:36,250 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:36,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:36,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:09:36,476 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1076823445, now seen corresponding path program 1 times [2021-11-13 18:09:36,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:36,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133613102] [2021-11-13 18:09:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:36,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 18:09:36,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:36,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133613102] [2021-11-13 18:09:36,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133613102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:36,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821950604] [2021-11-13 18:09:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:36,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:36,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:36,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:36,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:09:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:36,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:09:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 18:09:36,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:09:36,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821950604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:36,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:09:36,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2021-11-13 18:09:36,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473166180] [2021-11-13 18:09:36,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:36,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:09:36,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:09:36,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:09:36,965 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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) [2021-11-13 18:09:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:38,039 INFO L93 Difference]: Finished difference Result 432 states and 552 transitions. [2021-11-13 18:09:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 18:09:38,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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 36 [2021-11-13 18:09:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:38,044 INFO L225 Difference]: With dead ends: 432 [2021-11-13 18:09:38,044 INFO L226 Difference]: Without dead ends: 382 [2021-11-13 18:09:38,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:09:38,047 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 459 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 531.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.83ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 638.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:38,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 926 Invalid, 963 Unknown, 0 Unchecked, 9.83ms Time], IncrementalHoareTripleChecker [74 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 638.07ms Time] [2021-11-13 18:09:38,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-13 18:09:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 69. [2021-11-13 18:09:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-11-13 18:09:38,075 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 36 [2021-11-13 18:09:38,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:38,079 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-11-13 18:09:38,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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) [2021-11-13 18:09:38,079 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-11-13 18:09:38,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:09:38,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:38,083 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:38,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:38,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:09:38,291 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1408390255, now seen corresponding path program 1 times [2021-11-13 18:09:38,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:38,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054869294] [2021-11-13 18:09:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:38,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 18:09:38,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:38,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054869294] [2021-11-13 18:09:38,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054869294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:38,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112329751] [2021-11-13 18:09:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:38,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:38,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:38,425 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:38,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:09:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:38,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 18:09:38,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:38,848 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:09:38,849 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 10 [2021-11-13 18:09:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:09:38,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:39,237 INFO L354 Elim1Store]: treesize reduction 37, result has 75.5 percent of original size [2021-11-13 18:09:39,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 138 [2021-11-13 18:09:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:09:39,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112329751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:39,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:09:39,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2021-11-13 18:09:39,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322887353] [2021-11-13 18:09:39,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:39,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:09:39,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:09:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:09:39,664 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 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) [2021-11-13 18:09:41,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:41,198 INFO L93 Difference]: Finished difference Result 549 states and 725 transitions. [2021-11-13 18:09:41,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 18:09:41,199 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 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) Word has length 38 [2021-11-13 18:09:41,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:41,202 INFO L225 Difference]: With dead ends: 549 [2021-11-13 18:09:41,202 INFO L226 Difference]: Without dead ends: 491 [2021-11-13 18:09:41,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:09:41,205 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 610 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 525.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.05ms SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 634.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:41,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 562 Invalid, 766 Unknown, 0 Unchecked, 9.05ms Time], IncrementalHoareTripleChecker [201 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 634.41ms Time] [2021-11-13 18:09:41,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-13 18:09:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 95. [2021-11-13 18:09:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 94 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2021-11-13 18:09:41,246 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 38 [2021-11-13 18:09:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:41,247 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2021-11-13 18:09:41,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 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) [2021-11-13 18:09:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2021-11-13 18:09:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 18:09:41,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:41,253 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:41,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:41,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 18:09:41,468 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:41,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1678328275, now seen corresponding path program 1 times [2021-11-13 18:09:41,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:41,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201796427] [2021-11-13 18:09:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:41,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 18:09:41,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:41,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201796427] [2021-11-13 18:09:41,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201796427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:41,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708275922] [2021-11-13 18:09:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:41,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:41,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:41,530 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:41,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:09:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:09:41,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:41,913 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:09:41,914 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 27 treesize of output 15 [2021-11-13 18:09:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:09:41,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:42,264 INFO L354 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2021-11-13 18:09:42,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 135 [2021-11-13 18:09:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 18:09:42,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708275922] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:42,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:09:42,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 18 [2021-11-13 18:09:42,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68727564] [2021-11-13 18:09:42,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:42,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:09:42,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:09:42,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:09:42,682 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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) [2021-11-13 18:09:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:43,327 INFO L93 Difference]: Finished difference Result 313 states and 431 transitions. [2021-11-13 18:09:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:09:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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 40 [2021-11-13 18:09:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:43,330 INFO L225 Difference]: With dead ends: 313 [2021-11-13 18:09:43,330 INFO L226 Difference]: Without dead ends: 241 [2021-11-13 18:09:43,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:09:43,332 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 213 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 234.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.53ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 286.52ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:43,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 274 Invalid, 345 Unknown, 0 Unchecked, 3.53ms Time], IncrementalHoareTripleChecker [74 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 286.52ms Time] [2021-11-13 18:09:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-13 18:09:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 127. [2021-11-13 18:09:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 126 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2021-11-13 18:09:43,360 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 40 [2021-11-13 18:09:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:43,361 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2021-11-13 18:09:43,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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) [2021-11-13 18:09:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2021-11-13 18:09:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:09:43,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:43,363 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:43,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:43,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:43,580 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 2 times [2021-11-13 18:09:43,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:43,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062438923] [2021-11-13 18:09:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:43,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 18:09:43,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:43,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062438923] [2021-11-13 18:09:43,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062438923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:43,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199021087] [2021-11-13 18:09:43,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:09:43,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:43,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:43,820 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:43,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:09:43,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:09:43,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:09:43,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:09:43,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:09:44,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 18:09:44,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199021087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:44,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:09:44,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2021-11-13 18:09:44,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842885624] [2021-11-13 18:09:44,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:44,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:09:44,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:09:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:09:44,456 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:45,765 INFO L93 Difference]: Finished difference Result 537 states and 691 transitions. [2021-11-13 18:09:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 18:09:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-13 18:09:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:45,770 INFO L225 Difference]: With dead ends: 537 [2021-11-13 18:09:45,771 INFO L226 Difference]: Without dead ends: 531 [2021-11-13 18:09:45,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:09:45,774 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 503 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 663.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.70ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 785.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:45,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 1147 Invalid, 1151 Unknown, 0 Unchecked, 11.70ms Time], IncrementalHoareTripleChecker [77 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 785.19ms Time] [2021-11-13 18:09:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-13 18:09:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 165. [2021-11-13 18:09:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2804878048780488) internal successors, (210), 164 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2021-11-13 18:09:45,820 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 46 [2021-11-13 18:09:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:45,820 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2021-11-13 18:09:45,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2021-11-13 18:09:45,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:09:45,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:45,822 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:45,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:46,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:46,044 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2021-11-13 18:09:46,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:46,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767424682] [2021-11-13 18:09:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:46,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:09:47,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:47,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767424682] [2021-11-13 18:09:47,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767424682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:47,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613530216] [2021-11-13 18:09:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:47,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:47,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:47,112 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:47,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:09:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:47,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 18:09:47,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:53,922 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-11-13 18:09:53,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 193 treesize of output 249 [2021-11-13 18:09:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:09:54,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:57,111 INFO L354 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2021-11-13 18:09:57,111 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 224 treesize of output 1 [2021-11-13 18:09:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 18:09:57,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613530216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:57,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:09:57,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 12] total 31 [2021-11-13 18:09:57,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564831249] [2021-11-13 18:09:57,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:57,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:09:57,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:57,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:09:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:09:57,141 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:00,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:00,007 INFO L93 Difference]: Finished difference Result 299 states and 384 transitions. [2021-11-13 18:10:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:10:00,008 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-13 18:10:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:00,010 INFO L225 Difference]: With dead ends: 299 [2021-11-13 18:10:00,010 INFO L226 Difference]: Without dead ends: 237 [2021-11-13 18:10:00,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:10:00,012 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 214.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:00,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 207 Invalid, 409 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 0 Unknown, 207 Unchecked, 214.68ms Time] [2021-11-13 18:10:00,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-13 18:10:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 190. [2021-11-13 18:10:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.2751322751322751) internal successors, (241), 189 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 241 transitions. [2021-11-13 18:10:00,053 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 241 transitions. Word has length 46 [2021-11-13 18:10:00,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:00,053 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 241 transitions. [2021-11-13 18:10:00,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:00,054 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 241 transitions. [2021-11-13 18:10:00,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:10:00,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:00,055 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:00,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:00,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:10:00,260 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2021-11-13 18:10:00,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:00,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463774383] [2021-11-13 18:10:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:00,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:10:00,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:00,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463774383] [2021-11-13 18:10:00,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463774383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:00,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10022262] [2021-11-13 18:10:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:00,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:00,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:10:00,965 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:10:00,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:10:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 18:10:01,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:07,435 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-11-13 18:10:07,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2021-11-13 18:10:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:10:10,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:12,365 INFO L354 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2021-11-13 18:10:12,365 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 224 treesize of output 1 [2021-11-13 18:10:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 18:10:12,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10022262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:10:12,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:10:12,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 13] total 31 [2021-11-13 18:10:12,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006065216] [2021-11-13 18:10:12,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:12,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:10:12,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:10:12,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:10:12,392 INFO L87 Difference]: Start difference. First operand 190 states and 241 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:21,351 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:10:21,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:21,495 INFO L93 Difference]: Finished difference Result 392 states and 511 transitions. [2021-11-13 18:10:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 18:10:21,496 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-13 18:10:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:21,499 INFO L225 Difference]: With dead ends: 392 [2021-11-13 18:10:21,499 INFO L226 Difference]: Without dead ends: 353 [2021-11-13 18:10:21,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=502, Invalid=1754, Unknown=0, NotChecked=0, Total=2256 [2021-11-13 18:10:21,501 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 140 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 191.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:21,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 195 Invalid, 431 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [46 Valid, 149 Invalid, 0 Unknown, 236 Unchecked, 191.61ms Time] [2021-11-13 18:10:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-13 18:10:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 191. [2021-11-13 18:10:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.268421052631579) internal successors, (241), 190 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 241 transitions. [2021-11-13 18:10:21,553 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 241 transitions. Word has length 46 [2021-11-13 18:10:21,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:21,553 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 241 transitions. [2021-11-13 18:10:21,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 241 transitions. [2021-11-13 18:10:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:10:21,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:21,555 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:21,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:21,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:10:21,768 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash -404220840, now seen corresponding path program 1 times [2021-11-13 18:10:21,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:21,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132858934] [2021-11-13 18:10:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:21,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:10:23,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:23,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132858934] [2021-11-13 18:10:23,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132858934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:23,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052010989] [2021-11-13 18:10:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:23,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:23,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:10:23,704 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:10:23,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 18:10:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:23,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 18:10:23,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:24,248 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-13 18:10:24,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 19 [2021-11-13 18:10:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:10:24,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:26,537 INFO L354 Elim1Store]: treesize reduction 41, result has 75.4 percent of original size [2021-11-13 18:10:26,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 150 [2021-11-13 18:10:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 18:10:26,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052010989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:10:26,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:10:26,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 32 [2021-11-13 18:10:26,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151264248] [2021-11-13 18:10:26,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:26,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 18:10:26,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:26,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 18:10:26,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=819, Unknown=2, NotChecked=0, Total=992 [2021-11-13 18:10:26,867 INFO L87 Difference]: Start difference. First operand 191 states and 241 transitions. Second operand has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 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) [2021-11-13 18:10:42,713 WARN L227 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:10:49,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:49,227 INFO L93 Difference]: Finished difference Result 1189 states and 1554 transitions. [2021-11-13 18:10:49,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-13 18:10:49,229 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 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) Word has length 46 [2021-11-13 18:10:49,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:49,234 INFO L225 Difference]: With dead ends: 1189 [2021-11-13 18:10:49,234 INFO L226 Difference]: Without dead ends: 896 [2021-11-13 18:10:49,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=1313, Invalid=5005, Unknown=2, NotChecked=0, Total=6320 [2021-11-13 18:10:49,238 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 513 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 778.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.84ms SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 920.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:49,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 423 Invalid, 1254 Unknown, 0 Unchecked, 5.84ms Time], IncrementalHoareTripleChecker [327 Valid, 701 Invalid, 0 Unknown, 226 Unchecked, 920.22ms Time] [2021-11-13 18:10:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-11-13 18:10:49,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 470. [2021-11-13 18:10:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.302771855010661) internal successors, (611), 469 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 611 transitions. [2021-11-13 18:10:49,392 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 611 transitions. Word has length 46 [2021-11-13 18:10:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:49,392 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 611 transitions. [2021-11-13 18:10:49,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 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) [2021-11-13 18:10:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 611 transitions. [2021-11-13 18:10:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:10:49,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:49,394 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:49,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:49,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:10:49,616 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:49,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash -661577384, now seen corresponding path program 1 times [2021-11-13 18:10:49,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:49,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768354540] [2021-11-13 18:10:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:49,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:10:51,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:51,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768354540] [2021-11-13 18:10:51,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768354540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:51,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776955962] [2021-11-13 18:10:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:51,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:51,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:10:51,684 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:10:51,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 18:10:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 18:10:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:52,250 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-13 18:10:52,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 20 [2021-11-13 18:10:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:10:52,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:54,673 INFO L354 Elim1Store]: treesize reduction 50, result has 70.1 percent of original size [2021-11-13 18:10:54,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 140 [2021-11-13 18:10:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 18:10:55,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776955962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:10:55,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:10:55,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 32 [2021-11-13 18:10:55,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725938198] [2021-11-13 18:10:55,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:55,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 18:10:55,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:55,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 18:10:55,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=819, Unknown=2, NotChecked=0, Total=992 [2021-11-13 18:10:55,340 INFO L87 Difference]: Start difference. First operand 470 states and 611 transitions. Second operand has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 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) [2021-11-13 18:11:02,514 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 108 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:11:16,921 WARN L227 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 55 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:11:23,563 WARN L227 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 112 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:11:31,917 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:11:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:32,804 INFO L93 Difference]: Finished difference Result 1272 states and 1637 transitions. [2021-11-13 18:11:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-13 18:11:32,805 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 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) Word has length 46 [2021-11-13 18:11:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:32,810 INFO L225 Difference]: With dead ends: 1272 [2021-11-13 18:11:32,810 INFO L226 Difference]: Without dead ends: 926 [2021-11-13 18:11:32,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=1396, Invalid=5405, Unknown=5, NotChecked=0, Total=6806 [2021-11-13 18:11:32,813 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 509 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 635.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.09ms SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 726.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:32,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 379 Invalid, 1107 Unknown, 0 Unchecked, 4.09ms Time], IncrementalHoareTripleChecker [286 Valid, 630 Invalid, 0 Unknown, 191 Unchecked, 726.58ms Time] [2021-11-13 18:11:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-11-13 18:11:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 541. [2021-11-13 18:11:32,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.2518518518518518) internal successors, (676), 540 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:11:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 676 transitions. [2021-11-13 18:11:32,970 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 676 transitions. Word has length 46 [2021-11-13 18:11:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:32,970 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 676 transitions. [2021-11-13 18:11:32,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 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) [2021-11-13 18:11:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 676 transitions. [2021-11-13 18:11:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:11:32,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:32,972 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:32,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:33,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:11:33,188 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:33,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:33,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1978872450, now seen corresponding path program 1 times [2021-11-13 18:11:33,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:33,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643427276] [2021-11-13 18:11:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:33,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:11:33,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:33,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643427276] [2021-11-13 18:11:33,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643427276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:11:33,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750770933] [2021-11-13 18:11:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:33,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:11:33,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:11:33,297 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:11:33,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 18:11:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:11:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 18:11:33,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:11:33,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750770933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:11:33,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:11:33,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2021-11-13 18:11:33,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665932502] [2021-11-13 18:11:33,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:11:33,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:11:33,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:33,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:11:33,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:11:33,721 INFO L87 Difference]: Start difference. First operand 541 states and 676 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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) [2021-11-13 18:11:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:33,990 INFO L93 Difference]: Finished difference Result 788 states and 966 transitions. [2021-11-13 18:11:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:11:33,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 55 [2021-11-13 18:11:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:33,994 INFO L225 Difference]: With dead ends: 788 [2021-11-13 18:11:33,994 INFO L226 Difference]: Without dead ends: 426 [2021-11-13 18:11:33,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:11:33,995 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 199 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.89ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:33,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 198 Invalid, 172 Unknown, 0 Unchecked, 0.89ms Time], IncrementalHoareTripleChecker [26 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 123.40ms Time] [2021-11-13 18:11:33,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-13 18:11:34,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 309. [2021-11-13 18:11:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.2370129870129871) internal successors, (381), 308 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:11:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 381 transitions. [2021-11-13 18:11:34,065 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 381 transitions. Word has length 55 [2021-11-13 18:11:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:34,065 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 381 transitions. [2021-11-13 18:11:34,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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) [2021-11-13 18:11:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 381 transitions. [2021-11-13 18:11:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:11:34,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:34,066 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:34,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:34,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:11:34,267 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:34,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1403496468, now seen corresponding path program 2 times [2021-11-13 18:11:34,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:34,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557249271] [2021-11-13 18:11:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:34,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:11:35,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:35,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557249271] [2021-11-13 18:11:35,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557249271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:11:35,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701184514] [2021-11-13 18:11:35,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:11:35,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:11:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:11:35,060 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:11:35,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 18:11:35,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:11:35,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:11:35,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-13 18:11:35,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:42,480 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-11-13 18:11:42,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2021-11-13 18:11:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:11:46,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 18:11:48,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701184514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:11:48,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:11:48,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2021-11-13 18:11:48,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107657590] [2021-11-13 18:11:48,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:11:48,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 18:11:48,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 18:11:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:11:48,557 INFO L87 Difference]: Start difference. First operand 309 states and 381 transitions. Second operand has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:11:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:57,709 INFO L93 Difference]: Finished difference Result 579 states and 730 transitions. [2021-11-13 18:11:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-13 18:11:57,709 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-13 18:11:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:57,711 INFO L225 Difference]: With dead ends: 579 [2021-11-13 18:11:57,712 INFO L226 Difference]: Without dead ends: 496 [2021-11-13 18:11:57,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=936, Invalid=6374, Unknown=0, NotChecked=0, Total=7310 [2021-11-13 18:11:57,714 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 238 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 386.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.36ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 444.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:57,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 322 Invalid, 909 Unknown, 0 Unchecked, 3.36ms Time], IncrementalHoareTripleChecker [85 Valid, 486 Invalid, 0 Unknown, 338 Unchecked, 444.90ms Time] [2021-11-13 18:11:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-13 18:11:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 396. [2021-11-13 18:11:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.2582278481012659) internal successors, (497), 395 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:11:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 497 transitions. [2021-11-13 18:11:57,832 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 497 transitions. Word has length 56 [2021-11-13 18:11:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:57,832 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 497 transitions. [2021-11-13 18:11:57,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:11:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 497 transitions. [2021-11-13 18:11:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:11:57,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:57,834 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:57,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:58,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:11:58,034 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash -41484349, now seen corresponding path program 3 times [2021-11-13 18:11:58,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:58,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272175081] [2021-11-13 18:11:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:58,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 18:11:59,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:59,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272175081] [2021-11-13 18:11:59,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272175081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:11:59,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674277674] [2021-11-13 18:11:59,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:11:59,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:11:59,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:11:59,492 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:11:59,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 18:11:59,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:11:59,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:11:59,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:11:59,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:59,889 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 16 treesize of output 8 [2021-11-13 18:11:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:11:59,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:00,185 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-13 18:12:00,185 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 52 treesize of output 34 [2021-11-13 18:12:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:12:00,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674277674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:12:00,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:12:00,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 9] total 34 [2021-11-13 18:12:00,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468827359] [2021-11-13 18:12:00,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:12:00,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:12:00,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:12:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:12:00,257 INFO L87 Difference]: Start difference. First operand 396 states and 497 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 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) [2021-11-13 18:12:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:02,464 INFO L93 Difference]: Finished difference Result 2023 states and 2638 transitions. [2021-11-13 18:12:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 18:12:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 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 57 [2021-11-13 18:12:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:02,474 INFO L225 Difference]: With dead ends: 2023 [2021-11-13 18:12:02,474 INFO L226 Difference]: Without dead ends: 1751 [2021-11-13 18:12:02,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=677, Invalid=3229, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 18:12:02,477 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 631 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 512.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.99ms SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 633.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:02,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 521 Invalid, 1023 Unknown, 0 Unchecked, 3.99ms Time], IncrementalHoareTripleChecker [194 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 633.46ms Time] [2021-11-13 18:12:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-11-13 18:12:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 601. [2021-11-13 18:12:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 1.2933333333333332) internal successors, (776), 600 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 776 transitions. [2021-11-13 18:12:02,677 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 776 transitions. Word has length 57 [2021-11-13 18:12:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:02,677 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 776 transitions. [2021-11-13 18:12:02,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 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) [2021-11-13 18:12:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 776 transitions. [2021-11-13 18:12:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:12:02,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:02,680 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:02,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:02,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:02,884 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash -793949111, now seen corresponding path program 4 times [2021-11-13 18:12:02,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:02,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792558090] [2021-11-13 18:12:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:02,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:12:03,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:03,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792558090] [2021-11-13 18:12:03,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792558090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:03,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986738701] [2021-11-13 18:12:03,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:12:03,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:03,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:03,013 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:03,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 18:12:03,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:12:03,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:12:03,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:12:03,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 18:12:03,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-13 18:12:03,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986738701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:12:03,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:12:03,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 23 [2021-11-13 18:12:03,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122858544] [2021-11-13 18:12:03,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:12:03,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:12:03,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:03,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:12:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:12:03,669 INFO L87 Difference]: Start difference. First operand 601 states and 776 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) [2021-11-13 18:12:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:10,643 INFO L93 Difference]: Finished difference Result 4120 states and 5525 transitions. [2021-11-13 18:12:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-13 18:12:10,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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 58 [2021-11-13 18:12:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:10,661 INFO L225 Difference]: With dead ends: 4120 [2021-11-13 18:12:10,661 INFO L226 Difference]: Without dead ends: 3686 [2021-11-13 18:12:10,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4131 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1811, Invalid=9109, Unknown=0, NotChecked=0, Total=10920 [2021-11-13 18:12:10,667 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1206 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 898.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.69ms SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1028.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:10,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 718 Invalid, 1170 Unknown, 0 Unchecked, 5.69ms Time], IncrementalHoareTripleChecker [367 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 1028.00ms Time] [2021-11-13 18:12:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2021-11-13 18:12:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 934. [2021-11-13 18:12:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.255091103965702) internal successors, (1171), 933 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1171 transitions. [2021-11-13 18:12:11,092 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1171 transitions. Word has length 58 [2021-11-13 18:12:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:11,092 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1171 transitions. [2021-11-13 18:12:11,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) [2021-11-13 18:12:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1171 transitions. [2021-11-13 18:12:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:12:11,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:11,098 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:11,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:11,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:11,312 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash 168090165, now seen corresponding path program 5 times [2021-11-13 18:12:11,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:11,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044807775] [2021-11-13 18:12:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:11,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:12:11,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:11,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044807775] [2021-11-13 18:12:11,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044807775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:11,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556083102] [2021-11-13 18:12:11,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:12:11,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:11,520 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:11,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 18:12:15,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-13 18:12:15,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:12:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:12:15,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:15,111 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 22 treesize of output 18 [2021-11-13 18:12:15,578 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 16 treesize of output 8 [2021-11-13 18:12:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:12:15,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-13 18:12:16,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556083102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:12:16,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:12:16,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 32 [2021-11-13 18:12:16,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444916005] [2021-11-13 18:12:16,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:12:16,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 18:12:16,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:16,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 18:12:16,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:12:16,242 INFO L87 Difference]: Start difference. First operand 934 states and 1171 transitions. Second operand has 32 states, 32 states have (on average 3.90625) internal successors, (125), 32 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) [2021-11-13 18:12:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:20,116 INFO L93 Difference]: Finished difference Result 5364 states and 7044 transitions. [2021-11-13 18:12:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-13 18:12:20,116 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.90625) internal successors, (125), 32 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 66 [2021-11-13 18:12:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:20,135 INFO L225 Difference]: With dead ends: 5364 [2021-11-13 18:12:20,135 INFO L226 Difference]: Without dead ends: 5124 [2021-11-13 18:12:20,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=716, Invalid=4540, Unknown=0, NotChecked=0, Total=5256 [2021-11-13 18:12:20,138 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 1309 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 2664 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1236.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 2846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.38ms SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1469.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:20,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1309 Valid, 3139 Invalid, 2846 Unknown, 0 Unchecked, 10.38ms Time], IncrementalHoareTripleChecker [182 Valid, 2664 Invalid, 0 Unknown, 0 Unchecked, 1469.89ms Time] [2021-11-13 18:12:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5124 states. [2021-11-13 18:12:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5124 to 1091. [2021-11-13 18:12:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 1.2532110091743118) internal successors, (1366), 1090 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1366 transitions. [2021-11-13 18:12:20,620 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1366 transitions. Word has length 66 [2021-11-13 18:12:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:20,620 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1366 transitions. [2021-11-13 18:12:20,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.90625) internal successors, (125), 32 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) [2021-11-13 18:12:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1366 transitions. [2021-11-13 18:12:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:12:20,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:20,624 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:20,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:20,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 18:12:20,835 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1786130607, now seen corresponding path program 6 times [2021-11-13 18:12:20,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:20,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492885297] [2021-11-13 18:12:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:20,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 18:12:22,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:22,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492885297] [2021-11-13 18:12:22,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492885297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:22,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502941948] [2021-11-13 18:12:22,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:12:22,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:22,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:22,773 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:22,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 18:12:22,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-13 18:12:22,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:12:22,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 18:12:22,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:23,825 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-13 18:12:23,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 19 [2021-11-13 18:12:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 18:12:23,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:24,459 INFO L354 Elim1Store]: treesize reduction 101, result has 36.5 percent of original size [2021-11-13 18:12:24,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 82 [2021-11-13 18:12:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 18:12:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502941948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:12:24,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:12:24,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 41 [2021-11-13 18:12:24,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241239069] [2021-11-13 18:12:24,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:12:24,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:12:24,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:12:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:12:24,720 INFO L87 Difference]: Start difference. First operand 1091 states and 1366 transitions. Second operand has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:31,303 INFO L93 Difference]: Finished difference Result 3076 states and 3967 transitions. [2021-11-13 18:12:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-13 18:12:31,304 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-13 18:12:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:31,313 INFO L225 Difference]: With dead ends: 3076 [2021-11-13 18:12:31,314 INFO L226 Difference]: Without dead ends: 2765 [2021-11-13 18:12:31,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1807, Invalid=9323, Unknown=0, NotChecked=0, Total=11130 [2021-11-13 18:12:31,316 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 595 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 788.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.00ms SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 919.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:31,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 670 Invalid, 1284 Unknown, 0 Unchecked, 5.00ms Time], IncrementalHoareTripleChecker [236 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 919.87ms Time] [2021-11-13 18:12:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-11-13 18:12:31,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 1696. [2021-11-13 18:12:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 1.2631268436578171) internal successors, (2141), 1695 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2141 transitions. [2021-11-13 18:12:31,878 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2141 transitions. Word has length 67 [2021-11-13 18:12:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:31,878 INFO L470 AbstractCegarLoop]: Abstraction has 1696 states and 2141 transitions. [2021-11-13 18:12:31,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2141 transitions. [2021-11-13 18:12:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:12:31,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:31,883 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:31,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:32,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-13 18:12:32,108 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash -436746483, now seen corresponding path program 7 times [2021-11-13 18:12:32,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:32,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239825066] [2021-11-13 18:12:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:32,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:12:34,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:34,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239825066] [2021-11-13 18:12:34,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239825066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:34,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144025848] [2021-11-13 18:12:34,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:12:34,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:34,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:34,765 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:34,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 18:12:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 18:12:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:35,686 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-13 18:12:35,687 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 34 treesize of output 19 [2021-11-13 18:12:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 18:12:35,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:37,310 INFO L354 Elim1Store]: treesize reduction 49, result has 72.0 percent of original size [2021-11-13 18:12:37,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 150 [2021-11-13 18:12:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:12:37,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144025848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:12:37,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:12:37,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 44 [2021-11-13 18:12:37,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100479174] [2021-11-13 18:12:37,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:12:37,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-13 18:12:37,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-13 18:12:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1639, Unknown=1, NotChecked=0, Total=1892 [2021-11-13 18:12:37,716 INFO L87 Difference]: Start difference. First operand 1696 states and 2141 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:45,790 INFO L93 Difference]: Finished difference Result 4030 states and 5074 transitions. [2021-11-13 18:12:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-13 18:12:45,791 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 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 [2021-11-13 18:12:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:45,800 INFO L225 Difference]: With dead ends: 4030 [2021-11-13 18:12:45,800 INFO L226 Difference]: Without dead ends: 2542 [2021-11-13 18:12:45,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 118 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=997, Invalid=6142, Unknown=1, NotChecked=0, Total=7140 [2021-11-13 18:12:45,804 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 712 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 943.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.23ms SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 1111.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:45,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 769 Invalid, 2003 Unknown, 0 Unchecked, 6.23ms Time], IncrementalHoareTripleChecker [289 Valid, 1503 Invalid, 0 Unknown, 211 Unchecked, 1111.26ms Time] [2021-11-13 18:12:45,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-11-13 18:12:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1787. [2021-11-13 18:12:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 1.1898096304591266) internal successors, (2125), 1786 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 2125 transitions. [2021-11-13 18:12:46,384 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 2125 transitions. Word has length 67 [2021-11-13 18:12:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:46,385 INFO L470 AbstractCegarLoop]: Abstraction has 1787 states and 2125 transitions. [2021-11-13 18:12:46,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 2125 transitions. [2021-11-13 18:12:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:12:46,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:46,390 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:46,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:46,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-13 18:12:46,616 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash 6687953, now seen corresponding path program 8 times [2021-11-13 18:12:46,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:46,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473856207] [2021-11-13 18:12:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:46,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 18:12:48,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:48,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473856207] [2021-11-13 18:12:48,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473856207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:48,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487491601] [2021-11-13 18:12:48,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:12:48,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:48,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:48,635 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:48,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-13 18:12:48,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:12:48,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:12:48,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 18:12:48,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:49,344 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-13 18:12:49,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 20 [2021-11-13 18:12:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:12:49,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:49,785 INFO L354 Elim1Store]: treesize reduction 50, result has 68.6 percent of original size [2021-11-13 18:12:49,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 137 [2021-11-13 18:12:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 18:12:50,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487491601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:12:50,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:12:50,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 12] total 35 [2021-11-13 18:12:50,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856952012] [2021-11-13 18:12:50,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:12:50,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 18:12:50,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:50,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 18:12:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:12:50,130 INFO L87 Difference]: Start difference. First operand 1787 states and 2125 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:52,925 INFO L93 Difference]: Finished difference Result 2625 states and 3130 transitions. [2021-11-13 18:12:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-13 18:12:52,925 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-13 18:12:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:52,936 INFO L225 Difference]: With dead ends: 2625 [2021-11-13 18:12:52,936 INFO L226 Difference]: Without dead ends: 2255 [2021-11-13 18:12:52,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=700, Invalid=3856, Unknown=0, NotChecked=0, Total=4556 [2021-11-13 18:12:52,939 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 531 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 620.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.58ms SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 728.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:52,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 606 Invalid, 1259 Unknown, 0 Unchecked, 4.58ms Time], IncrementalHoareTripleChecker [194 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 728.13ms Time] [2021-11-13 18:12:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-11-13 18:12:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1627. [2021-11-13 18:12:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 1.1851168511685117) internal successors, (1927), 1626 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 1927 transitions. [2021-11-13 18:12:53,442 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 1927 transitions. Word has length 67 [2021-11-13 18:12:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:53,443 INFO L470 AbstractCegarLoop]: Abstraction has 1627 states and 1927 transitions. [2021-11-13 18:12:53,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:12:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 1927 transitions. [2021-11-13 18:12:53,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:12:53,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:53,447 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:53,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:53,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-13 18:12:53,672 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash -415204979, now seen corresponding path program 9 times [2021-11-13 18:12:53,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:53,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855141001] [2021-11-13 18:12:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:53,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:12:55,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:55,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855141001] [2021-11-13 18:12:55,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855141001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:55,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590080602] [2021-11-13 18:12:55,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:12:55,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:55,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:55,771 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:55,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-13 18:12:55,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-13 18:12:55,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:12:55,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-13 18:12:56,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:56,815 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-13 18:12:56,815 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 37 treesize of output 24 [2021-11-13 18:12:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:12:56,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 18:13:04,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590080602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:13:04,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:13:04,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 13] total 40 [2021-11-13 18:13:04,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939409377] [2021-11-13 18:13:04,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:13:04,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-13 18:13:04,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:13:04,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-13 18:13:04,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1338, Unknown=7, NotChecked=0, Total=1560 [2021-11-13 18:13:04,889 INFO L87 Difference]: Start difference. First operand 1627 states and 1927 transitions. Second operand has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:14,353 INFO L93 Difference]: Finished difference Result 2253 states and 2659 transitions. [2021-11-13 18:13:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-13 18:13:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 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 [2021-11-13 18:13:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:14,361 INFO L225 Difference]: With dead ends: 2253 [2021-11-13 18:13:14,361 INFO L226 Difference]: Without dead ends: 2016 [2021-11-13 18:13:14,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=618, Invalid=3400, Unknown=14, NotChecked=0, Total=4032 [2021-11-13 18:13:14,362 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 219 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 426.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.12ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 499.52ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:14,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 595 Invalid, 970 Unknown, 0 Unchecked, 3.12ms Time], IncrementalHoareTripleChecker [72 Valid, 669 Invalid, 0 Unknown, 229 Unchecked, 499.52ms Time] [2021-11-13 18:13:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-11-13 18:13:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1555. [2021-11-13 18:13:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 1.178893178893179) internal successors, (1832), 1554 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 1832 transitions. [2021-11-13 18:13:14,846 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 1832 transitions. Word has length 67 [2021-11-13 18:13:14,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:14,847 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 1832 transitions. [2021-11-13 18:13:14,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:14,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 1832 transitions. [2021-11-13 18:13:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:13:14,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:14,850 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:14,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:15,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-13 18:13:15,072 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:15,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1043741809, now seen corresponding path program 10 times [2021-11-13 18:13:15,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:13:15,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771085434] [2021-11-13 18:13:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:15,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:13:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 18:13:15,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:13:15,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771085434] [2021-11-13 18:13:15,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771085434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:13:15,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818075984] [2021-11-13 18:13:15,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:13:15,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:13:15,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:13:15,313 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:13:15,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 18:13:15,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:13:15,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:13:15,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 18:13:15,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:16,342 INFO L354 Elim1Store]: treesize reduction 70, result has 50.4 percent of original size [2021-11-13 18:13:16,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 120 [2021-11-13 18:13:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:13:16,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:18,242 INFO L354 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2021-11-13 18:13:18,242 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 224 treesize of output 1 [2021-11-13 18:13:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-13 18:13:18,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818075984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:13:18,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:13:18,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 12] total 37 [2021-11-13 18:13:18,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225179236] [2021-11-13 18:13:18,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:13:18,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:13:18,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:13:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:13:18,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:13:18,280 INFO L87 Difference]: Start difference. First operand 1555 states and 1832 transitions. Second operand has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:29,168 INFO L93 Difference]: Finished difference Result 2685 states and 3232 transitions. [2021-11-13 18:13:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-11-13 18:13:29,168 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 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 [2021-11-13 18:13:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:29,180 INFO L225 Difference]: With dead ends: 2685 [2021-11-13 18:13:29,180 INFO L226 Difference]: Without dead ends: 2514 [2021-11-13 18:13:29,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9874 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1858, Invalid=25532, Unknown=0, NotChecked=0, Total=27390 [2021-11-13 18:13:29,184 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 431 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 2774 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1462.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 3735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.80ms SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 804 IncrementalHoareTripleChecker+Unchecked, 1708.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:29,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 2042 Invalid, 3735 Unknown, 0 Unchecked, 9.80ms Time], IncrementalHoareTripleChecker [157 Valid, 2774 Invalid, 0 Unknown, 804 Unchecked, 1708.85ms Time] [2021-11-13 18:13:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-11-13 18:13:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1637. [2021-11-13 18:13:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 1.18520782396088) internal successors, (1939), 1636 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 1939 transitions. [2021-11-13 18:13:29,742 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 1939 transitions. Word has length 67 [2021-11-13 18:13:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:29,742 INFO L470 AbstractCegarLoop]: Abstraction has 1637 states and 1939 transitions. [2021-11-13 18:13:29,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 1939 transitions. [2021-11-13 18:13:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 18:13:29,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:29,745 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:29,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-13 18:13:29,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:13:29,972 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash -363438139, now seen corresponding path program 11 times [2021-11-13 18:13:29,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:13:29,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320170855] [2021-11-13 18:13:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:29,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:13:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 18:13:30,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:13:30,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320170855] [2021-11-13 18:13:30,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320170855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:13:30,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73508558] [2021-11-13 18:13:30,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:13:30,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:13:30,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:13:30,136 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:13:30,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-13 18:13:31,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-13 18:13:31,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:13:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:13:31,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 18:13:32,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 18:13:32,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73508558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:13:32,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:13:32,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2021-11-13 18:13:32,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575216811] [2021-11-13 18:13:32,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:13:32,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:13:32,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:13:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:13:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:13:32,206 INFO L87 Difference]: Start difference. First operand 1637 states and 1939 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:33,077 INFO L93 Difference]: Finished difference Result 2183 states and 2596 transitions. [2021-11-13 18:13:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:13:33,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-13 18:13:33,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:33,083 INFO L225 Difference]: With dead ends: 2183 [2021-11-13 18:13:33,084 INFO L226 Difference]: Without dead ends: 1742 [2021-11-13 18:13:33,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:13:33,085 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 340 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 174.67ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:33,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 311 Invalid, 281 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [46 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 174.67ms Time] [2021-11-13 18:13:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-11-13 18:13:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1337. [2021-11-13 18:13:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 1.2080838323353293) internal successors, (1614), 1336 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1614 transitions. [2021-11-13 18:13:33,541 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1614 transitions. Word has length 76 [2021-11-13 18:13:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:33,541 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 1614 transitions. [2021-11-13 18:13:33,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1614 transitions. [2021-11-13 18:13:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 18:13:33,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:33,544 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:33,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-13 18:13:33,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 18:13:33,749 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash -100514461, now seen corresponding path program 12 times [2021-11-13 18:13:33,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:13:33,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121402701] [2021-11-13 18:13:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:33,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:13:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:13:35,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:13:35,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121402701] [2021-11-13 18:13:35,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121402701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:13:35,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528827030] [2021-11-13 18:13:35,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:13:35,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:13:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:13:35,058 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:13:35,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-13 18:13:35,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-13 18:13:35,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:13:35,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 18:13:35,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 18:13:36,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:36,678 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-13 18:13:36,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2021-11-13 18:13:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:13:36,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528827030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:13:36,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:13:36,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 15] total 40 [2021-11-13 18:13:36,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414677334] [2021-11-13 18:13:36,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:13:36,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-13 18:13:36,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:13:36,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-13 18:13:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:13:36,797 INFO L87 Difference]: Start difference. First operand 1337 states and 1614 transitions. Second operand has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:41,803 INFO L93 Difference]: Finished difference Result 5461 states and 6613 transitions. [2021-11-13 18:13:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-13 18:13:41,804 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 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 [2021-11-13 18:13:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:41,812 INFO L225 Difference]: With dead ends: 5461 [2021-11-13 18:13:41,812 INFO L226 Difference]: Without dead ends: 4871 [2021-11-13 18:13:41,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1096, Invalid=3734, Unknown=0, NotChecked=0, Total=4830 [2021-11-13 18:13:41,815 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1057 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 725.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.25ms SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 817.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:41,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 668 Invalid, 877 Unknown, 0 Unchecked, 4.25ms Time], IncrementalHoareTripleChecker [192 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 817.86ms Time] [2021-11-13 18:13:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-11-13 18:13:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 1229. [2021-11-13 18:13:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 1.216612377850163) internal successors, (1494), 1228 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1494 transitions. [2021-11-13 18:13:42,286 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1494 transitions. Word has length 77 [2021-11-13 18:13:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:42,287 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 1494 transitions. [2021-11-13 18:13:42,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1494 transitions. [2021-11-13 18:13:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 18:13:42,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:42,289 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:42,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:42,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:13:42,489 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1514679456, now seen corresponding path program 13 times [2021-11-13 18:13:42,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:13:42,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965878692] [2021-11-13 18:13:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:42,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:13:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-13 18:13:42,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:13:42,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965878692] [2021-11-13 18:13:42,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965878692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:13:42,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661070702] [2021-11-13 18:13:42,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:13:42,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:13:42,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:13:42,694 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:13:42,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-13 18:13:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:42,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-13 18:13:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:44,446 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-11-13 18:13:44,446 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 63 treesize of output 40 [2021-11-13 18:13:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 18:13:44,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:46,223 INFO L354 Elim1Store]: treesize reduction 75, result has 1.3 percent of original size [2021-11-13 18:13:46,223 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 66 treesize of output 1 [2021-11-13 18:13:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-13 18:13:46,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661070702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:13:46,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:13:46,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 18] total 47 [2021-11-13 18:13:46,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137687561] [2021-11-13 18:13:46,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:13:46,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-13 18:13:46,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:13:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-13 18:13:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1859, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 18:13:46,258 INFO L87 Difference]: Start difference. First operand 1229 states and 1494 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:14:05,861 WARN L227 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 79 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:14:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:06,319 INFO L93 Difference]: Finished difference Result 3144 states and 4009 transitions. [2021-11-13 18:14:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-13 18:14:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-13 18:14:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:06,325 INFO L225 Difference]: With dead ends: 3144 [2021-11-13 18:14:06,325 INFO L226 Difference]: Without dead ends: 2986 [2021-11-13 18:14:06,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 127 SyntacticMatches, 16 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1064, Invalid=9637, Unknown=11, NotChecked=0, Total=10712 [2021-11-13 18:14:06,327 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 334 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 438.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.94ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 507.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:06,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 863 Invalid, 1301 Unknown, 0 Unchecked, 3.94ms Time], IncrementalHoareTripleChecker [40 Valid, 847 Invalid, 0 Unknown, 414 Unchecked, 507.91ms Time] [2021-11-13 18:14:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2021-11-13 18:14:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 1255. [2021-11-13 18:14:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 1.2145135566188199) internal successors, (1523), 1254 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:14:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1523 transitions. [2021-11-13 18:14:06,818 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1523 transitions. Word has length 78 [2021-11-13 18:14:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:06,818 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 1523 transitions. [2021-11-13 18:14:06,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:14:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1523 transitions. [2021-11-13 18:14:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-13 18:14:06,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:06,821 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:14:06,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-13 18:14:07,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:14:07,024 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:14:07,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1820243765, now seen corresponding path program 14 times [2021-11-13 18:14:07,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:14:07,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346544588] [2021-11-13 18:14:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:07,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:14:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-13 18:14:07,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:14:07,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346544588] [2021-11-13 18:14:07,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346544588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:14:07,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036919372] [2021-11-13 18:14:07,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:14:07,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:14:07,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:14:07,260 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:14:07,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-13 18:14:07,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:14:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:14:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 18:14:07,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:14:11,992 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-11-13 18:14:11,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2021-11-13 18:14:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-13 18:14:13,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:14:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 46 proven. 23 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-13 18:14:15,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036919372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:14:15,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:14:15,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13] total 37 [2021-11-13 18:14:15,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649010297] [2021-11-13 18:14:15,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:14:15,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:14:15,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:14:15,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:14:15,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:14:15,516 INFO L87 Difference]: Start difference. First operand 1255 states and 1523 transitions. Second operand has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:14:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:28,701 INFO L93 Difference]: Finished difference Result 5954 states and 7434 transitions. [2021-11-13 18:14:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-13 18:14:28,702 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-13 18:14:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:28,713 INFO L225 Difference]: With dead ends: 5954 [2021-11-13 18:14:28,713 INFO L226 Difference]: Without dead ends: 5840 [2021-11-13 18:14:28,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5288 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1369, Invalid=15923, Unknown=0, NotChecked=0, Total=17292 [2021-11-13 18:14:28,716 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 428 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 630.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 2235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.94ms SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 709 IncrementalHoareTripleChecker+Unchecked, 748.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:28,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 1152 Invalid, 2235 Unknown, 0 Unchecked, 5.94ms Time], IncrementalHoareTripleChecker [112 Valid, 1414 Invalid, 0 Unknown, 709 Unchecked, 748.30ms Time] [2021-11-13 18:14:28,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2021-11-13 18:14:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 1250. [2021-11-13 18:14:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.2137710168134508) internal successors, (1516), 1249 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:14:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1516 transitions. [2021-11-13 18:14:29,249 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1516 transitions. Word has length 80 [2021-11-13 18:14:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:29,249 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1516 transitions. [2021-11-13 18:14:29,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:14:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1516 transitions. [2021-11-13 18:14:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-13 18:14:29,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:29,251 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:14:29,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-13 18:14:29,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-13 18:14:29,452 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:14:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash 278727314, now seen corresponding path program 15 times [2021-11-13 18:14:29,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:14:29,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68236036] [2021-11-13 18:14:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:29,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:14:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-13 18:14:29,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:14:29,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68236036] [2021-11-13 18:14:29,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68236036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:14:29,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911599062] [2021-11-13 18:14:29,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:14:29,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:14:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:14:29,717 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:14:29,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-13 18:14:30,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-13 18:14:30,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:14:30,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:14:30,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:14:30,542 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-11-13 18:14:30,542 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 42 treesize of output 34 [2021-11-13 18:14:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-13 18:14:30,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:14:31,237 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-13 18:14:31,238 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 52 treesize of output 34 [2021-11-13 18:14:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-13 18:14:31,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911599062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:14:31,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:14:31,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 36 [2021-11-13 18:14:31,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434415885] [2021-11-13 18:14:31,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:14:31,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:14:31,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:14:31,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:14:31,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:14:31,319 INFO L87 Difference]: Start difference. First operand 1250 states and 1516 transitions. Second operand has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 36 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) [2021-11-13 18:14:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:41,559 INFO L93 Difference]: Finished difference Result 12541 states and 15839 transitions. [2021-11-13 18:14:41,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-13 18:14:41,559 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 36 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 82 [2021-11-13 18:14:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:41,583 INFO L225 Difference]: With dead ends: 12541 [2021-11-13 18:14:41,583 INFO L226 Difference]: Without dead ends: 12032 [2021-11-13 18:14:41,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1958, Invalid=12322, Unknown=0, NotChecked=0, Total=14280 [2021-11-13 18:14:41,587 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 2224 mSDsluCounter, 3108 mSDsCounter, 0 mSdLazyCounter, 3122 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1722.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2224 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 3656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.13ms SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 3122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2042.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:41,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2224 Valid, 3301 Invalid, 3656 Unknown, 0 Unchecked, 14.13ms Time], IncrementalHoareTripleChecker [534 Valid, 3122 Invalid, 0 Unknown, 0 Unchecked, 2042.60ms Time] [2021-11-13 18:14:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12032 states. [2021-11-13 18:14:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12032 to 1324. [2021-11-13 18:14:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 1.2101284958427816) internal successors, (1601), 1323 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:14:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1601 transitions. [2021-11-13 18:14:42,317 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1601 transitions. Word has length 82 [2021-11-13 18:14:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:42,317 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 1601 transitions. [2021-11-13 18:14:42,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 36 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) [2021-11-13 18:14:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1601 transitions. [2021-11-13 18:14:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:14:42,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:42,320 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:14:42,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-13 18:14:42,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-13 18:14:42,520 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:14:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1839805964, now seen corresponding path program 16 times [2021-11-13 18:14:42,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:14:42,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122352154] [2021-11-13 18:14:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:42,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:14:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:14:42,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:14:42,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122352154] [2021-11-13 18:14:42,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122352154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:14:42,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250878347] [2021-11-13 18:14:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:14:42,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:14:42,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:14:42,740 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:14:42,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-13 18:14:42,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:14:42,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:14:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:14:42,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:14:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:14:43,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:14:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:14:43,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250878347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:14:43,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:14:43,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2021-11-13 18:14:43,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161350058] [2021-11-13 18:14:43,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:14:43,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:14:43,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:14:43,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:14:43,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:14:43,763 INFO L87 Difference]: Start difference. First operand 1324 states and 1601 transitions. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:14:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:45,078 INFO L93 Difference]: Finished difference Result 2138 states and 2594 transitions. [2021-11-13 18:14:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:14:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-13 18:14:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:45,087 INFO L225 Difference]: With dead ends: 2138 [2021-11-13 18:14:45,087 INFO L226 Difference]: Without dead ends: 2134 [2021-11-13 18:14:45,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:14:45,088 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 276 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.53ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:45,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 1443 Invalid, 317 Unknown, 0 Unchecked, 2.53ms Time], IncrementalHoareTripleChecker [21 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 159.34ms Time] [2021-11-13 18:14:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-11-13 18:14:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1576. [2021-11-13 18:14:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 1.2146031746031747) internal successors, (1913), 1575 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:14:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 1913 transitions. [2021-11-13 18:14:45,856 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 1913 transitions. Word has length 88 [2021-11-13 18:14:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:45,857 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 1913 transitions. [2021-11-13 18:14:45,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:14:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 1913 transitions. [2021-11-13 18:14:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:14:45,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:45,859 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:14:45,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-13 18:14:46,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-13 18:14:46,060 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:14:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:46,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1581640526, now seen corresponding path program 17 times [2021-11-13 18:14:46,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:14:46,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004993747] [2021-11-13 18:14:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:46,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:14:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:14:48,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:14:48,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004993747] [2021-11-13 18:14:48,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004993747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:14:48,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054375254] [2021-11-13 18:14:48,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:14:48,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:14:48,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:14:48,152 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:14:48,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-13 18:14:58,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-13 18:14:58,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:14:58,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-13 18:14:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:14:58,159 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 [2021-11-13 18:14:58,188 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 [2021-11-13 18:14:58,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:15:00,743 INFO L354 Elim1Store]: treesize reduction 134, result has 2.2 percent of original size [2021-11-13 18:15:00,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 59 [2021-11-13 18:15:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 37 proven. 150 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 18:15:00,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 60 proven. 90 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 18:15:15,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054375254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:15:15,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:15:15,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 36, 28] total 81 [2021-11-13 18:15:15,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441332399] [2021-11-13 18:15:15,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:15:15,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-13 18:15:15,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:15:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-13 18:15:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=5675, Unknown=0, NotChecked=0, Total=6480 [2021-11-13 18:15:15,309 INFO L87 Difference]: Start difference. First operand 1576 states and 1913 transitions. Second operand has 81 states, 81 states have (on average 2.5308641975308643) internal successors, (205), 81 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:15:32,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:32,619 INFO L93 Difference]: Finished difference Result 4139 states and 5281 transitions. [2021-11-13 18:15:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-13 18:15:32,620 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.5308641975308643) internal successors, (205), 81 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-13 18:15:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:32,631 INFO L225 Difference]: With dead ends: 4139 [2021-11-13 18:15:32,631 INFO L226 Difference]: Without dead ends: 4025 [2021-11-13 18:15:32,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9981 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=3073, Invalid=23987, Unknown=0, NotChecked=0, Total=27060 [2021-11-13 18:15:32,634 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 421 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1086.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 3233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.95ms SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1592 IncrementalHoareTripleChecker+Unchecked, 1252.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:32,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 1508 Invalid, 3233 Unknown, 0 Unchecked, 6.95ms Time], IncrementalHoareTripleChecker [105 Valid, 1536 Invalid, 0 Unknown, 1592 Unchecked, 1252.28ms Time] [2021-11-13 18:15:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2021-11-13 18:15:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 2376. [2021-11-13 18:15:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 1.2265263157894737) internal successors, (2913), 2375 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:15:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 2913 transitions. [2021-11-13 18:15:34,046 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 2913 transitions. Word has length 88 [2021-11-13 18:15:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:34,046 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 2913 transitions. [2021-11-13 18:15:34,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.5308641975308643) internal successors, (205), 81 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:15:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 2913 transitions. [2021-11-13 18:15:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:15:34,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:34,049 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:15:34,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:34,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:15:34,250 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:34,250 INFO L85 PathProgramCache]: Analyzing trace with hash 240292206, now seen corresponding path program 18 times [2021-11-13 18:15:34,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:15:34,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770655250] [2021-11-13 18:15:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:34,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:15:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 18:15:36,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:15:36,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770655250] [2021-11-13 18:15:36,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770655250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:15:36,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647336480] [2021-11-13 18:15:36,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:15:36,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:15:36,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:15:36,414 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:15:36,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-13 18:15:36,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-13 18:15:36,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:15:36,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 18:15:36,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:15:37,954 INFO L354 Elim1Store]: treesize reduction 118, result has 5.6 percent of original size [2021-11-13 18:15:37,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 44 [2021-11-13 18:15:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 124 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:15:37,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:38,722 INFO L354 Elim1Store]: treesize reduction 47, result has 71.9 percent of original size [2021-11-13 18:15:38,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 144 [2021-11-13 18:15:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 18:15:39,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647336480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:15:39,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:15:39,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 17] total 50 [2021-11-13 18:15:39,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574335633] [2021-11-13 18:15:39,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:15:39,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-13 18:15:39,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:15:39,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-13 18:15:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2175, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:15:39,399 INFO L87 Difference]: Start difference. First operand 2376 states and 2913 transitions. Second operand has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:15:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:51,450 INFO L93 Difference]: Finished difference Result 10209 states and 12940 transitions. [2021-11-13 18:15:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-13 18:15:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-13 18:15:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:51,460 INFO L225 Difference]: With dead ends: 10209 [2021-11-13 18:15:51,460 INFO L226 Difference]: Without dead ends: 8465 [2021-11-13 18:15:51,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3665 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1445, Invalid=10987, Unknown=0, NotChecked=0, Total=12432 [2021-11-13 18:15:51,465 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 991 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1595.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.59ms SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1849.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:51,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 1291 Invalid, 2943 Unknown, 0 Unchecked, 8.59ms Time], IncrementalHoareTripleChecker [495 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 1849.84ms Time] [2021-11-13 18:15:51,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8465 states. [2021-11-13 18:15:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8465 to 3877. [2021-11-13 18:15:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3877 states, 3876 states have (on average 1.2159442724458205) internal successors, (4713), 3876 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:15:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 4713 transitions. [2021-11-13 18:15:53,680 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 4713 transitions. Word has length 88 [2021-11-13 18:15:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:53,680 INFO L470 AbstractCegarLoop]: Abstraction has 3877 states and 4713 transitions. [2021-11-13 18:15:53,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:15:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 4713 transitions. [2021-11-13 18:15:53,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:15:53,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:53,687 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:15:53,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:53,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-13 18:15:53,912 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:53,912 INFO L85 PathProgramCache]: Analyzing trace with hash 405773490, now seen corresponding path program 19 times [2021-11-13 18:15:53,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:15:53,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197001725] [2021-11-13 18:15:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:53,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:15:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:15:56,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:15:56,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197001725] [2021-11-13 18:15:56,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197001725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:15:56,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598163941] [2021-11-13 18:15:56,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:15:56,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:15:56,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:15:56,042 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:15:56,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-13 18:15:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:56,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 18:15:56,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:15:57,113 INFO L354 Elim1Store]: treesize reduction 110, result has 6.0 percent of original size [2021-11-13 18:15:57,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 45 [2021-11-13 18:15:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 128 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 18:15:57,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:57,785 INFO L354 Elim1Store]: treesize reduction 50, result has 68.6 percent of original size [2021-11-13 18:15:57,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 137 [2021-11-13 18:15:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-13 18:15:58,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598163941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:15:58,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:15:58,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 14] total 41 [2021-11-13 18:15:58,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243790374] [2021-11-13 18:15:58,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:15:58,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:15:58,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:15:58,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:15:58,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:15:58,220 INFO L87 Difference]: Start difference. First operand 3877 states and 4713 transitions. Second operand has 41 states, 41 states have (on average 4.024390243902439) internal successors, (165), 41 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:16:07,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:16:07,503 INFO L93 Difference]: Finished difference Result 12365 states and 15270 transitions. [2021-11-13 18:16:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-13 18:16:07,504 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.024390243902439) internal successors, (165), 41 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-13 18:16:07,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:16:07,513 INFO L225 Difference]: With dead ends: 12365 [2021-11-13 18:16:07,513 INFO L226 Difference]: Without dead ends: 10301 [2021-11-13 18:16:07,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 155 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=865, Invalid=5941, Unknown=0, NotChecked=0, Total=6806 [2021-11-13 18:16:07,517 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 627 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 832.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.31ms SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 989.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:16:07,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 919 Invalid, 1663 Unknown, 0 Unchecked, 5.31ms Time], IncrementalHoareTripleChecker [258 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 989.24ms Time] [2021-11-13 18:16:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10301 states. [2021-11-13 18:16:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10301 to 6591. [2021-11-13 18:16:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6591 states, 6590 states have (on average 1.235204855842185) internal successors, (8140), 6590 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:16:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6591 states to 6591 states and 8140 transitions. [2021-11-13 18:16:11,160 INFO L78 Accepts]: Start accepts. Automaton has 6591 states and 8140 transitions. Word has length 88 [2021-11-13 18:16:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:16:11,160 INFO L470 AbstractCegarLoop]: Abstraction has 6591 states and 8140 transitions. [2021-11-13 18:16:11,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.024390243902439) internal successors, (165), 41 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:16:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 6591 states and 8140 transitions. [2021-11-13 18:16:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:16:11,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:16:11,174 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:16:11,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-13 18:16:11,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:16:11,388 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:16:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:16:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash -16119442, now seen corresponding path program 20 times [2021-11-13 18:16:11,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:16:11,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381416713] [2021-11-13 18:16:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:16:11,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:16:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 18:16:13,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:16:13,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381416713] [2021-11-13 18:16:13,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381416713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:16:13,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637931129] [2021-11-13 18:16:13,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:16:13,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:16:13,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:16:13,599 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:16:13,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-13 18:16:13,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:16:13,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:16:13,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-13 18:16:13,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:16:14,895 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-11-13 18:16:14,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 45 [2021-11-13 18:16:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 144 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:16:14,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:16:17,730 INFO L354 Elim1Store]: treesize reduction 56, result has 68.0 percent of original size [2021-11-13 18:16:17,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 142 [2021-11-13 18:16:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 18:16:18,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637931129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:16:18,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:16:18,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 18] total 52 [2021-11-13 18:16:18,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405074389] [2021-11-13 18:16:18,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:16:18,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-13 18:16:18,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:16:18,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-13 18:16:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2357, Unknown=2, NotChecked=0, Total=2652 [2021-11-13 18:16:18,480 INFO L87 Difference]: Start difference. First operand 6591 states and 8140 transitions. Second operand has 52 states, 52 states have (on average 3.4038461538461537) internal successors, (177), 52 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:16:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:16:37,718 INFO L93 Difference]: Finished difference Result 12397 states and 15175 transitions. [2021-11-13 18:16:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-13 18:16:37,719 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.4038461538461537) internal successors, (177), 52 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-13 18:16:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:16:37,728 INFO L225 Difference]: With dead ends: 12397 [2021-11-13 18:16:37,728 INFO L226 Difference]: Without dead ends: 10943 [2021-11-13 18:16:37,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 156 SyntacticMatches, 18 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5588 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1647, Invalid=13357, Unknown=2, NotChecked=0, Total=15006 [2021-11-13 18:16:37,732 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1097 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1617.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.44ms SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 1877.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:16:37,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1097 Valid, 1172 Invalid, 3127 Unknown, 0 Unchecked, 10.44ms Time], IncrementalHoareTripleChecker [501 Valid, 2346 Invalid, 0 Unknown, 280 Unchecked, 1877.83ms Time] [2021-11-13 18:16:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10943 states. [2021-11-13 18:16:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10943 to 6373. [2021-11-13 18:16:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 1.2283427495291903) internal successors, (7827), 6372 states have internal predecessors, (7827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:16:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 7827 transitions. [2021-11-13 18:16:41,356 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 7827 transitions. Word has length 88 [2021-11-13 18:16:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:16:41,356 INFO L470 AbstractCegarLoop]: Abstraction has 6373 states and 7827 transitions. [2021-11-13 18:16:41,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.4038461538461537) internal successors, (177), 52 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:16:41,357 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 7827 transitions. [2021-11-13 18:16:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:16:41,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:16:41,368 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:16:41,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-13 18:16:41,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-13 18:16:41,584 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:16:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:16:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash -662653268, now seen corresponding path program 21 times [2021-11-13 18:16:41,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:16:41,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272296706] [2021-11-13 18:16:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:16:41,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:16:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:16:41,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:16:41,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272296706] [2021-11-13 18:16:41,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272296706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:16:41,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107593949] [2021-11-13 18:16:41,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:16:41,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:16:41,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:16:41,824 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:16:41,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-13 18:16:42,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-13 18:16:42,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:16:42,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-13 18:16:42,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:16:42,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-13 18:16:42,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:16:42,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:16:42,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:16:42,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:16:42,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:16:47,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:16:47,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:16:47,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:16:47,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:16:47,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:16:47,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:16:47,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:16:48,111 INFO L354 Elim1Store]: treesize reduction 436, result has 20.3 percent of original size [2021-11-13 18:16:48,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 10 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 227 treesize of output 227 [2021-11-13 18:16:48,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|] [2021-11-13 18:16:48,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:16:48,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-13 18:16:48,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392154289] [2021-11-13 18:16:48,631 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:16:48,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:16:48,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:16:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:16:48,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1742, Unknown=0, NotChecked=0, Total=1892 [2021-11-13 18:16:48,632 INFO L87 Difference]: Start difference. First operand 6373 states and 7827 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 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) [2021-11-13 18:16:54,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:16:54,943 INFO L93 Difference]: Finished difference Result 10114 states and 12462 transitions. [2021-11-13 18:16:54,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:16:54,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 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 88 [2021-11-13 18:16:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:16:54,951 INFO L225 Difference]: With dead ends: 10114 [2021-11-13 18:16:54,951 INFO L226 Difference]: Without dead ends: 10110 [2021-11-13 18:16:54,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=212, Invalid=3210, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 18:16:54,953 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 274 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.62ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 184.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:16:54,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1846 Invalid, 395 Unknown, 0 Unchecked, 3.62ms Time], IncrementalHoareTripleChecker [19 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 184.43ms Time] [2021-11-13 18:16:54,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10110 states. [2021-11-13 18:16:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10110 to 8057. [2021-11-13 18:16:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8057 states, 8056 states have (on average 1.2359731876861966) internal successors, (9957), 8056 states have internal predecessors, (9957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:16:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8057 states to 8057 states and 9957 transitions. [2021-11-13 18:16:59,485 INFO L78 Accepts]: Start accepts. Automaton has 8057 states and 9957 transitions. Word has length 88 [2021-11-13 18:16:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:16:59,485 INFO L470 AbstractCegarLoop]: Abstraction has 8057 states and 9957 transitions. [2021-11-13 18:16:59,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 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) [2021-11-13 18:16:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8057 states and 9957 transitions. [2021-11-13 18:16:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 18:16:59,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:16:59,495 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:16:59,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-13 18:16:59,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-13 18:16:59,695 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:16:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:16:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1905940107, now seen corresponding path program 22 times [2021-11-13 18:16:59,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:16:59,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682164680] [2021-11-13 18:16:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:16:59,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:16:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-13 18:16:59,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:16:59,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682164680] [2021-11-13 18:16:59,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682164680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:16:59,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242963570] [2021-11-13 18:16:59,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:16:59,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:16:59,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:16:59,976 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:16:59,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-13 18:17:00,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:17:00,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:17:00,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-13 18:17:00,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:17:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 50 proven. 117 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-13 18:17:14,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:17:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 58 proven. 51 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 18:17:20,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242963570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:17:20,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:17:20,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 33, 23] total 69 [2021-11-13 18:17:20,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678613165] [2021-11-13 18:17:20,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:17:20,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-13 18:17:20,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:17:20,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-13 18:17:20,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=4132, Unknown=16, NotChecked=0, Total=4692 [2021-11-13 18:17:20,309 INFO L87 Difference]: Start difference. First operand 8057 states and 9957 transitions. Second operand has 69 states, 69 states have (on average 2.36231884057971) internal successors, (163), 69 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:17:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:17:29,151 INFO L93 Difference]: Finished difference Result 13296 states and 16360 transitions. [2021-11-13 18:17:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:17:29,152 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.36231884057971) internal successors, (163), 69 states have internal predecessors, (163), 0 states have call successors, (0), 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 [2021-11-13 18:17:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:17:29,158 INFO L225 Difference]: With dead ends: 13296 [2021-11-13 18:17:29,158 INFO L226 Difference]: Without dead ends: 7679 [2021-11-13 18:17:29,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=681, Invalid=5783, Unknown=16, NotChecked=0, Total=6480 [2021-11-13 18:17:29,163 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 222.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.63ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 276.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:17:29,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 497 Invalid, 539 Unknown, 0 Unchecked, 2.63ms Time], IncrementalHoareTripleChecker [19 Valid, 357 Invalid, 0 Unknown, 163 Unchecked, 276.42ms Time] [2021-11-13 18:17:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2021-11-13 18:17:33,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 7637. [2021-11-13 18:17:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7637 states, 7636 states have (on average 1.2403090623363018) internal successors, (9471), 7636 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:17:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7637 states to 7637 states and 9471 transitions. [2021-11-13 18:17:33,396 INFO L78 Accepts]: Start accepts. Automaton has 7637 states and 9471 transitions. Word has length 93 [2021-11-13 18:17:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:17:33,396 INFO L470 AbstractCegarLoop]: Abstraction has 7637 states and 9471 transitions. [2021-11-13 18:17:33,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.36231884057971) internal successors, (163), 69 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:17:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 7637 states and 9471 transitions. [2021-11-13 18:17:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-13 18:17:33,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:17:33,406 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:17:33,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-13 18:17:33,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-13 18:17:33,606 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:17:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:17:33,607 INFO L85 PathProgramCache]: Analyzing trace with hash 97431714, now seen corresponding path program 23 times [2021-11-13 18:17:33,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:17:33,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951221229] [2021-11-13 18:17:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:17:33,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:17:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 58 proven. 72 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-13 18:17:33,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:17:33,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951221229] [2021-11-13 18:17:33,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951221229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:17:33,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174168167] [2021-11-13 18:17:33,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:17:33,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:17:33,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:17:33,784 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:17:33,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-13 18:17:34,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-13 18:17:34,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:17:34,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-13 18:17:34,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:17:43,496 INFO L354 Elim1Store]: treesize reduction 88, result has 65.2 percent of original size [2021-11-13 18:17:43,497 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 201 treesize of output 263 [2021-11-13 18:17:44,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|] [2021-11-13 18:17:44,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:17:44,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-13 18:17:44,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136389] [2021-11-13 18:17:44,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:17:44,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:17:44,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:17:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:17:44,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:17:44,132 INFO L87 Difference]: Start difference. First operand 7637 states and 9471 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:17:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:17:47,732 INFO L93 Difference]: Finished difference Result 10472 states and 12594 transitions. [2021-11-13 18:17:47,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:17:47,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-13 18:17:47,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:17:47,737 INFO L225 Difference]: With dead ends: 10472 [2021-11-13 18:17:47,737 INFO L226 Difference]: Without dead ends: 6246 [2021-11-13 18:17:47,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:17:47,741 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 91 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:17:47,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 317 Invalid, 236 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [14 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 127.32ms Time] [2021-11-13 18:17:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2021-11-13 18:17:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 5697. [2021-11-13 18:17:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5697 states, 5696 states have (on average 1.2110252808988764) internal successors, (6898), 5696 states have internal predecessors, (6898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:17:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5697 states to 5697 states and 6898 transitions. [2021-11-13 18:17:50,867 INFO L78 Accepts]: Start accepts. Automaton has 5697 states and 6898 transitions. Word has length 97 [2021-11-13 18:17:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:17:50,867 INFO L470 AbstractCegarLoop]: Abstraction has 5697 states and 6898 transitions. [2021-11-13 18:17:50,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:17:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 5697 states and 6898 transitions. [2021-11-13 18:17:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-13 18:17:50,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:17:50,873 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:17:50,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-13 18:17:51,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:17:51,075 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:17:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:17:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1727527548, now seen corresponding path program 24 times [2021-11-13 18:17:51,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:17:51,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981085176] [2021-11-13 18:17:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:17:51,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:17:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 62 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:17:52,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:17:52,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981085176] [2021-11-13 18:17:52,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981085176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:17:52,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587052236] [2021-11-13 18:17:52,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:17:52,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:17:52,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:17:52,086 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:17:52,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-13 18:17:52,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-13 18:17:52,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:17:52,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-13 18:17:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:17:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 56 proven. 161 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 18:17:54,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:17:59,735 INFO L354 Elim1Store]: treesize reduction 132, result has 40.0 percent of original size [2021-11-13 18:17:59,735 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 91 treesize of output 123 [2021-11-13 18:18:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 70 proven. 119 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 18:18:00,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587052236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:18:00,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:18:00,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 24] total 55 [2021-11-13 18:18:00,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320531933] [2021-11-13 18:18:00,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:18:00,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-13 18:18:00,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:00,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-13 18:18:00,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=2598, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 18:18:00,203 INFO L87 Difference]: Start difference. First operand 5697 states and 6898 transitions. Second operand has 55 states, 55 states have (on average 3.327272727272727) internal successors, (183), 55 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:18:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:11,946 INFO L93 Difference]: Finished difference Result 7849 states and 9740 transitions. [2021-11-13 18:18:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-13 18:18:11,947 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.327272727272727) internal successors, (183), 55 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-13 18:18:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:11,952 INFO L225 Difference]: With dead ends: 7849 [2021-11-13 18:18:11,952 INFO L226 Difference]: Without dead ends: 6779 [2021-11-13 18:18:11,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 162 SyntacticMatches, 20 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1544, Invalid=9586, Unknown=0, NotChecked=0, Total=11130 [2021-11-13 18:18:11,955 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 552 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1331.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.63ms SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 1521.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:11,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 844 Invalid, 2121 Unknown, 0 Unchecked, 6.63ms Time], IncrementalHoareTripleChecker [209 Valid, 1365 Invalid, 0 Unknown, 547 Unchecked, 1521.36ms Time] [2021-11-13 18:18:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-11-13 18:18:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 5197. [2021-11-13 18:18:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5197 states, 5196 states have (on average 1.2244033872209392) internal successors, (6362), 5196 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:18:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 6362 transitions. [2021-11-13 18:18:14,854 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 6362 transitions. Word has length 98 [2021-11-13 18:18:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:14,854 INFO L470 AbstractCegarLoop]: Abstraction has 5197 states and 6362 transitions. [2021-11-13 18:18:14,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.327272727272727) internal successors, (183), 55 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:18:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 6362 transitions. [2021-11-13 18:18:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 18:18:14,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:14,861 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:14,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-13 18:18:15,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-13 18:18:15,064 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:15,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash 319634599, now seen corresponding path program 25 times [2021-11-13 18:18:15,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:15,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263833558] [2021-11-13 18:18:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:15,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-13 18:18:15,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:15,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263833558] [2021-11-13 18:18:15,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263833558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:18:15,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472637071] [2021-11-13 18:18:15,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:18:15,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:18:15,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:18:15,689 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:18:15,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-13 18:18:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:15,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-13 18:18:15,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:18:22,882 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-11-13 18:18:22,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 193 treesize of output 249 [2021-11-13 18:18:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 129 proven. 40 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 18:18:23,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:18:28,617 INFO L354 Elim1Store]: treesize reduction 482, result has 0.2 percent of original size [2021-11-13 18:18:28,618 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 224 treesize of output 1 [2021-11-13 18:18:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-13 18:18:28,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472637071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:18:28,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:18:28,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 38 [2021-11-13 18:18:28,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284793802] [2021-11-13 18:18:28,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:18:28,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 18:18:28,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:28,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 18:18:28,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 18:18:28,672 INFO L87 Difference]: Start difference. First operand 5197 states and 6362 transitions. Second operand has 38 states, 38 states have (on average 4.2368421052631575) internal successors, (161), 38 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:18:36,137 WARN L227 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 91 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:18:43,257 WARN L227 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 90 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:18:53,152 WARN L227 SmtUtils]: Spent 7.52s on a formula simplification. DAG size of input: 69 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:18:59,281 WARN L227 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 71 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:19:11,554 WARN L227 SmtUtils]: Spent 12.19s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:19:22,831 WARN L227 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 70 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:19:39,421 WARN L227 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 87 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:19:45,374 WARN L227 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 84 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:19:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:55,586 INFO L93 Difference]: Finished difference Result 10996 states and 13755 transitions. [2021-11-13 18:19:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-13 18:19:55,586 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.2368421052631575) internal successors, (161), 38 states have internal predecessors, (161), 0 states have call successors, (0), 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 99 [2021-11-13 18:19:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:55,593 INFO L225 Difference]: With dead ends: 10996 [2021-11-13 18:19:55,594 INFO L226 Difference]: Without dead ends: 8898 [2021-11-13 18:19:55,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6037 ImplicationChecksByTransitivity, 87.9s TimeCoverageRelationStatistics Valid=2742, Invalid=16718, Unknown=0, NotChecked=0, Total=19460 [2021-11-13 18:19:55,598 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 133 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 249.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.00ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 753 IncrementalHoareTripleChecker+Unchecked, 289.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:55,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 556 Invalid, 1217 Unknown, 0 Unchecked, 3.00ms Time], IncrementalHoareTripleChecker [32 Valid, 432 Invalid, 0 Unknown, 753 Unchecked, 289.10ms Time] [2021-11-13 18:19:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8898 states. [2021-11-13 18:19:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8898 to 6536. [2021-11-13 18:19:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 6535 states have (on average 1.2336648814078042) internal successors, (8062), 6535 states have internal predecessors, (8062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:19:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 8062 transitions. [2021-11-13 18:19:59,512 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 8062 transitions. Word has length 99 [2021-11-13 18:19:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:59,512 INFO L470 AbstractCegarLoop]: Abstraction has 6536 states and 8062 transitions. [2021-11-13 18:19:59,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.2368421052631575) internal successors, (161), 38 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:19:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 8062 transitions. [2021-11-13 18:19:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 18:19:59,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:59,518 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:59,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-13 18:19:59,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-13 18:19:59,719 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:59,719 INFO L85 PathProgramCache]: Analyzing trace with hash 508846715, now seen corresponding path program 26 times [2021-11-13 18:19:59,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:59,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111999168] [2021-11-13 18:19:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:59,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 223 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 18:20:01,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:01,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111999168] [2021-11-13 18:20:01,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111999168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:20:01,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197828878] [2021-11-13 18:20:01,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:20:01,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:20:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:20:01,987 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:20:01,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba79525-d717-4637-ab05-ce86188bcc38/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-13 18:20:02,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:20:02,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:20:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-13 18:20:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:20:05,476 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-13 18:20:05,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 27 [2021-11-13 18:20:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 247 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:20:05,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:20:16,389 INFO L354 Elim1Store]: treesize reduction 525, result has 28.1 percent of original size [2021-11-13 18:20:16,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 165 treesize of output 265 [2021-11-13 18:20:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 67 proven. 205 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-13 18:20:18,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197828878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:20:18,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:20:18,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 41, 37] total 96 [2021-11-13 18:20:18,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432603517] [2021-11-13 18:20:18,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:20:18,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-13 18:20:18,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-13 18:20:18,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1169, Invalid=7951, Unknown=0, NotChecked=0, Total=9120 [2021-11-13 18:20:18,722 INFO L87 Difference]: Start difference. First operand 6536 states and 8062 transitions. Second operand has 96 states, 96 states have (on average 2.5625) internal successors, (246), 96 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)